WWYK263009_65_NG_energy model results.pdf

Tinker BACH LCCA Model Inputs (6/07/23)

Total Cost Energy

Cost Index Natural Gas PCI

($/yr) ($/sf) Total Use Facility

Demand Total

Energy

Cost

PCI %

Baseline-90.1-2019 $319,769 $1.58 $319,769 $319,769 $0 $0 0.55

BaseProposed-NGAlt1 $174,750 $0.87 $163,889 $163,889 $0 $10,861 $145,019 0.2% 0.55

BaseProposed-NGAlt2 $167,056 $0.83 $157,251 $157,251 $0 $9,806 $152,713 4.5% 0.52

BaseProposed-NGAlt3 $178,602 $0.88 $157,520 $157,520 $0 $21,082 $141,168 -2.0% 0.56

BaseProposed-NGAlt4 $170,840 $0.85 $163,903 $163,903 $0 $6,938 $148,929 2.4% 0.53

SW-GI-Alt1-901-Baseline $314,375 $1.56 $312,791 $312,791 $0 $1,584 $5,394 -79.6% 0.98

SW-GS-Alt1-901-Baseline $314,147 $1.56 $312,791 $312,791 $0 $1,355 $5,623 -79.5% 0.98

SW-HX-Alt1-NGAlt1 $168,871 $0.84 $156,706 $156,706 $0 $12,166 $150,898 3.5% 0.53

PV Option $275,361 $1.36 $275,361 $275,361 $0 $0 $44,409 13.0% 0.48

Energy Use

Index Natural Gas Savings

(kBtu/sf*yr) Use

(kWh/yr)

Peak

Demand

(kW/mo)

Use

(therms/yr)

Peak Demand

(kW/mo)

Baseline-90.1-2019 72.4 4,280,947 2,842 0

BaseProposed-NGAlt1 50.3 2,194,081 436 26,716 2,406 30.5%

BaseProposed-NGAlt2 47.5 2,105,208 425 24,120 2,417 34.3%

BaseProposed-NGAlt3 61.3 2,108,811 423 51,858 2,419 15.2%

BaseProposed-NGAlt4 45.5 2,194,267 467 17,065 2,375 37.1%

SW-GI-Alt1-901-Baseline 72.7 4,187,522 2,840 3,896 3 -0.5%

SW-GS-Alt1-901-Baseline 72.4 4,187,522 2,840 3,334 3 -0.1%

SW-HX-Alt1-NGAlt1 50.3 2,097,911 398 29,926 2,444 30.5%

PV Option 62.3 3,686,372 2,842 0 0 13.9%

ENERGY COST RESULTS

Electricity Savings

ENERGY USE RESULTS

Energy Use

Electricity

1,000,000

2,000,000

3,000,000

4,000,000

5,000,000

6,000,000

7,000,000

8,000,000

A n n u a l

E n e r g y U s e k B tu

End Use

Baseline-90.1-2019 BaseProposed-NGAlt1 BaseProposed-NGAlt2 BaseProposed-NGAlt3 BaseProposed-NGAlt4

18.6%

8.8%

36.2%

4.9%

15.0%

12.2%

0.9% 3.5%

NG Alt 4 End Use Distribution

Heating

Cooling

Interior Lighting

Exterior Lighting

Interior Equipment

Fans

Pumps

Water Systems kBtu/sf

45.5

Tinker BACH LCCA Model Inputs (6/07/23)

General Proposed Baseline

Energy Code ASHRAE Standard 90.1-2019 Federal Guiding Principles and United Facilities Criteria (UFC)

ASHRAE Standard 90.1-2019 Appendix G

Input Source Design team inputs for

35% SD Set Dated 12/21/2023 Performance Rating Method

Climate Zone and Weather Location 3A, USA_OK_Oklahoma.City-Tinker.AFB.723540_TMYx.2007-2021 Same as Proposed

