Roxbury Community College ASHRAE Level II Energy and Water Audit and Feasibility Study.pdf

westonandsampson.com

March 2015 proposal

Roxbury Community College ASHRAE Level II Energy and Water Audit and Feasibility Study proposal

Division of Capital Asset Management and Maintenance (DCAMM)

Five Centennial Drive, Peabody, MA 01960-7985 tel: 978-532-1900 fax: 978-977-0100 report environmental/infrastructure consultants

Division of Capital Asset Management and Maintenance (DCAMM) Roxbury Community College Energy and Water Feasibility Study March 2015 www.westonandsampson.com i

TABLE OF CONTENTS

Page

EXECUTIVE SUMMARY .............................................................................................................. iii

1.0 INTRODUCTION AND BACKGROUND ........................................................................ 1-1

2.0 EXISTING CONDITIONS ASSESSMENT ..................................................................... 2-3

2.1 Visual/Performing Arts Building .................................................................................. 2-3

2.2 Administration Building ............................................................................................... 2-7

2.3 Academic Building .................................................................................................... 2-12

2.4 Student Center ......................................................................................................... 2-16

2.5 Reggie Lewis Track / Athletic Center ....................................................................... 2-20

2.6 Dudley House ........................................................................................................... 2-33

2.7 Exterior Lighting ....................................................................................................... 2-38

3.0 UTILITY ANALYSIS ..................................................................................................... 3-42

3.1 Electric Utility ............................................................................................................ 3-42

3.2 Water / Sewer Utility ................................................................................................. 3-66

3.3 Gas Utility ................................................................................................................. 3-69

3.4 Energy Baseline ....................................................................................................... 3-77

3.5 Utility Incentives ....................................................................................................... 3-78

4.0 ENERGY CONSERVATION MEASURES ................................................................... 4-80

4.1 Operational Measures .............................................................................................. 4-80

4.2 Energy Supply Measures ......................................................................................... 4-81

4.3 ECM 01.00 – Lighting ............................................................................................... 4-82

4.4 ECM 02.00 – Lighting Controls ................................................................................ 4-83

4.5 ECM 03.00 – Electric Motors .................................................................................... 4-83

4.6 ECM 04.00 – Energy Management System and Controls ........................................ 4-83

4.7 ECM 05.00 – Domestic Water .................................................................................. 4-87

4.8 ECM 06.00 – Sewer Conservation ........................................................................... 4-89

4.9 ECM 07.00 – Process Water Conservation .............................................................. 4-89

4.10 ECM 08.00 – Steam Heating Improvements ............................................................ 4-90

4.11 ECM 09.00 – Variable Frequency Drives ................................................................. 4-90

4.12 ECM 10.00 – Insulation ............................................................................................ 4-91

4.13 ECM 11.00 – Vending and Plug Load Controllers .................................................... 4-98

4.14 ECM 12.00 – Window and Doors ............................................................................. 4-98

4.15 ECM 13.00 – Biomass .............................................................................................. 4-99

4.16 ECM 14.00 – Boilers .............................................................................................. 4-100

4.17 ECM 15.00 – Chillers ............................................................................................. 4-100

4.18 ECM 16.00 – Cogeneration .................................................................................... 4-100

4.19 ECM 17.00 – Unknown HVAC ............................................................................... 4-100

4.20 ECM 18.00 – Retro-Commissioning ....................................................................... 4-100

4.21 ECM 19.00 – Real-Time Metering .......................................................................... 4-101

4.22 ECM 20.00 – Energy Efficient Roof Coatings/Roof Repair .................................... 4-101

4.23 ECM 21.00 – Renewable Energy Systems ............................................................ 4-101

4.24 ECM 22.00 – Misc. Specialty Equipment ............................................................... 4-102

4.25 ECM 23.00 – Other Recommendations ................................................................. 4-103

4.26 Summary of Energy Conservation Measures ......................................................... 4-106 www.westonandsampson.com ii

5.0 RENEWABLE ENERGY EVALUATION ..................................................................... 5-107

5.1 Solar Photovoltaics ................................................................................................. 5-107

5.2 Solar Thermal ......................................................................................................... 5-109

5.3 Wind Energy ........................................................................................................... 5-120

5.4 Ground Source Heat Pumps .................................................................................. 5-120

6.0 SUMMARY AND RECOMMENDATIONS .................................................................. 6-124

7.0 REFERENCES ........................................................................................................... 7-126

