Modeling Energy

Consumption in Religious

Establishments

Franco Morelli

Hyoungsub Kim

The church is located amongst a community

of residential homes

• College Station, TX

• ASHRAE Climate Zone 2A – Hot

&Humid

• Between 6,000 and 9,000 CDD

The building has a 24,864 ft2 footprint. Community

meeting areas in center. Classrooms and ,offices on

outside.

The buildings have several architectural

features that make modeling challenging, yet

interesting

• Cultural Hall

• Basketball Court

• Stage

• Divider

• Approx. 53’ x 79’ x 20’

• Chapel

• Approx. 53’ x 53’ x 20’

• 2 Tinted glass

doorways lead to

vestibule

A couple more interesting architectural

features

• Transformed Rooms

with Dividers

• Several Self

Contained Rooms

• 2 Vestibules

• 3 Foyers

A couple of energy consuming features of the

building

• Tankless Water

Heating

• Bathrooms

• Baptismal Font

• T8 and T12 Lighting

The buildings use several traditional, vapor

compression split systems for cooling

There are 10 air handles supplying

conditioned air to 10 zones.

Building Layout

Floor Plan Section Plan

Two Parts : 1. Cultural Hall & Chapel

2. Office & Hallway

Zone

EnergyPlus Model

1. HVAC Template_1 Zone

2. HVAC Template_9 Zone

3. Chiller_1 Zone

4. Chiller_9 Zone

1 Zone 9 Zone

HVAC Duct

SketchUp Model

Axonometric Drawing

Schedule

Occupancy

1. Chapel & Cultural hall

(Weekly & Daily)

2. Office

(Weekly & Daily)

Lighting & Equipment

1. Weekly

2. Daily

60% 90%

Results

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with attic [kWh]

without attic [kWh]

Measured data(kWh)

Baseline_Template_1 Zone

VS

Attic Without Attic

100% 150%

100% 230%

Total

December

Baseline_Template_9 Zone

(initial result)

Initial result > Measured data : 1.7 times

Internal Gains

People : 0.05 person/m^2 (office)

0.75 person/m^2 (chapel)

Lighting : 10 W/m^2

Equipment : 8.9 W/m^2

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Measured data [kWh]

Baseline_Template_9 Zone

(Calibration)Schedules

Chapel : weekly, daily

Office : weekly, dailyFinal result < Measured data : 10%

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calibration [kWh]

Measured data [kWh]

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1zone [kWh]

9zone [kWh]

Bill(kWh)

Baseline_Template_9 Zone

Final result (9 zone) < Measured data : 10%

Final result (1 zone) < Measured data : 8.4%

; except March, July : 12%

; except March, July : 12%

The energy efficiency improvements

The energy efficiency improvements

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baseline[kWh]

Insulation [kWh]

Improve Insulation : exterior wall ( 50mm 76mm )

roof insulation ( X 50mm ) 4 % improvement

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Window [kWh]

Improve window : clear 3mm / Air 13mm / clear 3mm

Triple LoE glass 2% improvement

The energy efficiency improvements

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baseline [kWh]

Insul+Win [kWh]

6% improvement

The energy efficiency improvements

Improve insulation : 76 mm insulation

Improve window : Triple LoE glass

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Insul+Win+Orient

The energy efficiency improvements (orientation)

1% improvement

Total : 7 %

Southeast South

Chiller System Simulation Comparison

Comparison of billed energy usage with

chilled water HVAC energy usage for single

zone simulation

Comparison of split HVAC with chilled water

HVAC energy usage for single zone

simulation

Comparison of billed energy usage with chilled water HVAC energy usage for 9 zone simulation

Comparison of split HVAC with chilled water HVAC energy usage for 9 zone simulation

Questions?