GWCC MV Year 6 Report 9__23.pdf

Georgia World Congress Center 285 Andrew Young International Blvd NW Atlanta, GA 30313

Measurement and Verification Report

Year 6

Prepared by:

Trane – Georgia/Alabama District

4000 DeKalb Technology Parkway Atlanta, GA, 30340

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Executive Summary Trane U.S. Inc. ‘Trane’ is pleased to provide this Measurement and Verification (M&V) report as part of the Guaranteed Energy Savings Performance Contract (hereinafter the “Agreement”), dated September 28, 2015. The purpose of this report is to provide the update on energy savings to the Georgia World Congress Center Authority (Georgia World Congress Center and Centennial Olympic Park) as a result of the energy efficiency retrofits project implemented in 2015 and 2016 by Trane. This report involves the M&V period of July 1, 2022, through June 30, 2023. The following analysis was performed for the Georgia World Congress Center Authority to determine the energy savings of the M&V performance period of year 6. Trane concluded that the total energy cost savings for year 6 of the performance contract was $2,584,063 which exceeds the guaranteed savings of $2,370,098 by $213,965.

PROJECT LIFETIME TOTAL

(6 YEARS)

Energy & Operational

Cost Savings

$17,512,125

Electricity Savings

135,917,254 kWh

Reduced CO2 Emissions

96,322 MT

Performance Period – Current Year Table 1 and Table 2 summarizes the energy and cost savings for the sixth year of the guaranteed period based on the collected data via BAS trends, occupancy schedule, utility bills retrieved from Georgia Power website for electricity, Scana Energy Marketing Inc., City of Atlanta Department of Watershed Management, visual inspections, and measured data during the M&V activities. Total energy cost savings have been calculated utilizing the agreed upon rates in the contract for electricity, gas and water.

Table 1: Year 6 Guaranteed vs. Actual Energy Savings by Utility type

Table 2: Year 6 Guaranteed vs. Actual Energy Cost savings by ECM

Utility Guaranteed

Savings Verified Savings

Ahead / (Behind)

Electric Use (kWh) 20,995,194 22,207,493 1,212,299 Electric Demand (kW) 4,027 4,262 235

Water (kgallons) 17,437 19,691 2,254 Natural Gas (therms) 243,045 200,755 -42,290

ECMs Guaranteed

Savings Verified Savings

Ahead / (Behind)

B Central Plant $438,144 $432,216 -$5,928 Lighting Retrofit $1,655,305 $1,856,520 $201,215 Water / Kitchen $224,659 $243,061 $18,402

Water motor upgrades $2,492 $2,769 $277 Retro-commissioning $49,498 $49,498 $0

Total $2,370,098 $2,584,063 $213,965

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Table of Contents Executive Summary Performance Period – Current Year Project Overview

Project Summary Premises Evaluated

Project Summary Summary of Guaranteed Savings – M&V Year 6 Performance Savings Summary Operational and Maintenance Savings

Total Energy Savings Summary Table Measurement and Verification Approach

Baseline data Energy Savings Calculation Methodology

Option A – Retrofit Isolation Method Option B – Retrofit Isolation with All Parameter Measurement Option C – Continuous Metering Guarantee Option D – Calibrated Simulation

Impact of COVID-19 Trane TraceTM 700 M&V Results Utility Rates

Electricity Natural Gas Water and Sewer Escalated Rates

Baseline Adjustments Routine adjustments:

Non-Routine adjustments:

Owner’s Responsibilities

Trane Intelligent Services (TIS) Tracking Energy Conservation Measures

Appendix

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List of Tables and Figures Table 1: Year 6 Guaranteed vs. Actual Energy Savings by Utility type Table 2: Year 6 Guaranteed vs. Actual Energy Cost savings by ECM Table 3: Summary of Year 6 Guaranteed Energy Savings Table 4: Summary of Year 6 Verified Energy Savings Table 5: Operational and maintenance savings (Cost Avoidance) Year 6 Table 6: Total Energy Savings Summary Table 7: M&V Option used by ECM Table 8: Summary of all lighting ECM savings Table 9: Summary of savings calculation for exterior lighting Table 10: Updated Lighting Power Densities Table 11: Summary of savings calculation for interior lighting Table 12: Summary of savings calculation for water/kitchen retrofits Table 13: M&V results for water features motor upgrade ECM Table 14: Summary of savings calculation for water feature motor upgrade Table 15: Units operation status Table 16: Concourse unit settings/performance June 2023 Table 17: Chiller Performance Table 18: Boiler efficiency results based on combustion test Table 19: M&V Year 6 Trane TraceTM 700 Results – Electric Table 20: M&V Year 6 Trane TraceTM 700 Results – Gas Table 21: M&V Year 6 Trane TraceTM 700 Results – Water Table 22: Electricity Base Rates used for Energy Cost Reduction Calculations Table 23: Natural Gas Base Rates Used for Energy Cost Reduction Calculations Table 24: Water and Sewer Base Rates Used for Energy Cost Reduction Calculations Table 25: Escalated Rates Used for Energy and Operational Cost Reduction Calculations Table 26: System operating conditions based on Agreement

Figure 1: Guaranteed Savings Figure 2: Water ECM Calculation Spreadsheet Snapshot Figure 3: Building A AHU-S5 showing incorrect operation Figure 4: Building A AHU-S3 showing correct operation Figure 5: OAAHU-1 changed preheat setpoint Figure 6: Power Consumed Curve (generated from combustion tests) Figure 7: OA Reset Curve (confirmed with plant trends) Figure 8: HW Reset Curve (Generated from Manufacture’s data and combustion tests) Figure 9: Hot Water Reset Schedule Figure 10: TIS Dashboard Figure 11: Monthly Billed Electrical Consumption Figure 12: Monthly Billed Electrical Demand

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Project Overview

The GWCC, located in downtown Atlanta, Georgia, was constructed in four phases beginning in 1976 (Phase 1), 1984 (Phase 2), 1992 (Phase 3) and 2002 (Phase 4). The facility consists of three main buildings connected by a common lobby/concourse area. Owned by the State of Georgia and operated by the Georgia World Congress Center Authority, the GWCC encompasses 3.9 million square feet and is the fourth largest convention center in the nation, in terms of exhibit hall space. The Georgia International Plaza includes a pedestrian plaza on Andrew Young International Boulevard, adjacent to the Georgia World Congress Center. The Red Deck parking structure is a seven level, 2,000 car parking deck. The Gold Deck parking structure is a 300 car parking deck. The Yellow lot has 1,284 spaces and the marshalling yard next to it has 1,377 spaces.