LIST OF TABLES

Table 1 .............................................................................................. Roxbury Community College Table 2 .............................................. Visual/Performing Arts Building - Interior Lighting Summary Table 3 ........................................................... Visual/Performing Arts Building – Existing Controls Table 4 ............................ Administration Building – Electric Base Board Heaters Not on the EMS Table 5 ........................................................... Administration Building - Interior Lighting Summary Table 6 ........................................................................ Administration Building – Existing Controls Table 7 ................................... Academic Building – Electric Base Board Heaters Not on the EMS Table 8 .................................................................. Academic Building - Interior Lighting Summary Table 9 ............................................................................... Academic Building – Existing Controls Table 10 ...................................... Student Center – Electric Base Board Heaters Not on the EMS Table 11 ..................................................................... Student Center - Interior Lighting Summary Table 12 ................................................................................... Student Center – Existing Controls Table 13 ................................................................................................. RLTAC Boiler Efficiencies Table 14 ................................................................................................... RLTAC HVAC Schedule Table 15 .................................................................................. RLTAC - Interior Lighting Summary Table 16 ....................................................................................... RCC-Exterior Lighting Summary Table 17 .................................... Roxbury Community College Main Campus Electric Usage Data Table 18 ..................................... Roxbury Community College Main Campus Electric Billing Data Table 19 ........................................................................................... RCC Electric Billing Breakout Table 20 ........................................... Roxbury Community College Main Electric Meter Bldgs. 1-4 Table 21 ............................................... RCC Campus Regression Usage Breakouts 2009 & 2013 Table 22 .............................................................................. End Use Disaggregation Percentages Table 23 ...................................................................................... Patriot Energy Charges per kWh Table 24 ................................ RCC -Reggie Lewis Track and Athletic Center Electric Usage Data Table 25 ................................. RCC -Reggie Lewis Track and Athletic Center Electric Billing Data Table 26 ....................................................................................... RLTAC Electric Billing Breakout Table 27 ........................................................ Roxbury Community College RLTAC Electric Meter Table 28 .................................................... RLTAC Feb 2012 to Jan 2014 - Actual vs. Regression Table 29 ......................................................... RCC RLTAC Regression Breakouts 2010 vs. 2013 Table 30 .............................................................................. End Use Disaggregation Percentages Table 31 ........ Roxbury Community College Dudley House Estimated Billing Data Using G2 Rate Table 32 ......................................... Roxbury Community College Dudley House Billing Break-out Table 33 .................................. RCC Dudley House Estimated NG Billing Data Using $1.50/therm Table 34 .................................................................................................... RCC Water Use Survey Table 35 .................................................................. RCC Buildings 1-4 Annual Gas Use and Cost Table 36 .............................................. RLTAC Natural Gas Usage Data 1/28/2012 to 12/31/2013 Table 37 .............................................................................. RCC RLTAC Natural Gas Billing Data Table 38 ....................................................... RCC RLTAC Natural Gas Usage Data 2007 to 2013 www.westonandsampson.com iii

Table 39 ...................................................... RCC RLTAC Natural Gas Regression Breakout 2013 Table 40 ................................................................................... RCC Energy and Water Cost Data Table 41 .................................................................... RCC Campus – Energy Use Cost Summary Table 42 ...................................................................... RCC RLTAC – Energy Use Cost Summary Table 43 .................................................................... Dudley House – Energy Use Cost Summary Table 44 ................................................................................................................. RCC Utility Bills Table 45 ....................................................................................... RCC Existing Lighting Summary Table 46 ......................................................................................... RCC Lighting Retrofit Option A Table 47 ......................................................................................... RCC Lighting Retrofit Option B Table 48 ......................................................................................... RCC Lighting Retrofit Option C Table 49 ............................................................................ Academic Building Exhaust Hood Data Table 50 ............................................................................. Electric Water Heaters – Buildings 1-4 Table 51 ................................................................. 7 ½ HP Boiler Circulation Pump VFD Analysis Table 52 ...................................................................... Academic - Fan VFD Savings Calculations Table 53 .............................................. Visual/Performing Arts – Building Constant by Component Table 54 ............................................. Administration Building – Building Constant by Component Table 55 .................................................... Academic Building – Building Constant by Component Table 56 ......................................................... Student Center – Building Constant by Component Table 57 .............................................................. RLTAC Gym– Building Constant by Component Table 58 .............................................................. RLTAC Gym– Building Constant by Component Table 59 ........................................................... Dudley House – Building Constant by Component Table 60 ................................................................ Clean Refrigeration Coils – Savings Estimates Table 61 ............................................................................................ Conceptual Solar PV Project Table 62 ............................ Building 5, RLTAC Weather Regression Hot Water Demand from NG Table 63 .................................................. Building 5, RLTAC Hot Water Usage Per Day by Month Table 64 ............................................................................ Estimated Hot Water Demand for RCC Table 65 ............................................................................. Solar Hot Water Project Cost Estimate Table 66 .............................................................................. Comparison of Alternative Fuel Costs Table 67 ................................................................................... Solar Hot Water Project Estimates Table 68 ...................................................... Roxbury Community College – ECM Summary Table

LIST OF APPENDICES

Appendix A ................................................................. Field Notes, Observations and Calculations Appendix B ........................................................................ DCAMM Audit Template Spreadsheets Appendix C ............................................................................................................ Lighting Details Appendix D ...................................... Boston Water and Sewer Commission Abatement Guideline Appendix E ............. Renewable Energy Conceptual System Layouts and Economic Calculations Appendix F ..................................................................................... Project Coordination Summary www.westonandsampson.com iv

LIST OF ABBREVIATIONS

ABS Automated Building Systems Inc.

ACU Air Conditioning Units AEP Accelerated Energy Program AHU Air Handling Unit ASHRAE American Society of Heating, Refrigeration and Air Conditioning Engineers ASTM American Society for Testing and Materials BC Building Constant CDD Cooling Degree Days CFM Cubic Feet per Minute CMR Code of Massachusetts Regulation DCAMM Division of Capital Asset Management and Maintenance DDC Direct Digital Control DHW Domestic Hot Water DMS Decimal, Minute, Second DX Direct Expansion ECM Energy Conservation Measure EMS Energy Management System ESCO Energy Services Company FERC Federal Energy Regulatory Commission Ft. feet gpf Gallons Per Foot HDD Heating Degree Days HID High Intensity Discharge HPS High Pressure Sodium HVAC Heating, Ventilation, and Air Conditioning kV kilovolts kVA kilovolt Amperes kVAr kilovolt-amperes reactive kW kilowatt kWh kilowatt-hours LED Light Emitting Diode MASS GIS Massachusetts Office of Geographic and Environmental Information System M.D.T.E Massachusetts Department of Telecommunications and Energy MMBtu Million British Thermal Units mph miles per hour ms meters per second MW megawatt OA Outside Air RCC Roxbury Community College RF Return Fan RFL Reflective Flood Light RLTAC Reggie Lewis Track and Athletic Center rpm revolutions per minute RTU Roof Top Unit V Volt VAV Variable Air Volume VFD Variable Frequency Drive WSHP Water Source Heat Pump www.westonandsampson.com v

EXECUTIVE SUMMARY

Weston & Sampson, on behalf of the Division of Capital Asset Management and Maintenance (DCAMM) and Roxbury Community College (RCC), completed an energy and water feasibility study for the six buildings comprising the RCC campus located at 1234 Columbus Avenue, Boston, MA. Weston & Sampson has conducted an American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) Level II energy audit, a water use audit and an existing condition assessment that will serve as the basis for funding of construction of future projects wholly or partially on the amount of energy and cost savings.