Elevation (ft) 1,198 Same as Proposed

Location Oklahoma City, OK Same as Proposed

Orientation from North 90 degrees Same as Proposed

Size (sf) Hangar: 138,798 GSF

Office/Workspace: 58,201 GSF Same as Proposed

Occupancy First shift: 280 to 360 people

Total: 400 to 515 people Same as Proposed

Schedule M-F 06:45 AM - 2:45 PM (Shift 1); 03:30 PM to 11:30 PM (Shift 2)

S/Sun: 04:45 AM - 12:45 PM Same as Proposed

Utility Rates Proposed Baseline

Electricity Oklahoma Gas and Electric (OG+E)

Main Base Rate for 2024: $0.07469/kWh Same as Proposed

Natural Gas Tiger Natural Gas

Main Base rate 2024: $4.06534/MMBtu ($0.406534/therm) Same as Proposed

Architectural Proposed (ASHRAE 90.1-2019 Code Min) Baseline

Roofs

Insulation Entirely Above Deck

Admin - 1/2" fiberglass mat gyp roof board on 5" polyiso above deck

Hangar - standing seam

U-0.032 (R-32 c.i.) (light colored roof)

Insulation Entirely Above Deck

U-0.063 (Table G3.4-3)

Reflectivity 0.30

Thermal Emittance 0.90

Walls, Above Grade

Hangar Upper - 4" insulated metal panel

U-0.059 (R-26)

Admin and Hangar Lower - insulated tilt up wall, 1/2" brick veneer, 2.5" concrete, 3" rigid insulation, 8" concrete, U-0.07 (R-15)

Steel-Framed

U-0.124 (Table G3.4-3)

Slab-On-Grade Floors Concrete slab

Unheated F-0.73

Unheated F-0.730 (Table G3.4-3)

Opaque Doors

Swinging: U-0.37 (1-3/4" insulated HM doors R-6)

Nonswinging: U-0.31 (insulated steel) (Kalwall)

Hangar Doors: U-0.04 (R-26)

Swinging: U-0.700 (Table G3.4-3)

Nonswinging: U-1.450 (Table G3.4-3)

Window Assemblies

Admin: Aluminum Storefront - 1" tinted/tempered low-e, double pane

U-0.33 (COG), SHGC-0.25, VT-0.275

Hangar: Thermally broken insulated translucent fiberglass sandwich panels, 2-3/4" min

U-0.29 max (COG), VLT-0.27 min

Window Type (Table G3.4-3)

U-0.57, SHGC-0.39, VT-0.43 if WWR ≤ 10.0%

U-0.57, SHGC-0.25, VT-0.28 if WWR > 10.0%

Window to Wall Ratio (%) From model: 12.1% From model: 12.1% (the calculation is more complex, see G3.1.1-1)

Exterior Shading Southern shading NA

Interior Shading Rolling shades

Infiltration (cfm per sf exterior area)

0.046 (admin), 0.16 (hangar)

For modeling purposes, have to set I to 1.0 cfm/ft2 at 0.3 in. w.g. delta-P, unless I is measured, i.e. Iadjusted = 0.226 cfm/ft2 to match Baseline, per

90.1-2019 Appendix G required infiltration modeling (see G3.1.1.4)

I = 1.0 cfm/ft2 at 0.3 in. w.g. delta-P (see G3.1.1.4 for conversion):

Roof = 183,692 ft2; AGW = 180,402 ft2

==> S = 364,094 ft2

==> IAGW = 0.112 x I75Pa x S / AAGW = 0.226 cfm/ft2 @ 10 mph

Electrical Proposed Baseline

Interior Lighting Power (W/sf)

110 kVA total

Building Area Method

- Office: 0.64 W/sf

- Hangar: 0.75 W/sf

XX kW total

Building Area Method (Table G3.8)

- Warehouse: 0.80 W/sf; Office: 1.00 W/sf

(Space by Space Method from Table G3.7

- Office: 1.10 W/sf; Warehouse: 0.90 W/sf)

Interior Lighting Daylighting Controls 90 kVA with daylight control (UFC min)

Control type (office/admin all spaces, hangar)

N/A

Interior Lighting Occupancy Controls

Every space, dimming, (occ/vacancy controls) except mech/elec Occupancy sensors in employee lunch and break rooms, conference/meeting rooms, and classrooms (not including shop classrooms, laboratory classrooms, and preschool-12th grade classrooms) (see Table G3.1-6). Credit in Proposed for occupancy sensors in other spaces than those listed above