Centennial Olympic Park (C.O.P.), located in downtown Atlanta, consists of 21 acres of green space along with three major water features, one restaurant/visitors’ center, two pavilions, one amphitheater and the facility operations building.

Project Summary Retrofitted ECMs under this project are:

o ECM1: New B Building Central Energy Plant o ECM2: GWCC Interior Lighting o ECM3: GWCC Exterior Lighting o ECM4: COP Exterior Lighting o ECM5: Water / Kitchen o ECM6: Water Feature Motor Upgrades o ECM7: Building A Retro-commissioning o ECM8: Exhibit Hall Lighting Retrofit

Premises Evaluated The list of facilities specifically included in the IGA are:

o Georgia World Congress Center Building A o Georgia World Congress Center Building B o Georgia World Congress Center Building C o International Plaza o Red Parking Deck o Gold Parking Deck o Yellow Parking Lot and Marshalling Yard o Centennial Olympic Park o Googie Burger and Visitors Center

UTILITY SUMMARY

Georgia Power:

Account #: 3448002 Serves: Building A, B and C (4 meters combined) Rate (tariff): RTP-DA (real-time pricing, day ahead) / MLM-8 (multiple load management) billing structure

Scana Energy Marketing, Inc:

Account: # 23088255009 Serves: 99.7% of the total natural gas consumption of the facility Rate: Marginal Rate

City of Atlanta Department of Watershed Management:

Serves: The entire building system Rate: Commercial rate schedule

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Project Summary

Table 3 and Table 4 summarizes the guaranteed and actual energy savings for the sixth year of the performance Period, July 1, 2022 – June 30, 2023.

Summary of Guaranteed Savings – M&V Year 6

Table 3: Summary of Year 6 Guaranteed Energy Savings

Figure 1: Guaranteed Savings

ECM # ECM Description kWh Demand kW Nat Gas therms

Water kgallons

Guaranteed Savings (Yr. 6)

1 B Central Plant 3,664,892 540 264,619 2,096 $438,144 2 Interior Lighting 8,998,197 1,872 -39,431 5,680 $909,312 3 GWCC Exterior Lighting 4,236,490 729 0 0 $413,527 4 C.O.P. Exterior lighting 698,433 159 0 0 $68,174 5 Water / Kitchen 373,739 0 4,015 6,102 $224,657 6 Water feature motor upgrades 58,744 0 0 0 $2,493 7 Building A Retro-commissioning 308,047 17 41,618 1,472 $49,497 8 Exhibit Hall Lighting 2,656,652 710 -27,776 2,087 $264,292

Total 20,995,194 4,027 243,045 17,437 $2,370,098

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Performance Savings Summary

Table 4: Summary of Year 6 Verified Energy Savings

Operational and Maintenance Savings As defined in the contract and agreed to by GWCC and Trane below are the operational and maintenance savings for year six.

Table 5: Operational and maintenance savings (Cost Avoidance) Year 6

ECM # ECM Description kWh Demand kW Nat Gas therms

Water kgallons

Verified $ Savings

1 B Central Plant 3,620,723 385 174,809 1,299 $432,216 2 Interior Lighting 9,705,262 1,759 -16,036 7,090 $1,006,355 3 GWCC Exterior Lighting 3,894,479 861 - - $380,143 4 C.O.P. Exterior lighting 673,451 152 - - $65,736 5 Water / Kitchen 47,953 - 4,463 7,047 $243,061 6 Water feature motor upgrades 65,271 - - - $2,769 7 Building A Retro-commissioning 308,047 17 41,618 1,472 $49,498 8 Exhibit Hall Lighting 3,892,308 1,089 -4,099 2,784 $404,286

Total 22,207,493 4,262 200,755 19,691 $2,584,063

ECM Description O&M Savings

Year 6 Lighting material cost avoidance (lamps and ballasts) $56,692 Chiller repair cost avoidance $57,964 Chiller major maintenance cost avoidance $208,669 Total Non-Measured Project Benefits $323,325

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Total Energy Savings Summary Table

Table 6: Total Energy Savings Summary

Georgia World Congress Center Project Number G103803

Electrical Energy (kWh)

Electrical Demand

(kW) Gas

(therms) Water

(kgallons)

Electrical Energy (kWh)

Electrical Demand

(kW) Gas

(therms) Water

(kgallons) Energy Savings

Operational and Cost

Avoidance Total Energy Savings

Operational and Cost

Avoidance Total 1 July 2017-June 2018 23,014,810 3,183 190,973 20,356 2,019,616 -844 -52,072 2,919 $2,044,466 $966,672 $2,920,607 $2,244,732 $966,672 $3,211,404 $290,798 2 July 2018-June 2019 23,072,616 4,765 258,386 20,313 2,077,422 738 15,341 2,876 $2,105,801 $498,940 $2,604,741 $2,347,901 $498,940 $2,846,841 $242,101 3 July 2019-June 2020 23,306,818 4,697 234,412 20,657 2,311,624 670 -8,633 3,220 $2,168,975 $444,950 $2,613,925 $2,426,141 $444,950 $2,871,091 $257,167 4 July 2020-June 2021 22,153,298 4,379 233,997 19,524 1,158,104 352 -9,048 2,087 $2,234,043 $387,271 $2,621,314 $2,443,577 $387,271 $2,830,848 $209,534 5 July 2021-June 2022 22,162,220 4,303 198,768 19,624 1,167,026 276 -44,277 2,187 $2,301,066 $342,614 $2,643,680 $2,501,938 $342,614 $2,844,552 $200,872 6 July 2022-June 2023 22,207,493 4,262 200,755 19,691 1,212,299 235 -42,290 2,254 $2,370,098 $323,325 $2,693,423 $2,584,063 $323,325 $2,907,388 $213,965

135,917,254 25,589 1,317,291 120,166 9,946,090 1,427 (140,979) 15,544 $13,224,450 $2,963,772 $16,097,691 $14,548,353 $2,963,772 $17,512,125 $1,414,437 Note: Summed numbers can vary due to rounding decimals.