The objective of the audit and assessment is to identify Energy Conservation Measures (ECMs), water conservation measures, and renewable energy systems that will maximize net present value of the facility over a decade or two; and to develop each concept such that a design/build contractor could complete the design and install the recommended ECMs. The goal of the ECMs are to reduce energy consumption by 60-70% of the overall baseline energy usage when all proposed work at the site is complete and to receive Accelerated Energy Program (AEP) certification, which may include installing renewable energy to assist in meeting the reduction goals. To become AEP certified, an individual site must achieve a minimum reduction in two of the following three categories: site energy use, greenhouse gas emissions, and energy costs.

The baseline energy use at RCC is as follows:

Table 1 RCC Baseline Energy Summary

Building Description

Annual Baseline w/o Water [MMBtu]

Annual Baseline w/o

Water [$]

Annual Baseline

Water [Gallon]

Annual Baseline Water [$]

Total Annual

Baseline[$]

Building 1 3,081 $106,381 138,380 $1,964 $108,345

Building 2 1,769 $79,430 67,320 $940 $80,370

Building 3 11,844 $404,870 1,861,024 $30,308 $435,715

Building 4 2,521 $102,832 474,980 $7,027 $109,859

Building 5 8,668 $102,210 907,698 $13,811 $173,777 Building 6 817 $8,933 540,782 $6,801 $23,751 Total 28,700 $804,656 3,990,184 $60,851 $931,817

The total cost of water and energy use at RCC (excluding Dudley House) is on the order of $908,065 per year. The current carbon footprint of RCC (excluding Dudley House) is 5,427 tons of carbon per year (EPA).

Water and energy conservation measure recommended at RCC include: 01.00 Lighting; 04.00 Energy Management Systems; 05.00 Domestic Water; 06.00 Sewer Conservation; 09.00 Variable Frequency Drives; 11.00 Vending and Plug Load Controllers; 14.00 Boilers; 15.00 Chillers; 19.00 Real-Time Metering; 21.00 Renewable Energy Systems; 22.00 Misc. Specialty Equipment, and; 23.00 Other Recommendations. The recommendations include replacement of selected mechanical equipment that is at or near the end of its useful life.

www.westonandsampson.com vi

Recommended water and ECMs, including renewable energy systems (solar PV, solar thermal and geothermal GSHPs), are estimated to cost on the order of $12 million and generate revenue and cost savings on the order of $860,000 per year, yielding a simple payback of 13.1 after estimated utility rebates and incentives of $665,000 for all of the recommended water and ECMs. The following table is a summary of the project costs by building which are recommended for the RCC campus:

Table 2 Summary of Recommended ECMs by Building at RCC

Building # Estimated

Gross Project Cost ($)

Estimated Rebates and Incentives ($)

Estimated Net Project Cost ($)

Estimated Annual

Savings ($)

Simple Payback (years)

1 Media $2,136,298 $8,435 $2,127,863 $85,166 25.0

2 Admin $582,508 $7,800 $574,708 $29,966 19.2

3 Academic $5,145,596 $135,790 $5,009,806 $290,619 17.2

4 Student $3,734,446 $482,580 $3,251,866 $414,728 7.8

5 RLTAC $340,707 $30,195 $310,512 $38,593 8.0

6 Dudley NA NA- NA NA NA

Total $11,939,555 $664,800 $11,274,755 $859,072 13.1

Recommended water and ECMs are estimated to save: 381,227 gallons of water (11%); 16,202 MMBtu of energy (58%), and; $859,071 (95%) annually, including the sale of renewable energy certificates from the solar PV production. A table summary of the ECMs for the RCC campus is presented below.

Table 3 RCC Summary of Recommended ECMs

Energy Conservation Measure

Cost Annual Savings

Estimated Install Cost

Utility Incentive

Energy [MMBtu]

Water [Gallon]

Cost [$] Simpl e PB [yrs]

01.00 Lighting $541,087 $107,215 1,406 0 $45,343 9.6

04.00 Energy

Management System $2,126,200 $11,000 6,214 0 $220,903 9.6

05.00 Domestic Water $140,597 $- 0 381,227 $21,381 6.6

06.00 Sewer

Conservation $2,500 $- 0 0 $3,400 0.7

09.00 Variable

Frequency Drives $15,000 $9,750 138 0 $3,003 1.7 www.westonandsampson.com vii

RCC Summary of Recommended ECMs

Energy Conservation Measure

Cost Annual Savings

Estimated Install Cost

Utility Incentive

Energy [MMBtu]

Water [Gallon]

Cost [$] Simpl e PB [yrs]