Exterior Lighting Power (W)

30 kVA (TBD) Tradable: per Table G3.6

Nontradable: same as Proposed

No detail yet on Tradable or not, so Baseline modeled same as

Proposed

Exterior Lighting Controls Astronomical clock and sensor Astronomical time switch

Process Lighting 30 kVA Same as Proposed

Receptacle Loads (W/sf)

Total: 480 kVA

IT Room: 5.5

Breakroom: 1.0

Closed Office: 1.575

Conference Room: 1.05

Corridor: 0.21

Electrical/Mechanical Room: 0.21

Open Office: 1.575

Restroom: 0.21

Shop: 1.15

Warehouse/Storage: 0.22

Same as Proposed

Receptacle Controls ASHRAE recommended controls

10% credit in Proposed if receptacle control not required by Section

8.4.2 of 90.1

Conveyance (Elevator, Escalator)

Service Elevator: 25 hp

Motor type (hydraulic or traction):

Weight of elevator car (lb):

Rated elevator load (lb):

Speed of elevator (ft/min):

Counterweight of car (lb):

Pmotor = bhp x 746/hmotor bhp = (Weight of Car + Rated Load - Counterweight) x Speed of

Car/(33,000xhmechanical)

See Table G3.1-16

No detail on elevator yet, so same as Proposed

Process Loads Aircraft power: 1500 kVA

Hangar: assume something reasonable Same as Proposed

Mechanical Proposed Baseline

Setpoints

Occupied: 76 F clg, 68 F htg (admin); 65 F (hangar, considered as shop due to occupancy); 65 F (shop)

Unoccupied: 84 F clg, 55 F htg (admin); 55 F (hangar, considered as shop due to occupancy); 55 F (shop)

Same as Proposed

Other HVAC System

Vestibules: from the main system, no separate heating

IT/telecom, Elec room: ductless system

Mech/elec: unit heaters, exhaust fans

Secure areas: independent system, OA from DOAS

IDF / MDF: System 4 - PSZ-HP, Packaged single zone, constant volume, DX cooling, heat pump heating

Vestibules, mechanical: System 10 - Heating and Ventilation, constant volume, electric resistance

HVAC All Electric Option 1 - Admin: chilled water (ACC, scroll) (44F, 14 F delta-T, 30% prop. glycol), electric reheat, VAV (ERV); Hangar: MAU w/ electric resistance heat and ERV (MAU off in summer; use louvers and exhaust fans during summer)

HVAC All Electric Option 2 - Admin: Packaged RTU heat pump, w/ DOAS heat pump, electric resistance reheat, VAV (ERV); heat pump low ambient temp 17 F; Hangar: MAU w/ ERV, heat pump heating (electric resistance backup)

HVAC All Electric Option 3 - Admin: VRF heat recovery and w/ ERV; VRF low ambient 0 F; Hangar: MAU, ERV, heat pump (Daikin Aurora) (electric resistance backup)

HVAC Natural Gas Alternate 1 - Admin: ACC/chilled water, condensing boiler/hot water (160 F - 120 F), DOAS with chilled/hot water coils, Plate

ERV (70% eff.), AHU VAV with chilled/hot water coils, VAV boxes with hot water reheat; Hangar: (4x) MAUs with direct fired natural gas, 94% efficiency, plate ERV (70% eff.), electric defrost @ 10 F

HVAC Natural Gas Alternate 2 - Admin: Same as Alternate 1; Hangar:

(2x) MAU, 30,000 cfm, with direct fired natural gas (natural gas preheat, electric defrost @ 10 F), 94% efficiency, plate ERV (70% eff.), overhead radiant infra-red natural gas heating at 90 ft (derated to 70% of the heater capacity)

HVAC Natural Gas Alernate 3 - Admin: Same as Alternate 1; Hangar:

(2x) MAU, 30,000 cfm, with direct fired natural gas (natural gas preheat, electric defrost @ 10 F), 94% efficiency, plate ERV (70% eff.), in-floor radiant heating (variable flow, constant temperature, surface temperature reset by space temperature) using same condensing boiler as HVAC hot water loop, with individual control valve for each zone

HVAC Natural Gas Alernate 4: Admin: Same as Alternate 1; Hangar: (2x)

MAU, 30,000 cfm, with direct fired natural gas (natural gas preheat, electric defrost @ 10 F), 94% efficiency, plate ERV (70% eff.), natural gas unit heaters (about 30 ft high) with on-off fan control and 93% efficiency

Zoning: 2 DOAS(N and S); 3 AHU (N, S floor 1, S floor 2), 3 RTU (N, S floor 1, S floor 2), VRF condensing units under 30 tons each

Primary HVAC System

Office: System 6 - Packaged VAV with PFP boxes, DX cooling, electric resistance

Hangar: System 10 - Heating and ventilation, constant volume, electric resistance

Mechanical (contd.) Proposed Baseline

Equipment Efficiencies

Per 90.1-2019

Air-cooled chiller: 150 tons, EER 10.1

Gas-fired MAU: 92-94% efficiency gas

Condensing boiler: 95% efficiency

Cooling -

DX: 3.6 COP

Heating -

Electric resistance: 100%

Equipment Capacities Autosized by energy model Autosized

Design Air Flow Rates (cfm)

Autosized by energy model

No more than 3,000 cfm per VAV box

Max 3 offices per VAV box

System 4 and System 6: 20ºF supply-air-to-zone air temperature difference

System 10: temperature difference between supply air of 105ºF and zone setpoint

Ventilation (cfm)

ASHRAE 62.1-2022 for Admin areas

0.5 cfm/sf for Hangar

Same as Proposed, except for DCV in Proposed where OA system ≤

3,000 cfm serving areas with average design capacity of 100 people per 1,000 ft2 or less

Exhaust (cfm)

Fom Stor EF: 912 cfm

Lo Stor: 1,470 cfm

Mech EF: 1,000 cfm

Restrooms EF: 1,550 cfm

Sheet Metal EF: 770 cfm

Shops EF: 2,100 cfm

Hangar EF: 30,500 cfm

Same as Proposed

Demand Controlled Ventilation NA NA

Economizers 63ºF DB high limit shut off Not required

System Fan Power (W) Autosized Per G3.1.2.9

Exhaust Air Energy Recovery

80% effectiveness, plate and frame (sensible and latent) for HVAC All

Electric options 1 to 3

70% effectiveness, plate and frame (sensible and latent) for HVAC Natural

Gas alternates 1 to 4.

50% effectiveness where applicable (refer to G3.1.2.10): design CFM ≥

5,000 cfm and OA ratio ≥ 70%. Not required for heating systems in

Zone 0 to 3 (e.g. System 10)

Supply Air Reset

SAT for cooling reset higher by 5ºF under the minimum cooling load conditions

System 6: SAT for cooling reset higher by 5ºF under the minimum cooling load conditions

System 4 and System 10: not applicable

Hot Water Plant 95% efficient N/A

Hot Water Loop

Supply 160 F, return 120 F

Reset N/A

Pumps 19 W/gpm, 60 ft head

N/A

Chilled Water Plant 2.96 COP N/A

Chilled Water Loop

Primary-secondary configuration, 30% propylene glycol

Supply 44 F, return 58 F

Pumps 22 W/gpm, 250 gpm, 40 ft head for primary, 55 ft head for secondary

N/A

Plumbing Proposed Baseline

SHW Type Electric Storage Electric resistance storage water heater (per Table G3.1.1-2)

SHW Size (2x) 210 gallon each Same as Proposed

SHW Efficiency 100% efficient 100% efficient

SHW Loop Supply 120F

Pump: 14 W/gpm Same as Proposed

SHW Load (gpm) 4.5 gpm Same as Proposed

Renewable Energy System Proposed Baseline

Photovoltaic

Panel: Fixed, roof mounted

420 kW

5 deg tilt

180 deg azimuth

96% inverter efficiency

N/A

* assumption (NM) not modeled (E) existing