TOTALS

Year 6: July 2022 - June 2023 - Energy Savings Summary

Actual $ Savings

4,027 kW

Guaranteed $ SavingsDeviation from Guaranteed Savings Energy Savings

Deviation

Annual Guaranteed Energy Savings 20,995,194 kWh 243,045 therms 17,437 kgallons

Year Period

Actual Energy Savings

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Measurement and Verification Approach This section summarizes the energy savings generated during the year 6 guarantee period.

Baseline data

The project base year’s energy consumption data for the pre-retrofit condition is based on the performance and operation of the Georgia World Congress Center (“GWCC”) in the calendar year 2013, established by a full building energy simulation in Trane TraceTM 700. With this tuned model in place, baseline data for this reporting period (performance period) is July 1, 2022, through June 30, 2023. The electric bills were collected from Georgia Power, gas bills from Scana Energy Marketing, Inc., and water bills from City of Atlanta Department of Watershed Management.

Chiller and boiler plant performance trend data including operational conditions such as equipment efficiencies and runtime were collected from Trane’s BAS. Weather data was used for the Atlanta Hartsfield Jackson International Airport weather station over the 12 month period.

Energy Savings Calculation Methodology

The avoided energy costs (i.e., Energy Savings) was measured and calculated following the guidelines provided by International Performance Measurement and Verification Protocols (IPMVP). IPMVP provides four Options (A, B, C and D) for developing and determining savings and implementing a quality M&V process. The method to calculate avoided energy costs will vary depending on the type of M&V option selected for each of the Energy Conservation Measures.

For this project’s measurement and verification process, Trane and GWCC mutually agreed upon Option A, Option B and Option D methods for various ECMs provided by the IPMVP to calculate the savings as stated in the contract.

Table 7: M&V Option used by ECM ECM # ECM Description M&V Option Used 1 B Central Plant D 2 Interior Lighting A 3 GWCC Exterior Lighting A 4 C.O.P. Exterior lighting A 5 Water / Kitchen A 6 Water feature motor upgrades A 7 Building A & C Retro-commissioning B 8 Exhibit Hall Lighting A

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Option A – Retrofit Isolation Method

Savings determination based on Option A is a combination of measured and estimated factors when variations in factors are not expected. Measurements are spot or short-term and are measured at the component or system level, both in the baseline and post-installation cases. This method involves defining the key performance parameters of the energy conservation measure as outlined in the contract. Estimated factors are supported by historical or manufacturer’s data and were agreed upon by both the parties, GWCC and Trane in the contract. Measurements included the key performance parameter(s), which define the energy use of the ECM. The verification techniques for Option A determine energy savings by measuring the capacity or efficiency of a system before and after a retrofit and multiplying the difference by an agreed-upon factor, such as hours of operation or load on the system. Savings are determined by means of engineering calculations of baseline and post-installation energy use based on measured and estimated values. For this project, savings were determined using a combination of spreadsheet calculations and Trane TraceTM 700 simulation model. Dollar savings were calculated using the agreed upon rates in the contract for electricity, gas, and water.

The ECMs that were included in ‘Option A’ Measurement and Verification process are:

o ECM 2: GWCC Interior Lighting o ECM 3: GWCC Exterior Lighting o ECM 4: COP Exterior Lighting o ECM 5: Water / Kitchen o ECM 6: Water Feature Motor Upgrades o ECM 8: Exhibit Hall Lighting Retrofit

Option A ECMs measurement and calculation details:

Energy Conservation Measure Savings - Lighting This energy conservation measure (ECM) involves the installation of high efficiency lighting at the majority of the buildings included in the project.

Table 8: Summary of all lighting ECM savings

Utility Guaranteed

Savings Verified Savings

Ahead / (Behind)

% Ahead/ (Behind)

Electricity Use(kWh) 16,589,772 18,165,499 1,575,727 9% Electric Demand(kW) 3470 3861 391 11% Natural Gas(therms) -67,208 -20,135 47,072 70% Water(kgal) 7,767 9,873 2,106 27% Cost Savings $1,655,305 $1,856,520 $201,215 12%

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Verification Approach

The lighting efficiency improvement project aimed to reduce the connected lighting load while maintaining the lighting level. A qualified electrician measured pre (existing) and post (new) power wattage for a randomly preselected fixtures of each type of lamp/ballast configurations that represent 75% of the total savings.

Each measurement recorded the number of operating lamps, burned out lamps and fixtures connected to the switch, verified by turning the switch on and off. The average wattage per lamp/ballast configuration is defined as the wattage representation of the entire lighting population. Operating time data was agreed upon for both parties (Trane and GWCC).

Savings calculation:

Exterior lighting

The calculation of savings for exterior lighting was determined through an Excel spreadsheet model. The mean power of each lamp type was determined from the pre and post measurements. The difference between the measured pre and post lamp/ballast power wattage was compared and savings were calculated as:

kWh Savings = (Baseline Energy) – (Post-Installation Energy) kWh Savings = [{Sum of kW/Fixture (Pre)*Quantity)}- {Sum of kW/Fixture(Post)*Quantity}] *Hours of Operation

Where:

Baseline Energy = Energy value (kWh) determined from pre-retrofit measurements based on existing (or Pre-installation) lighting kW

Post-Installation Energy = Energy value (kWh) determined from pre-retrofit measurements based on post-installation lighting kW

Table 9: Summary of savings calculation for exterior lighting

Exterior Lighting ECMs Cost Savings, $ Electricity Savings, kWh Demand Savings, kW Guaranteed $481,702 4,934,922 887 Verified savings $445,880 4,567,930 1,013 Variance -35,822 -366,992 126 % Surplus/(Behind) (7.4%) (7.4%) 14.2%

Buildings/Areas included in lighting update:

o Building A o Building B o Building C o Centennial Olympic Park o Googie Burger o Visitor center o A' Marshalling Yard o Red Deck o West Plaza o Yellow lot o North Side Drive

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The short fall in savings was due to the implementation of the Exterior Lighting ECM and a fixture miscount error made during the IGA phase. Due to this discrepancy, Trane, GWCC and the lighting contractor decided to offset the savings by upgrading the existing interior fluorescent fixtures to LED technology in different areas throughout the facility, such as meeting rooms, concourses, back of house, etc.