11.00 Vending and Plug

Load Controllers $2,090 $915 41 0 $846 1.4

14.00 Boilers $943,500 $10,000 371 0 $22,158 42.1

15.00 Chillers $259,800 $- 14 0 $280 927.9

19.00 Real-Time

Metering $41,000 $- 547 0 $15,734 2.6

21.00 Renewable

Energy Systems $5,820,600 $525,920 7,116 0 $504,827 10.5

22.00 Misc. Specialty

Equipment $2,033,101 $ - 116 0 $8,320 244.4

23.00 Other

Recommendation s by Proposer $14,080 $- 239 0 $12,876 1.1

Total $11,939,555 $664,800

16,202

381,227 $859,071 13.1

RCC has suggested that adding A/C to the Reggie Lewis Track and Athletic Center (RLTAC) field house could increase summer time utilization of the facility to host events. The amount of A/C is dependent not only on the size and volume of space to be cooled and conditioned, but also the anticipated occupant load, activities and corresponding ventilation rates. While adding air conditioning is not considered an energy efficiency measure in the classic sense, increasing the utilization of the facility as a whole is more efficient than constructing a separate facility increasing the building utilization. At RCC’s request, we estimate adding air conditioning combined with new gas-fired indoor AHUs to replace the existing H&Vs to the RLTAC is estimated to cost on the order of $1.5 million.

Division o Roxbury C Energy an www.weston

Weston &

(DCAMM

the six b located a The wor

DCAMM’

Water Commun Contract Advisory

CAMIS C

The obje identify E and wate each con recomme energy u as install site must greenhou

The Lev Condition workboo existing c list of E appropria

Weston & EMS, lig approxim Columbu Boston, M

Bui

Bui Bui Bui Bui

Tot of Capital Asse Community Co nd Water Feas nandsampson.co

& Sampson M) and Roxb buildings co at 1234 Colu rk was perf ’s Request f Consulting nity College

# DCP0

Services, Code: RCC0 ective of the Energy Cons er conserva ncept such ended ECM sage when ing any rene t achieve a m use gas emi el II Energy ning Engine k using the condition as ECMs and ate for consi

& Sampson ghting, and mately 356,8 us Avenue ( Massachuse ilding No.

lding – 1 lding – 2 lding – 3 lding – 4 lding – 5 lding – 6 al et Managemen ollege ibility Study om

1.0 I

, on behalf bury Commu omprising th umbus Aven formed in a for Proposal

Services e dated Oct

0711-EX1,

Project #: R 0.

audit and a servation Me tion measur that a desi

Ms, with goa all proposed ewable ener minimum red ssions, and y was base eers (ASHRA current vers ssessment, t renewable deration at t was assiste lighting con 49 square fe (Tremont St etts. The bui

Name

Visual/P Adminis Academ Studen Reggie Dudley nt and Mainten

NTRODUCT

of the Divisi unity College he RCC cam nue, Boston, accordance s for Energy for Rox tober 28, 2 Facility En

RCC1301E

assessment easures (EC res and dev gn/build con al of reducin d work at the rgy to assist duction in tw energy cost ed on the A AE) Level I sion of DCA three year b energy an the facility.

ed by ABS I ntrols. The eet of space reet north o ldings includ

Roxbury C

Performing A stration mic t Center Lewis Trac House nance (DCAM

1-1

TION AND B

ion of Capita e (RCC), co mpus

, MA.

with y and xbury 2013.

nergy

ES1,

is to CMs) velop ntractor cou ng energy c e site is com in reduction wo of the foll ts.

American So II, of the six

AMM audit te baseline, util nd/or innova

nc. as a sub RCC camp

e. All of the b of Malcom X ded in this ev

Table 1 ommunity C

Arts k and Athlet

Figure

M)

BACKGROU

al Asset Ma ompleted an uld complete consumption mplete to rece

n. To become lowing three ociety of He x buildings, emplates for lity analysis, ative techno bconsultant pus encomp buildings are X Boulevard valuation co

College tic Center e 1 – Project L

UND

anagement a n energy an e the design n by 60-70% eive AEP ce e AEP certif e categories:

eating Refri completion r documenti , developing ology asse to assist in passes six b e located on

d) in the Ro onsisted of th

Siz

7,8

Location

March and Mainten d water aud n and insta % of the ov ertification as fied, an indiv : site energy geration an n of facility ng and repo g of a prelim ssment dee the evaluati buildings tot n the east si oxbury sectio he following:

ze (sqft)

3,744 4,480 33,320 8,832

3,068

51,249 h 2015 nance dit for ll the verall s well vidual y use, d Air audit orting minary emed ion of taling ide of on of www.westonandsampson.com 1-2

Note that the square foot values differ from the values in DCAMM’s CAMIS database as our estimates are based on net square footage of the conditioned space, and measurements and calculations made from review of building plans. Our estimates of building square footage does not have an impact on the effectiveness of any particular ECM, but only when comparing cost-effectiveness on a square foot basis. Our estimates and assumptions on what space is considered (i.e. attic, basement, atrium, mechanical closets, elevator shafts, etc.) and assumptions made based our field observations are included in Appendix A.

Figure 2 – Campus Map www.westonandsampson.com 2-3

2.0 EXISTING CONDITIONS ASSESSMENT

A walk through of the property was performed by Weston & Sampson and Automated Building Systems Inc. from February 18, 2014 through February 27, 2014. During these site visits, the general condition of the buildings was noted. Also evaluated were the existing equipment including Heating, Ventilating, and Air Conditioning (HVAC) systems, Domestic Hot Water (DHW), lighting, the Energy Management System (EMS), and miscellaneous equipment. The current operation of the buildings was also evaluated. These areas are described below in further detail. This assessment is not intended to review structural or architectural conditions as these details were addressed in other reports.

2.1 Visual/Performing Arts Building

2.1.1 Facility Description

The Visual/Performing Arts Building is located at 1234 Columbus Ave. It was constructed in 1988 along with the other three buildings which make up the main part of the campus. This building contains an auditorium/theater which is two stories high. The building contains a media center, several private rooms for musical instrument lessons and practice, private offices, classrooms for arts, ceramics and theater prop production, and a dance hall that is often used as a meeting room. The overall square footage of the building is estimated at 33,744 square feet.

