A/C Final Project: Design Builder

Tom Christen

House Design

Back View

Front View

House Layout

Location Information• Location: Buffalo, NY• Latitude: 42.92oN (25o in Dubai)• Longitude: 78.72oW• Winter Design Weather Data:– Outside Design Temperature: -16.5oC– Wind Speed: 16.5m/s

• Summer Design Weather Data:– Max Dry Bulb Temperature: 30.1oC– Coincident Wet-Bulb Temperature:– 21.5oC– Min Dry-Bulb Temperature: 20.6oC

Materials:• External Walls: (outside to

inside)– Brickwork (Inner Leaf) – 10cm– XPS Extruded Polystyrene – 7cm– Wood Blocks – 10cm– Glass Wool – 5cm– Gypsum Plaster – 1.3cm

• Roof:– Asphalt Tiles – 2.5cm– Air Gap – 1cm– Roofing Felt – 0.5cm– Glass Wool – 8cm

• Internal Partitions:– Gypsum Plaster – 5cm– Air Gap – 10cm

– Gypsum Plaster – 5cm• Ground Floor:

– Oak (Radial) – 3cm– Glass Wool – 7cm– Wood Blocks– 10cm– Cast Concrete – 10cm

• External Windows:– Double Paned – 10% glazed

• Sunroom Window:– Quadruple Paned – 20% glazed

• External Door:– Steel – 4cm

• Internal Door:– Pine – 3.5cm

Heating/Cooling Systems

• Split Central A/C Unit– The outdoor cabinet (shown below) contains the condenser

and compressor. An indoor cabinet contains the evaporator. – The indoor cabinet also contains a furnace.

• Heating:– Fuel: Natural Gas– Heating System COP: 0.8

• Cooling:– Fuel: Electricity from grid– Cooling System COP: 1.6

Heating and Cooling Loads

• Overall, I took data for 6 different scenarios– 4 House Orientations (Sunroom facing North,

South, East, and West)• Looking for best and worst case scenarios

– 2 House Relocations (Hot and Frigid Climates)• Compare Buffalo, NY to extremely hot and extremely

cold climates

Heating and Cooling Loads

• Orientation 1: West

• Heating Results:– Design Capacity: 24.87kW– Top 3 Room Heating

Requirements:

• Family Room: 4.03kW (16%)• Den + Game Room: 3.67kW

(15%)• Kitchen: 3.12kW (13%)

• Cooling Results:– Design Capacity: 10.11kW– Top 3 Room Cooling

Requirements:• Sunroom: 3.47kW (34%)• Kitchen: 1.88kW (19%)• Family Room: 1.34kW (13%)

Orientation 1 Temperature and Heat Gain

Heating/Cooling Loads (Continued)• Orientation 2: North

• Heating Results:– Design Capacity: 24.82kW– Top 3 Room Heating

Requirements:• Family Room: 4.03kW (16%)• Den + Game Room: 3.66kW (15%)• Kitchen: 3.12kW (13%)

– Sunroom: 2.18kW (9%) – Same energy req. when large sunroom window faces N or S.

• Cooling Results:– Design Capacity: 7.84kW– Top 3 Room Cooling

Requirements:• Kitchen: 1.56kW (20%)• Sunroom: 1.34kW (17%)• Family Room: 1.14kW (15%)

– Lower than other orientations since large sunroom window faces north. This means that the window sees no sun, and does not absorb any heat.

Heating/Cooling Loads (Continued)• Orientation 3: 180

degrees (East)

• Heating Results:– Design Capacity: 24.87kW– Top 3 Room Heating

Requirements:• Family Room: 4.04kW (16%)• Den and Game Room:

3.67kW (15%)• Kitchen: 3.12kW (13%)

• Cooling Results:– Design Capacity: 9.29kW– Top 3 Room Cooling

Requirements:• Sunroom: 2.95kW (32%)• Kitchen: 1.49kW (16%)• Den and Game Room:

1.17kW (13%)

Heating/Cooling Loads (Continued)• Orientation 4: South

• Heating Results:– Design Capacity: 24.83kW– Top 3 Room Heating

Requirements:• Family Room: 4.00kW (16%)• Den and Game Room: 3.67kW

(15%)• Kitchen: 3.12kW (13%)

– Sunroom: 2.18kW (9%) – Do not save any energy with this large south facing window when compared to orientation 2 (90 degrees).

• Cooling Results:– Design Capacity: 10.52kW

• 3kW higher that north orient

– Top 3 Room Cooling Requirements:• Sunroom: 3.04kW (29%) – faces

sun at all times – over 200% higher than when sunroom faces north

• Kitchen: 1.71kW (16%)• Master Bedroom: 1.69kW (16%)

Results• Best Case:– Heating:

• Very little fluctuation when rotating house. Maximum heating load change of 0.04kW.

– Cooling:• Minimum cooling load when

sunroom faces north (receives no sunlight).

• Overall, the best case scenario of my house would be with the sunroom facing north (but then it wouldn’t be much of a sunroom!).

– Heating Load: 24.82kW– Cooling Load: 7.84kW

• Worst Case:– Heating:

• Very little fluctuation when rotating house. Maximum heating load change of 0.04kW.

– Cooling: • Maximum cooling load when

sunroom faces south (constantly faces sun).

• Overall, the worst case scenario of my house would be with the sunroom facing south.– Heating Load: 24.83kW– Cooling Load: 10.52kW

Relocation 1

Dubai, UAE

Latitude: 25.25oNLongitude: 55.33oE

Winter Weather Data:-Outside Design Temp: 12.3oC

Summer Weather Data:-Max Dry Bulb Temp: 42.4oC-Coincident Wet-Bulb Temp: 24.1oC-Min Dry-Bulb Temp: 32.6oC

Relocation 1• Heating Results:– Design Capacity: 5.22kW

(475% reduction from Buffalo, NY)• Heating load likely due to

temperature drop at night

– Top 3 Room Heating Requirements:• Family Room: 1.11kW

(21%)• Den + Game Room:

0.84kW (19%)• Kitchen: 0.54kW (10%)

• Cooling Results:– Design Capacity:

24.38kW (240% increase from same orientation in Buffalo, NY)

– Top 3 Room Cooling Requirements:• Master Bedroom: 3.8kW

(16%)• Kitchen: 3.37kW (14%)• Sunroom: 2.83kW (12%) –

faces sun at all times

Relocation 2

Dikson Island, Russia

Latitude: 73.53oNLongitude: 80.40oE

Winter Weather Data:-Outside Design Temp: -38.9oC

Summer Weather Data:-Max Dry Bulb Temp: 15.4oC-Coincident Wet-Bulb Temp: 12.5oC-Min Dry-Bulb Temp: 12oC

Relocation 2• Heating Results:– Design Capacity: 50.29kW

(200% increase from Buffalo, NY – 1000% increase from Dubai)

– Top 3 Room Heating Requirements:• Family Room: 7.79kW

(15.5%)• Den + Game Room:

7.06kW (14%)• Kitchen: 6.56kW (13%)

• Cooling Results:– Design Capacity: 3.65kW

(290% reduction from same orientation in Buffalo, NY – 670% reduction from Dubai)

– Top 3 Room Cooling Requirements:• Sunroom: 2.84kW (78%) –

faces sun at all times• Laundry Room: 0.45kW

(12%) – laundry equipment heats up room

• Kitchen: 0.36kW (10%)

Questions?