Interior lighting:

Interior lighting savings calculation was determined through the Trane TraceTM 700 Energy model in coordination with a specialized lighting analysis spreadsheet tool. All changes to the initial model with construction as-built data as well as measured data for pre and post lighting were input in the Templates section of the software. For the first M&V period, it was necessary to modify the lighting internal load templates in the energy model, and thus the expected lighting impact of occupied spaces were updated accordingly. Changes to the lighting density for this ECM (using post-M&V measurements and as-built data) in the model was done. Based on the lighting audit, the lighting power density (LPD) in Watts per square foot was calculated for each Trane TraceTM 700 internal load template, as shown in Table 10.

Table 10: Updated Lighting Power Densities

Trane TraceTM 700 Internal Load Template Lighting Power Density

(W/sf) A Offices 0.46 B Offices 0.74 Back of House 0.47 C Ballroom 0.97 Concourse A 0.27 Concourse B 0.29 Concourse C 0.42 Conference Rooms 0.96 Junior Achievement 1.51 Kitchen 0.59 Show Floor A 0.32 Show Floor B 0.34 Show Floor C 0.30

The Agreement called for a one-time verification and will not be measured in future M&V performance year periods. Year 1 verified energy savings will persist for the remainder of the guarantee using escalated utility rates for dollar savings.

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Table 11: Summary of savings calculation for interior lighting

Energy Conservation Measure Savings – Water/Kitchen

Water energy conservation measure (ECM) consisted of water conservation retrofits of bathroom fixtures-urinals, faucets, and showerheads, kitchen fixtures – kitchen hand sinks, kitchen dish sprayers and pedal valve on prep sinks and ice machines. The calculation of savings for this ECM was determined through an Excel spreadsheet model. The energy savings and savings verification process and calculation method is presented below.

Table 12: Summary of savings calculation for water/kitchen retrofits

Utility Guaranteed Savings

Verified Savings

Guaranteed $ Savings

Verified $ Savings

Ahead / (Behind)

Bathroom fixtures, kitchen dish sprayers & Aqua ice machines water (kgallons)

6,102 7,047 $206,639 $238,625 $31,986

Aqua Kit (therms) 4,015 4,463 $2,159 $2,401 $241 ICE Machine, A, B, C and WC ICE A & B (kWh) 373,739 47,953 $15,858 $2,035 -$13,823

Cost Savings $224,656 $243,061 $18,405

The Agreement called for a one-time verification and will not be measured in future M&V performance year periods. Year 1 verified energy savings will persist for the remainder of the guarantee using escalated utility rates for dollar savings.

Verification Approach

The methodology uses existing (pre) and as-built (post) fixture counts and measured flush rates as well as the agreed upon stipulated parameters described in the Agreement. Pre (existing) and post (new) water flow or per flush rates for a sample of plumbing fixtures were measured (A sample of 10 fixtures of each type was used which represented 75% of the total savings). The average flow/flush rates were the values representing the entire plumbing fixture population.

The difference between the measured pre and post flow/flush rates were compared and that became the basis for the savings.

Interior Lighting ECMs kWh kW therms kgallons Cost Savings

Guaranteed Savings 11,654,849 2,582 -67,207 7,767 $1,173,604 Verified savings 13,597,570 2,847 -20,135 9,873 $1,410,641 Variance 1,942,721 265 47,072 2,106 $237,037 % Surplus/(Behind) 17% 10% 70% 27% 20%

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The energy savings for the Water ECM are determined by correctly applying the utility rates to the calculated actual energy units. The water consumption baseline for each building was calculated by factoring in the number of people, times the average number of flushes per day, times number of days per year of use, times the average water flow (gallons per flush). GWCC and Trane collaboratively agreed upon these assumptions and the results throughout the calculations process. The annual energy savings are determined by subtracting the Post Retrofit (as built) water consumption (gal), and costs, from the pre retrofit (baseline) water consumption (gal) and costs. The post retrofit measured flow rates were used to develop the average flow rate by fixture type. Energy savings calculation was done by;

Water Fixtures:

𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸 𝑆𝑆𝑆𝑆𝑆𝑆𝑆𝑆𝐸𝐸𝐸𝐸𝑆𝑆 $ = (𝐵𝐵𝑆𝑆𝑆𝑆𝐸𝐸𝐵𝐵𝑆𝑆𝐸𝐸𝐸𝐸 𝐸𝐸𝑆𝑆𝐵𝐵 − 𝐴𝐴𝑆𝑆𝐴𝐴𝐴𝐴𝑆𝑆𝐵𝐵𝐴𝐴 𝐸𝐸𝑆𝑆𝐵𝐵) ∗ �𝑊𝑊𝑆𝑆𝐴𝐴𝐸𝐸𝐸𝐸 𝑅𝑅𝑆𝑆𝐴𝐴𝐸𝐸 �

𝐸𝐸𝑆𝑆𝐵𝐵

� + 𝑆𝑆𝐸𝐸𝑆𝑆𝐸𝐸𝐸𝐸 𝑅𝑅𝑆𝑆𝐴𝐴𝐸𝐸 �

𝐸𝐸𝑆𝑆𝐵𝐵

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Figure 2: Water ECM Calculation Spreadsheet Snapshot

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Water related electrical energy savings retrofit:

The pre (existing) and post (new) sample of electrical energy consumption of ice machines were measured. The average electrical energy consumption was the value representing the entire ice machine population. The difference between the measured electrical energy consumption was compared and that became the basis for the savings.

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Water related gas savings retrofit:

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Energy Conservation Measure Savings - Water Feature Motor Upgrades

During the construction of the project, two of the new pump motors were not installed based on the following:

• Main water feature motor in Building B was decommissioned.

• Fish pond water feature 2 already had a high efficiency motor in place.

For the remainder of the pumps replaced by this project (2 total), motor kW prior to retrofit and after retrofit was measured and recorded. The annual operating hours for each water feature motor was stipulated. The difference between the measured pre and post motor kW was compared and became the basis of the savings.

Table 13: M&V results for water features motor upgrade ECM

The Agreement called for a one-time verification and will not be measured in future M&V performance year periods. Year 1 verified energy savings will persist for the remainder of the guarantee using escalated utility rates for dollar savings.