The estimate does not count the 3rd floor outside deck area or area on the second floor occupied by the lobby or the auditorium. It does include the basement area. The exterior of the building is red brick and concrete masonry. The building construction is concrete blocks with metal studs. The roof is a combination of pitched metal along the sides and flat in the center. Windows are fixed in common areas such as halls and stairwells, and are operable in classrooms and office, double-pane with aluminum frames.

2.1.2 Energy Management System

There is an existing Direct Digital Control (DDC) American Auto-Matrix building management system. It appears to be operating and functioning correctly and controls three air handling units and 24 VAV boxes. The cooling tower controls are not functioning properly. The tower is controlled manually by maintenance personnel. There is a master time schedule 7 days a week from 6 AM to 9 PM. The Visual/Performing Arts Building is the only building with a working Auto- Matrix system.

Figure 3 - Visual/Performing Arts Building www.westonandsampson.com 2-4

Visual/Performing Arts Building – Existing Controls

Unit # Description Schedule Space

Setpoint ACU 6 & 7 AHU w/ Inlet Valve 7 days/week 6AM to 9 PM NA ACU 8 Constant Volume AHU 7 days/week 6AM to 9 PM 66 deg Cooling Tower Pumps

Cooling Tower w/ VFD Pumps 24/7 Manual Mode NA

(17) VAV Boxes Cooling Only VAV Boxes 7 days/week 6AM to 9 PM 64-71deg

(7) VAV w/ Reheat

VAV Boxes w/ Electric Reheat 7 days/week 6AM to 9 PM 64-71deg

2.1.3 Heating, Ventilating, and Air Conditioning (HVAC) Systems

The Visual/Performing Arts building has its own HVAC system consisting primarily of electric resistance heat in the form of baseboard and heaters in Variable Air Volume (VAV) boxes and air handlers. The cooling is supplied by direct expansion (DX) coils in the mechanical air handlers and condenser heat is rejected by a cooling tower.

The HVAC system in Visual/Performing Arts Building consists of DX Air Conditioning Units (ACU) 6 & 7, which are VAV air handling units sharing one return fan. These units serve the basement through 3rd floor VAV boxes. There are three electric duct heaters that provide the heat for the building as well some electrical radiation. Variable pitch inlet guide vanes are utilized to modulate airflow and maintain duct static pressure. These units have enthalpy economizer capability. The input/output values appear to be accurate and operating properly on the Auto-Matrix Energy Management System (EMS).

ACU-8 is a constant volume air handling unit with multiple return air isolation dampers that serves the theater. These units have dual enthalpy economizer capability and electric duct heaters and DX for cooling. The return air damper is not working properly and is locked in the open position; therefore, the unit is not able to properly economize as it allows 100% outside air in all the time and does not modulate relative to cooling needs.

There are (24) VAV boxes with electric reheat coils being controlled by the Auto- Matrix system. Space temperature set points vary from 67 to 72 degrees. The system has heating and cooling night setbacks. There is a master time schedule in place programmed as “occupied” from 6 AM to 9 PM, five days a week, and then 9 AM to 9 PM on weekends.

Figure 4 - VAV AHU unit. (Controls panel is off and only one stage of cooling is operable.)

www.westonandsampson.com 2-5

The cooling system consists of a DX coil, a water cooled condensing unit, and a 250 ton cooling tower. The cooling tower water pumps are fitted with Variable Frequency Drives (VFD’s). The condenser water system is controlled properly by the EMS. There are four exhaust fans that are part of the EMS. The exhaust fans are operating normal under time schedules from the EMS.

The building cooling tower is a hybrid closed loop for building side of the system and open evaporative at the tower side.

The make-up and bleed down water supply is metered, but the bleed down is not metered. An additional meter for the drain will save on waste water costs as the waste water is billed on supply/use.

2.1.4 Domestic Hot Water

Domestic hot water is supplied from an original 120 gallon, 15 kW, Hubbell SE120-0-15CST4 hot water tank. There are signs of rust at the bottom of the tank indicating that the tank may be near the end of its useful life.

Figure 6-8 – Hot Water Tank

Figure 5 – Cooling Tower www.westonandsampson.com 2-6

2.1.5 Lighting Systems

There are approximately 425 light fixtures in the Visual/Performing Arts Building, of which 242 are linear fluorescents. The majority of them are T8 lamps with electronic ballast. The lamps and fixtures are in good condition. The standard classroom fixture is a 3 lamp, 32 Watt, 4 foot, T8 2X4 parabolic troffer. The standard hallway fixture is a 3 lamp, 2 foot, F17 T8 2X2 parabolic troffer. The stairwells, restrooms, lobby, mechanical and store rooms have 4 foot, 2 lamp fixtures of various designs. These fixtures account for 56% of the total fixture count. Compact fluorescent cans make up 15% of the fixtures. LEDs, located in the theater, make up 10% of the total building lighting. Incandescent stage floods and specialty lamps make up 12%. An economic evaluation of converting all the fluorescent lighting to LEDs will be presented. The lighting levels measured in the offices and classrooms averaged about 35 foot-candles. For most office and classroom environments, the recommended light level is 50 foot-candles.