Table 14: Summary of savings calculation for water feature motor upgrade

Pre-M&V Post-M&V

# Location kW Amp Volts Power Factor kW Amp Volts Power

Factor 1 Main 6.98 15 480 0.539 - - - - 2 Fish pond 1 8.3 208 - 9 208 - 3 Fish pond 2 - - - - - - - - 4 Maple pond - - - - - - - - 5 Flare 5.3 488 - 5 488 -

Water Feature Motor Upgrade ECM kWh Cost Savings

Guaranteed Savings 58,744 $2,492 Verified savings 65,271 $2,769 Variance 6,527 $277 % Surplus/(Behind) 11% 11%

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Option B – Retrofit Isolation with All Parameter Measurement

This option is based on periodic or continuous measurement of energy use taken at the component or system level when variations in factors are expected. Energy or proxies of energy use are measured continuously. Periodic spot or short-term measurements may be sufficient when variations in factors are not expected. Savings are determined from analysis of baseline and reporting period energy use or proxies of energy use. Direct measurements and estimated values, engineering calculations and/or component of system models are often developed through regression analysis. Adjustments to models are not typically required.

ECM 7: Retro-commissioning ECMs

7a. Building A: Updating single zone units’ chilled water and hot water coil operation

Trends were created in the JCI Metasys BAS to monitor and validate the performance of the retro-commissioning work done in the single zone units located in the Concourse area of Building A.

Based on the retro-commissioning sheets, all units passed the established functional performance test, indicating all changes were done and successfully implemented. Analyzing the collected data for this performance year it was observed that eight out of eleven units retro-commissioned were operating as specified in our scope of work. These units are listed in Table 15 below. In addition, a comparison is shown in Figure 3 and Figure 4 showing one AHU with coils operating incorrectly and another unit following the sequence specified in the contract.

Table 15: Units operation status

Correct Operation Incorrect Operation

S-2, S-3, S-4, S-6, S-9, S-10, S-12, S-13 S-1, S-5, S-11

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Figure 3: Building A AHU-S5 showing incorrect operation

Figure 4: Building A AHU-S3 showing correct operation

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7b. Building A: Concourse and Exhibit Hall Single Zone Units Simultaneous Heating/Cooling

Trends were created in the JCI Metasys BAS to monitor and validate the performance of the retro-commissioning work done in the single unit located in the concourse area in Building A. It was validated that all of these units have the same zone temperature set point when operating at the same time. It was also confirmed that the supply air temperature is very similar for each unit, which confirms the statement that these units are not fighting each other for cooling or heating the concourse area.

Table 16: Concourse unit settings/performance June 2023

Air Handling Unit Room Setpoint (°F) CHW Valve Pos. HW Valve Pos.

AHU-S1 70 100% 0%

AHU-S2 70 100% 0%

AHU-S3 70 100% 0%

AHU-S4 70 100% 0%

AHU-S5 70 100% 0%

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7c. Building A: Outside Air Unit RCX

Trends were created in the JCI Metasys BAS to monitor and validate the retro-commissioning work done in the Outside Air Unit (OAAHU) in Building A. It was verified that the preheat coil temperature set point was changed from 80F to 50F and the leaving air temperature set point was set to 55F. However, during the retro-commissioning work done during the project’s construction phase, it was detected that the Temperature Low Limit Sensor was bad and needed replacement. This sensor being out of service will prevent the unit from operating.

Figure 5: OAAHU-1 changed preheat setpoint

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Option C – Continuous Metering Guarantee

This option is based on continuous measurements of energy use taken at the meter level when variations in factors are expected. Energy or proxies of energy use are measured continuously.

This method involves collecting utility bills throughout the guarantee period and comparing them to the adjusted baseline. Energy savings are calculated using the following equation:

Avoided Energy Use (Savings) = (Baseline Energy Use) adjusted – (Post Installation Energy Use)

Where;

Adjusted-baseline Energy is defined as the baseline energy and any routine and non-routine adjustments needed to adjust it to the conditions of the reporting period.

This option was not included in this project.

Option D – Calibrated Simulation

Option D involves the use of computer simulation software to predict facility energy usage for the baseline and/or reporting period. Option D can be used to assess the performance of all ECMs in a facility; however, the simulation tool also allows estimating the savings attributable to each ECM within a multiple ECM project. As the system is complex, ECM interactive effects are also complex, unpredictable changes in the occupancy and schedule of the buildings make the computation of non-routine adjustments so inaccurate that Options A, B or C would create excessive error in the savings determination for this facility.

For this project, Option D method was used to calculate the savings for ECM 1 New Central Energy Plant in Building B. Data was trended in the Building Automation System (BAS). The collected data was input in an updated detailed energy simulation model built in collaboration with Griffith Engineering, Inc. (GEI). The energy model was created using Trane TraceTM 700 to help predict energy usage over the course of the year. The model is "calibrated" so that it predicts an energy pattern that approximately matches actual metered data for baseline energy usage with acceptable accuracy during the baseline year. The following inputs were revised for this M&V period based on unique information from the site.

• Calendar / occupancy schedule

• Weather data

• Chilled water plant performance

• Hot water plant performance

For Option D, two calibrated models are included; one corresponds to the baseline case (no ECMs) and another includes all of the implemented ECMs. In either case, the models and measured energy data are under the same set of operating conditions. Savings with Option D can be calculated using two forms of Equations, Equations 1f) and 1g) given by IPMVP guideline.

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Avoided energy (Savings) = Baseline energy from the calibrated model [hypothetical or without ECMs] – Reporting-period energy from the calibrated model [with ECMs]

Or, Avoided Energy (Savings) = Baseline energy from the calibrated model [hypothetical or without ECMs] - Actual calibration-period energy +/- Calibration error in the corresponding calibration reading

Trane TraceTM 700 model simulation details for new B Central Plant

Model Changes

The energy model used for M&V involves two separate simulations of the building, with the difference in energy usage between the two representing the savings. The baseline simulation of the model was built upon a previously calibrated model, with an adjusted baseline and lighting improvements already included. The proposed simulation incorporates the changes that have been made to the chiller and boiler plants. Because of this, the model updates for calendar and weather have been made to both simulations. The chiller and boiler performance updates are only made to the proposed simulation.

Calendar

The custom calendar for the energy model was modified based on the actual event schedule obtained from the GWCC. Based on actual events, the TRACE calendar assigns each day of the simulation to one of eight different day types.