Table 2 Visual/Performing Arts Building - Interior Lighting Summary*

Type Location Qty Type Total

Wattage Existing Wattage

Hours/yr

Schedule op

18w led Theater 30 Ceiling 18 540 4,383 5% 500w Stage lights 30 500 15,000 4,383 5% 8w led Theater 12 Sconce 8 96 4,383 5% CFL-15 Hallway 10 Cans 19 190 4,383 100% CFL-20 Hallway 4 Cans 23 92 4,383 100% CFL-25 Hallway 38 Cans 29 1,102 4,383 100% CFL-32 Hallway 6 Cans 34 204 4,383 100%

F15T12-1 Elevator 3 Open 17 51 8,760 100% F17T8-3 Hallways 62 Parabolic 46 2,852 4,383 100% F30T8-1 Bathrooms 9 Open 26 234 4,383 20%

F32T8-2 Support areas 78 Assorted 60 4,680 8,760 30%

F32T8-3 Class/office 86 Parabolic 90 7,740 4,383 75% F40E-1 Elevator 4 Open 50 200 8,760 100%

I60 Room 001 3 60 180 4,383 2%

LED

Exits Exit Signs 23 Exit Signs 2 46 8,760 100%

PL13-2 Bathrooms 7 Cans 30 210 4,383 20%

RFL65

Sound Studio 20 Recessed 65 1,300 4,383 5%

2.2 Ad

2.2.1 F

The Adm 1234 C construct main pa consists the RC building dimensio three flo estimated square f any attic building masonry concrete roof is a along th Windows areas su fixed, wh frames.

2.2.2 H

A centra respectfu Administ building, between located t outside a of Capital Asse Community Co nd Water Feas nandsampson.co dministratio acility Descr ministration B Columbus A ted in 1988 rt of the ca of offices a

CC adminis is rectang ons of 120 f oors high d square foo foot estimat c space. T is red b . The build blocks wit a combinati e sides and s on the firs ch as stairw hile upper l

Heating, Ven l, 840 kW e ully as the lo ration build Student Ce the three bu hroughout th air to each of et Managemen ollege ibility Study om n Building ription

Building is lo Ave. It w 8 and is pa ampus. This nd meeting stration sta ular in sha feet by 68 f and has otage of 24, te does no The exterio brick and ding constr th metal stu on of pitch d flat in th st floor and wells and hall evel, classr tilating, and electric boile oop tempera ing is a wa enter and Ac uildings to p he buildings f the WSHPs nt and Mainten ocated at was also art of the s building areas for aff. The ape with feet. It is a total

480. This ot include r of the concrete ruction is uds. The ed metal e center.

common lways are rooms and

Air Conditio r and 560 to ature varies ater source cademic buil provide a hea . The buildin

s. Below is a

F nance (DCAM

2-7 offices are oning (HVAC on cooling t from the de heat pump ldings share at source or ng has an ai a depiction o

Figure 9 – Adm

M) operable, d

C) Systems tower are us esired range p (WSHP) e a common r heat sink fo ir handler th of how the sy ministration B double pane sed to add a

e. The HVAC system. Th n water loop or the heat p at provides ystem can s

Building

March e with alum and remove C system fo e Administr p which circu pumps whic ducted temp share BTUs.

h 2015 minum heat or the ration ulates ch are pered

The Mai tower is between Academi provides Administ Center b of its use Our estim cooling t Arts bu gallons o and blee should co meters a bill costs assuming as treate

Conceptu

Community Co nd Water Feas nandsampson.co n Campus s located the Admi c buildings.

condensing rative, Acad uildings. It h eful life and mates indica tower for the uilding co of water per ed down fun onsider insta as the Bosto s are based g all water ed sewage.

ual Central He et Managemen ollege ibility Study om heat pump above a w inistrative a This coolin g loop coolin demic and has reached should be re ate that this e Visual/Pe nsume 1, year by eva nctions. The alling feed a on water an on supplied supplied is eating and Coo nt and Mainten cooling walkway and the ng tower g for the Student the end eplaced.

and the rforming 226,000 poration e school nd drain d sewer d water, drained Fi oling Units nance (DCAM

2-8 gure 10 – Coo

M) oling Tower

March h 2015 www.westonandsampson.com 2-9

The cooling tower fan shaft is at the end of its life. The tower fan motor is manually controlled by maintenance personnel. The Main Campus Cooling Tower Cell 1 and 2 fans are rusted out and do not function.

The HVAC in the Administration Building consists of ACU-3, which is a constant volume 100% outdoor air unit with DX coil for cooling and hot water coil for heating. This unit serves as ventilation and fresh air for the spaces served by the heat pumps for all three floors of the Administration Building. The system is currently not operating at all. No fresh air is being supplied to the plenum for the heat pumps without being tempered. The individual heat pumps provide all the heating and cooling for the building.

Figure 11 – Cooling Tower Fan Shaft www.westonandsampson.com 2-10

Since the EMS system is not working for the Academic building, the heat pumps are used for all of the heating and cooling. The heat pumps are part of the Auto-Matrix system, but are currently running in manual mode 24/7. There are 30 heat pumps throughout the building

Building pressurization appears to be part of the EMS, but there are not any recorded values or signs that the system is operating properly.

There are two exhaust fans (EF) that are part of the EMS system, which do appear to be operating properly. EF-33 runs off a time schedule, and EF-34 runs off of space temperature.

Electric baseboard radiation is used for supplemental heat on exterior walls on the first floor only. These heaters are being controlled by stand-alone thermostats and are not on the EMS system. The radiation is not being controlled in sequence with the heat pumps serving the same zones, therefore simultaneous heating and cooling is taking place.

Table 4 Administration Building – Electric Base Board Heaters Not on the EMS

Location Length in Ft Baseboard

Existing Wattage/Ft Quantity

Total Wattage

Total kW

1st Floor 10 250 14 35,000 35 3rd Floor 20 250 10 50,000 50

Total 85,000 85

2.2.3 Domestic Hot Water

The Administration building hot water is supplied by a single, 52 gallon 9 kW, SE52-0-9CST4 electric heater. There is no recirculation loop so the users may have to wait for the hot water to get to the faucet.