The calendar was updated with newly received event data from the period of July 2022 through June 2023.

Weather

Actual weather data for Atlanta (Hartsfield Jackson International Airport weather station) was obtained and used for the model simulation. The obtained data was input into a full year’s weather file for the model. Since this M&V period spans the latter half of 2022 and the first half of 2023, the corresponding months within the updated weather file also correspond to the actual years covered.

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Chiller Performance

For each chiller, the weighted average kW/ton during the M&V period was calculated based on 15-minute interval data. The table below shows the average weighted efficiency used in the model for each chiller. The efficiencies in kW/ton were weighted based on the calculated tonnage at that interval versus the overall sum of tonnages. Only periods when the chiller is on and actively running are considered.

Table 17: Chiller Performance Chiller Tag Name in Trace Model Average kW/ton B-1 4160 Chiller 1 0.459 B-2 4160 Chiller 2 0.671 B-3 4160 Chiller 3 0.600 B-4 VFD Chiller 0.568

Boiler Performance

To estimate an average boiler efficiency, new measurements were taken via combustion and condensate analysis. However, at the time there were issues with boiler 1 and boiler 3 resulting in them being offline. The gathered data is shown in the following table .

Table 18: Boiler efficiency results based on combustion test

Fire Rate

O2% Stack

Temp. (°F) Supply

Temp. (°F) Return

Temp. (°F) Resulting Efficiency

Boiler 1 - - - - - - Boiler 1 - - - - - - Boiler 1 - - - - - - Boiler 2 25% 14.7% 104 °F 95°F 93°F 91% Boiler 2 50% 13.8% 136 °F 99°F 94°F 91% Boiler 2 75% 11.6% 156 °F 103°F 94°F 90% Boiler 3 - - - - - - Boiler 4 50% 14.2% 138 °F 100°F 94°F 89% Boiler 4 75% 13.1% 158 °F 104°F 93°F 89% Boiler 4 100% 9.1% 183 °F 109°F 92°F 89% Boiler 5 50% - - - - - Boiler 5 75% 13.4% 151 °F 112°F 100°F 89% Boiler 5 100% 9.6% 171 °F 106°F 98°F 89% Boiler 6 50% 8.2% 173 °F 118°F 110°F 89% Boiler 6 75% 7.1% 195 °F 120°F 110°F 89% Boiler 6 100% 6.0% 217 °F 124°F 110°F 88%

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The result of the combustion analysis was an average boiler combustion efficiency of 88.85% with 120°F supply water temperature (methodology from BTS-2000 was used to calculate the efficiency).

The graphs below show the three curves used in the model, generated or confirmed from the combustion tests and plant trend data.

Figure 6: Power Consumed Curve (generated from combustion tests)

Figure 7: OA Reset Curve (confirmed with plant trends)

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Figure 8: HW Reset Curve (Generated from Manufacture’s data and combustion tests)

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Impact of COVID-19 In the previous 3 years, the global impact of COVID-19 had resulted in widespread cancellations and shutdowns of large, public events. Previously, this heavily affected our M&V analyses and results as the baseline energy usage dropped considerably. In the past year, however, the GWCC has been seeing a return to more typical levels. Although we now have a much fuller schedule of events, it must still be noted that the schedule of events is still much less condensed than initial M&V periods. Because of this, some effects of COVID-19 social distancing and the rising popularity of virtual events are still reflected in the building’s performance.

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Trane TraceTM 700 M&V Results Based on the two simulations in the energy model, the savings were determined for the chiller and boiler plant improvements. A monthly energy consumption report has been generated from the model showing the difference in consumption between the two simulations. The tables below summarize the M&V results and compare them to the project guaranteed savings.

Table 19: M&V Year 6 Trane TraceTM 700 Results – Electric

Table 20: M&V Year 6 Trane TraceTM 700 Results – Gas

Month Jul-22 3,317,866 3,001,912 315,954

Aug-22 3,826,772 3,499,255 327,517 Sep-22 3,251,822 2,957,645 294,177 Oct-22 3,042,937 3,737,956 304,981

Nov-22 3,035,744 2,733,569 302,175 Dec-22 2,802,400 2,495,229 307,172 Jan-23 3,141,954 2,842,567 299,388 Feb-23 2,697,590 2,419,467 278,124 Mar-23 3,190,446 2,885,974 304,472 Apr-23 2,982,524 2,688,715 293,809

May-23 3,204,340 2,904,254 300,087 Jun-23 3,422,272 3,129,402 292,869 Total: 37,916,666 34,295,944 3,620,723

Modeled Baseline kWh

Modeled Proposed kWh

Modeled kWh Savings

Month Jul-22 28,270 23,148 5,122

Aug-22 31,535 26,339 5,197 Sep-22 30,782 25,647 5,135 Oct-22 113,229 90,896 22,333

Nov-22 123,935 103,058 20,877 Dec-22 148,045 128,012 20,033 Jan-23 140,600 119,581 21,019 Feb-23 114,836 95,105 19,731 Mar-23 132,189 109,721 22,468 Apr-23 113,689 91,026 22,663

May-23 31,612 26,416 5,196 Jun-23 29,691 24,657 5,034 Total: 1,038,414 863,605 174,809

Modeled Baseline therms

Modeled Proposed therms

Modeled therms Savings

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Table 21: M&V Year 6 Trane TraceTM 700 Results – Water

Month

Jul-22 3,371 3,299 72 Aug-22 3,937 3,866 71 Sep-22 2,743 2,677 65 Oct-22 1,741 1,609 132

Nov-22 1,490 1,350 140 Dec-22 1,091 941 150 Jan-23 1,480 1,339 142 Feb-23 1,394 1,267 127 Mar-23 1,861 1,722 139 Apr-23 1,798 1,670 127

May-23 2,438 2,369 68 Jun-23 3,198 3,132 66 Total: 26,541 25,242 1,299

Modeled Baseline kgallon

Modeled Proposed kgallon

Modeled kgallon Savings

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Utility Rates

GWCC’s Georgia Power electricity bill associated with the main facility (Buildings A, B, & C) is based on input from four meters which are combined (multiple load management) from a billing perspective. The Georgia Power GWCC electricity-billing tariff is an RTP-DA (real-time pricing, day ahead) / MLM-8 (multiple load management) billing structure. Mutually agreed upon rates by both Trane and the customer were used to calculate the savings for this performance period. The agreed upon rates are given in the table below:

Table 22: Electricity Base Rates used for Energy Cost Reduction Calculations GWCC Incremental Electricity Rates ECM # ECM Description Incremental

$/kWh rate 1 B Central Plant $0.069 2 Interior Lighting $0.087 3 GWCC Exterior Lighting $0.087 4 C.O.P. Exterior Lighting $0.087 5 Water/Kitchen $0.038 6 Water feature upgrades $0.038 7 Building A&C Retro-commissioning $0.038 8 Exhibit Hall Lighting $0.087

Natural Gas

The marginal natural gas rate is based on the main meter serviced by Scana Energy Marketing, Inc. (Account # 23088255009) as its usage represents 99.7% of the total natural gas consumption.

Table 23: Natural Gas Base Rates Used for Energy Cost Reduction Calculations Rate Effective Marginal therm Rate $0.48 / therm

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Water and Sewer

City of Atlanta Department of Watershed Management bills the Georgia World Congress Center facility under a commercial rate schedule. The following table shows the mutually agreed upon rates by Trane and the customer to calculate the savings for this performance period:

Table 24: Water and Sewer Base Rates Used for Energy Cost Reduction Calculations Water Use (CCF) Wastewater (CCF) Combined W/WW Case Charge $6.76 $6.76 $13.51

1-3 CCF $2.66 $10.03 $12.69

4-6 CCF $5.50 $14.05 $19.55

7 & above CCF $6.34 $16.16 $22.51 Security Sub-charge $0.15 $0.00 $0.15 Effective Rates Water Rate $8.48 $21.60 $30.09

Escalated Rates

Rates escalation has been established in the Investment Grade Audit Agreement document, ARTICLE 2, Scope of Energy Audit and Energy Audit Report, Section 2.3.8.2 Acceptable Proposed Savings. The following table shows the escalated rates that were used for the year 6 M&V report.

Table 25: Escalated Rates Used for Energy and Operational Cost Reduction Calculations Utility / Item Escalation Rate Electric 3% Natural Gas 3% Water 3% Material/commodity cost savings 3% Allowable contract labor saving 3%

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Baseline Adjustments Trane reserves the right to make baseline adjustments in response to changes to the facility(s) or deviations in the operating parameters per the Agreement. Trane has periodically reviewed systems and facility operations to determine if all of the operational parameters are as per contract; if there are any changes on any of the parameters a baseline adjustment is done.

Routine adjustments:

The baseline utility data for the electric meter and the new central chilled water plant performance data is always adjusted for weather conditions and the occupancy calendar in order to have a valid comparison for savings calculation. For electric demand (kW) and consumption (kWh) - the adjustment is made based on cooling degree-days and for natural gas consumption (therms) - the adjustment is based on heating degree-days. Adjusted baseline data is derived from the Trane TraceTM 700 software and accounts for hourly weather conditions. The building(s) occupancy and/or equipment and/or lighting utilized is a variable which is adjusted for every M&V period. GWCC’s event calendars are used to input the occupied hours and occupancy for the performance period.

Avoided Energy use (Savings) = (Baseline Energy ± Routine Adjustments to the Reporting period conditions) – Reporting period Energy

Non-Routine adjustments:

Trane also reserves the right to make baseline adjustments in response to changes to the facility(s) or deviations in the operating parameters. A non-routine adjustment will need to be made to the baseline model to account for something that was modified during the M&V period that is not typical. Some changes that can lead to the need for non-routine adjustments in GWCC include, but are not limited to:

• Additions to the building, such as a new exhibit hall or wing of the building.

• Changes to the rentable locations of the building, such as when an exhibit hall or other large space become ineligible for rented activities. Alternatively, previously not rented space may have become rentable.

• Major equipment changes including new plant heating or cooling equipment, HVAC airside systems, lighting retrofits, and base loads.

• Increased ventilation rates for code compliance and the addition of heating and/or air-conditioning to areas that previously had no environment conditioning.

The non-routine adjustments are described by the equation as follows;

Avoided Energy Use (Savings) = (Adjusted Baseline Energy Use) – (Reporting Period Energy Use) ± Non-Routine Adjustments of the baseline energy to reporting period conditions Where;

Adjusted Baseline Energy is defined as the baseline energy and any routine adjustments needed to adjust it to the conditions of the reporting period

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Owner’s Responsibilities

Besides the above mentioned non-routine adjustments list, Trane also reserves the right to make baseline adjustments for below listed points for owner’s responsibility. GWCC agrees to contact Trane within seven (7) calendar days of commencement of any changes or additions of equipment or environments. At Trane’s discretion, the Baseline may be adjusted based on the data or newly discovered information. The baseline may be adjusted for failures by the GWCC to perform its obligations under the Agreement or in the event, any representation or warranty made by the GWCC under the Agreement is false or misleading. The GWCC shall be responsible for maintaining the following operating parameters during the contract time:

Table 26: System operating conditions based on Agreement

ECM Post-Retrofit Operating Parameters

Permissible Variance

Operating period

ECM 1: B Central Plant

(1) Primary heating hot water supply temperature set point 180°F with reset based on Schedule below.

(1) +10°F, -no limit (See Schedule)

24x7, 365 days

(2) Condenser Water approach to be set at 7°F with a minimum of 60°F (CW entering chiller – OA wet bulb = 7)

(2) +/- 2°F

(3) CHW supply temperature set point of 42°F (3) -2°F, + no limit

ECM 2: Interior Lighting Retrofits

Operating hours per daily GWCC show schedule of period in question N/A

Per operating hours from GWCC show schedule

ECM 3: GWCC Exterior Lighting

Parking Lot and Deck lighting per daily GWCC show schedule of period in question

N/A Dusk to dawn and per

Area lighting from dusk to dawn and adjusted for GWCC show schedule of period in question

N/A operating hours from GWCC show schedule

ECM 4: C.O.P. Exterior Lighting

Area lighting from dusk to dawn and adjusted for C.O.P. show schedule of period in question

N/A

Dusk to dawn and per operating hours from C.O.P. show schedule

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ECM Post-Retrofit Operating Parameters