Figure 12 – Water Source Heat Pump (typical)

Figure 13 – Water Heater -Administration Building www.westonandsampson.com 2-11

2.2.4 Lighting Systems

There are 273 light fixtures located throughout the Administration building, of which, 220 are linear fluorescents. The majority of these are T8 lamps with electronic ballast. The lamps and fixtures are in good condition. The standard classroom fixture is a 3 lamp, 32 Watt, 4 foot, T8 2X4 parabolic troffer. The standard hallway fixture is a 3 lamp, 2 foot, F17, T8 2X2 parabolic troffer. The stairwell, restroom, lobby, mechanical and store rooms have 4’ 2 lamp fixtures of various designs. These fixtures account for 81% of the total fixture count. Compact fluorescent cans make up 12% of the fixtures. Two fixtures are LED floods in cans and 12% of the fixtures are incandescent candelabra. LED exit signs make up 2% of the building lighting. An economic evaluation of converting all the fluorescents to LEDs will be presented. The lighting levels measured in the offices and classrooms averaged about 35 foot-candles. For most office and classroom environments, the recommended light level is 50 foot-candles.

Table 5 Administration Building - Interior Lighting Summary*

Type Location Qty Type Total Watts

Existing Wattage

Hours/yr

Schedule op

CFL-15 Hallways 17 Cans 19 323 4,383 100% CFL-20 Hallways 9 Cans 23 207 4,383 100% CFL-25 Hallways 8 Cans 29 232 4,383 100%

F15T12-1 Elevator 2 Open 17 34 8,760 100% F17T8-3 Hallways 23 Parabolic 46 1058 4,383 100% F30T8-1 Elevator 1 Open 26 26 8,760 100% F30T8-2 Elevator 1 Open 52 52 8,760 100% F32T8-2 Support 33 Open/wrap 60 1980 8,760 30% F32T8-3 Class/office 149 Parabolic 90 13410 4,383 75%

F32T8U-2 Hallway 11 Parabolic 60 660 4,383 100% Globes Lobby 10 Globe 20 200 4,383 100%

I75 Boardroom 1 Can 75 75 4,383 5% LED Exits Exits 6 Exit Signs 2 12 8,760 100% LED Flood Hallway 2 RFL 17 34 4,383 100%

2.2.5 Energy Management System

There is an existing American Auto-Matrix energy management system. Control wires appear to have been pulled for each piece of HVAC equipment, but have not been terminated; therefore, none of the equipment is being controlled by the EMS. The air handling unit (ACU-3) has been down since the system was partially installed causing units to run 24/7 in manual mode. The heat pumps are being run manually for heating and cooling. There are electric radiation heaters throughout the building which total an estimated 85 kW which are being controlled by a manual thermostat.

www.westonandsampson.com 2-12

Table 6 Administration Building – Existing Controls

Unit # Description Schedule Space

Setpoint ACU 3 100% OA Constant Volume AHU 24/7 Manual Mode NA Building Pressure Building Pressure Control NA NA EF-33 Exhaust Fan 33 24/7 Manual Mode NA EF-34 Exhaust Fan 34 NA 80 deg

(30) Heat Pumps Heat Pumps 24/7 Manual Mode NA

2.3 Academic Building

2.3.1 Facility Description

The Academic building is located at 1234 Columbus Avenue, and it is the third building in the main part of the campus. It was built in 1988 and contains mostly classroom areas. There are two main wings of the building, each with a footprint of 170 feet by 58 feet and five floors high. A center section of the building connects the two wings. The total square footage of this building is estimated at 133,320 square feet, excluding attic space. The exterior of the building is red brick and concrete masonry. The building construction is concrete blocks with metal studs. The roof is a combination of pitched metal along the sides and flat in the center. Windows on the first floor and common areas such as stairwells and hallways are fixed, while upper level, classrooms and offices are operable, double-pane with aluminum frames. The building contains a café on the first floor.

2.3.2 Heating, Ventilating, and Air Conditioning (HVAC) Systems

The HVAC systems in the Academic building consists of ACU-1 and ACU-2, which are identical constant volume 100% outdoor air units with DX cooling and electric duct heating coils. ACU-1 serves the WSHPs on the north side of the building, and ACU-2 serves the heat pumps on the south side of the building. The system is currently not operating on the Auto-Matrix head end.

These units do not run at all, and have not been supplying fresh and tempered air to the plenum for the heat pumps.

AHU-1 is variable air volume unit using inlet guide vanes on the supply fan, and a bypass damper to maintain static pressure based on lab hood operation. The unit is electric heat only.

The unit is currently not communicating or operating on the EMS system. The system does not

Figure 13 – Academic Building run prope air causin

ACU-5 s with a hu unit is cu provided or manua facilities

The wate kW elec condense cell cooli in opera Pump P does not has 14 s are part that doe Stages water s WSHP lo commun EMS sys

The WSH Academi Auto-Mat througho some ca are cont thermost

There ar control. T EMS, bu negative cracks ar

Electric b only. The system. T zones, th nd Water Feas nandsampson.co erly with the ng a negativ erves the 1s umidifier, an urrently not c by the WSH ally turned o department.

er loop con ctric boiler er water pu ng tower. O tion and ru -1 has a V t operate. T stages of 60 of the boile es not resid would be supply tem oop system icating or o stem.