Permissible Variance

Operating period

ECM 5: Water / Kitchen Usage per daily GWCC show schedule of period in question N/A 24x7, 365 days ECM 6: Water Feature Motor Upgrades

Usage per daily GWCC show schedule of period in question N/A 24/7, 365 days ECM 7a: Targeted Retro-commissioning - OAAHU

Post-commissioning OAAHU Preheat set point of 40°F +3°F, - no limit 24x7, 365 days ECM 7b: Targeted Retro-commissioning - SZ and Exhibit Hall Simultaneous Heating and Cooling

Post-commissioning heating and cooling space set point range of 4°F -0°F, + no limit

5am – Midnight. 365 days

ECM 7c: Targeted Retro-commissioning – Building “A” SZ Coil Control

Post-commissioning Cooling and Heating coil valve position set to 0% when the unit supply fan is off

None on CHW, +10% on HW (if required for freeze protection)

Per operating hours from GWCC show schedule

ECM 8: Exhibit Hall Lighting Retrofits

Operating hours per daily GWCC show schedule of period in question None

Per operating hours from GWCC show schedule

Figure 9: Hot Water Reset Schedule

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Trane Intelligent Services (TIS) Trane Intelligent Services (TIS) is Trane’s cloud based energy management platform. TIS allows us to gain a deeper understanding of the way the GWCC operates through the use of analytics and data trends. As part of the project, the GWCC was linked to the TIS platform. Trane personnel have been continuously monitoring the performance of the GWCC and using the TIS platform to proactively address inefficient operations. The following pages will give a glance into how TIS has helped maintain the operational efficiency of the GWCC chiller plant.

Below is a sample of the live energy dashboard that is being used at the GWCC. This dashboard brings in data points from the electricity and gas meters at the GWCC. The dashboard then displays the consumption and demand metrics in easy to read graphical displays. The dashboard sums up similar utilities into one value for the building. In the case of the electrical consumption, there are four meters at the GWCC and each is brought in to one “virtual,” meter in the dashboard.

Figure 10: TIS Dashboard

The display above can be used in a “kiosk,” format to create awareness in the GWCC. It allows patrons to see the real time energy consumption of the building that they are visiting. In addition, it gives insight into the performance of the energy conservation measures the GWCC has undertaken.

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Tracking Energy Conservation Measures

The progress of the construction and implementation of the energy conservations measures are shown in the graphs below. There was a clear decrease in both consumption and demand across the construction period. The data used in these graphs is pulled directly from TIS and allows for long term tracking, trending, and base lining.

Figure 11: Monthly Billed Electrical Consumption

Figure 12: Monthly Billed Electrical Demand

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Appendix Appendix A: Monthly Electric Bill (from January 2015 to June 2023)

Month Meter Read Billing Days Total kWh

Peak kW Demand

Electric Service Total

Jan-15 1/26/2015 34 5,352,397 9,520 $420,539 Feb-15 2/24/2015 29 5,026,843 13,230 $394,749 Mar-15 3/25/2015 29 5,118,023 11,119 $381,936 Apr-15 4/24/2015 30 5,256,410 12,776 $375,580 May-15 5/26/2015 32 5,299,430 11,367 $390,150 Jun-15 6/24/2015 29 5,229,045 12,215 $456,356 Jul-15 7/24/2015 30 5,816,344 12,339 $566,053 Aug-15 8/25/2015 32 6,054,105 13,678 $646,313 Sep-15 9/24/2015 30 4,948,966 10,735 $566,523 Oct-15 10/23/2015 29 4,845,814 10,206 $408,652 Nov-15 11/23/2015 31 5,596,865 12,679 $382,147 Dec-15 12/23/2015 30 4,269,184 9,239 $321,546 Jan-16 1/26/2016 34 5,630,868 11,167 $415,702 Feb-16 2/24/2016 29 5,322,798 11,367 $400,991 Mar-16 3/25/2016 30 5,494,040 11,281 $388,039 Apr-16 4/25/2016 31 5,060,897 10,049 $354,524 May-16 5/24/2016 29 4,138,200 8,095 $299,942 Jun-16 6/23/2016 30 3,767,784 7,841 $359,319 Jul-16 7/25/2016 32 4,815,527 10,611 $394,359 Aug-16 8/24/2016 30 4,610,862 11,842 $482,418 Sep-16 9/23/2016 30 4,627,320 12,911 $480,864 Oct-16 10/24/2016 31 4,590,709 12,350 $350,322 Nov-16 11/22/2016 29 3,303,038 6,734 $231,479 Dec-16 12/22/2016 30 3,087,282 6,226 $207,242 Jan-17 1/25/2017 34 3,590,848 6,161 $281,548 Feb-17 2/23/2017 29 3,213,611 8,051 $266,177 Mar-17 3/24/2017 29 3,188,373 6,885 $246,868 Apr-17 4/25/2017 32 3,215,056 6,885 $233,634 May-17 5/24/2017 29 3,283,700 9,358 $228,234 Jun-17 6/23/2017 30 3,691,235 8,365 $336,608 Jul-17 7/25/2017 32 3,746,609 7,420 $340,909 Aug-17 8/24/2017 30 3,480,695 7,295 $398,888 Sep-17 9/25/2017 32 3,494,430 9,029 $407,378 Oct-17 10/24/2017 29 3,423,400 9,218 $276,545 Nov-17 11/21/2017 28 2,912,004 5,994 $210,696 Dec-17 12/21/2017 30 3,320,126 8,494 $210,966

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Month Meter Read Billing Days Total kWh

Peak kW Demand

Electric Service Total

Jan-18 1/24/2018 34 4,257,164 7,187 $322,928 Feb-18 2/22/2018 29 3,789,373 8,786 $296,052 Mar-18 3/23/2018 29 3,582,360 7,285 $247,353 Apr-18 4/24/2018 32 3,863,780 7,484 $266,462 May-18 5/24/2018 30 4,028,029 9,455 $272,525 Jun-18 6/25/2018 32 4,186,674 8,132 $369,302 Jul-18 7/25/2018 30 3,985,508 7,949 $364,755 Aug-18 8/24/2018 30 4,392,446 12,080 $451,824 Sep-18 9/25/2018 32 4,199,905 10,357 $445,638 Oct-18 10/24/2018 29 3,696,751 7,808 $241,093 Nov-18…