HPs are use c building. T trix system, out the build ses they wil trolled by o tats.

re five exhau They are run ut there aren ly pressuriz round the bu baseboard r ese heaters The radiatio herefore sim et Managemen ollege ibility Study om e lab hood ex ve pressure e st and 2nd f nd electric re communicat HPs in the s on and off b nsists of one , two 125 umps, and a Only pump, P ns at full s VFD installe The electric 0 kW each, r control pac de on the based on mperature.

m is currentl operating o ed for most o The WSHPs but are cu ding. Some l be heating one thermos ust fans that nning 24/7 in n’t any reco ed it can c uilding as we radiation is are being c n is not bein ultaneously nt and Mainten xhaust fans effect in the floor of the eheat coils.

ting or opera space, by the e 840

5 HP

a two- P-2, is speed.

ed but boiler which ckage

EMS.

boiler

The ly not n the of the heating are part of t rrently runn rooms have and cooling stat creating t are part of n manual mo rded values cause poten ell as other p used for su controlled by ng controlled heating and

Figur nance (DCAM

2-13 and lab hoo building.

library. It’s a The unit ha ating on the g/cooling du the main loo ing in manu e multiple h g simultaneo g a lack of the EMS sy ode. Building s or signs of tial cold dra potentially ha pplemental y stand-alon d in sequenc d cooling is t re 14 – Typica

M) od exhaust f a constant v as dual enth

EMS syste ue to the EM op described ual mode 24 heat pumps ously. In som f temperatu ystem, but a g pressurizat f it operatin afts to be d armful safety heat on ex ne thermosta ce with the h aking place.

al Heat Pump fans operate volume unit, halpy econom

m. All heatin

MS system no d above and 4/7. There a serving the me instances re control i are not oper tion appears ng properly.

drawn in thr y concerns.

xterior walls ats and are heat pumps s

March e without ma with DX co mizer mode ng and cool ot working fo connected t are (30) WS e spaces, a s, multiple ro in areas wi ating under s to be part o If the buildi rough doors on the first not on the serving the s h 2015 akeup ooling . The ing is or the to the SHPs nd in ooms ithout

EMS

of the ing is s and floor

EMS

same www.westonandsampson.com 2-14

Table 7 Academic Building – Electric Base Board Heaters Not on the EMS

Location Length in Ft Baseboard

Existing Wattage/Ft Quantity

Total Wattage

Total kW

1st Corridor 10 250 12 30,000 30 1st Corridor 20 250 2 10,000 10

Total 40,000 40

2.3.3 Domestic Hot Water

The DHW is supplied by two 130-gallon, 9 kW SF130-0-9CST4 electric stand-alone water heaters. One, stand alone is inoperable and not used.

2.3.4 Lighting Systems

There are 1,399 light fixtures in the Academic building, of which 1,315 are linear fluorescents.

The majority of these are T8 lamps with electronic ballast. The lamps and fixtures are in good condition. The standard classroom fixture is a 3 lamp, 32 Watt, 4 foot, T8 2X4 parabolic troffer.

The standard hallway fixture is a 3 lamp, 2 foot, F17 T8 2X2 parabolic troffer. The stairwell, restroom, lobby, mechanical and store rooms have 4 foot, 2 lamp fixtures of various designs.

These fixtures account for 94% of the total fixture count. 3% of the fixtures are compact fluorescent cans. 3% are LED exit signs. An economic evaluation of converting all the fluorescents to LEDs will be presented. The lighting levels measured in the offices and

Figure 16 & 17 – Academic Building Water Heaters www.westonandsampson.com 2-15 classrooms averaged about 35 foot-candles. For most office and classroom environments, the recommended light level is 50 foot-candles.

Table 8 Academic Building - Interior Lighting Summary*

Type Location Qty Type Total

Wattage Existing Wattage

Hours yr

Schedule op CFL-20 Hallways 38 Cans 23 874 4,383 100% F17T8-3 Hallways 246 Parabolic 46 11316 4,383 100%

F32T8-2 Support Areas 68 Open/Wrap 60 4080 8,760 30%

F32T8-3 Class/office 818 Parabolic 90 73620 4,383 75% F32T8U-2 Library 183 Parabolic 60 10980 4,383 100% LED Exits Exits 46 Exit Signs 2 92 8,760 100%

2.3.5 Energy Management System

There is an existing American Auto-Matrix energy management system. Control wires have been pulled for each piece of HVAC equipment, but have not been terminated, therefore none of the equipment is under control of the EMS. All of the air handling units have been down since the system was partially installed causing units to run 24/7 in manual mode. The heat pumps are being run manually for heating and cooling. There are electric baseboard radiators that are on standalone thermostats. The Auto-Matrix system controls the following equipment:

Table 9 Academic Building – Existing Controls

Unit # Description Schedule Space

Setpoint ACU -1 100% OA Constant Volume AHU 24/7 Manual Mode NA ACU -2 100% OA Constant Volume AHU 24/7 Manual Mode NA ACU -5 Constant Volume AHU 24/7 Manual Mode NA AHU -1 AHU w/ Bypass Damper and Inlet

Vane 24/7 Manual Mode NA

(30) Heat Pumps Heat Pumps 24/7 Manual Mode NA Clg Tower/Pumps Cooling Towers 1&2 w/ VFD Pumps 24/7 Manual Mode NA Exhaust Fans Exhaust Fans 24/7 Manual Mode NA

2.3.6 Miscellaneous Equipment and Systems

There is a 250 kW back-up generator which is exercised 10 minutes per week. It is located outside, on the first floor of the Academic building behind the library. It supplies back up and emergency power.

www.westonandsampson.com 2-16

2.4 Student Center

2.4.1 Facility Description

The Student Center is the fourth building which makes up the main part of the campus. The address is 1234 Columbus Avenue and it was also built in 1988.