Eco 372 Week 1

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Table 12: Existing Central HVAC System Energy Consumption
Equipment Rated Input Load Factor Utilisation Factor Run Hours Annual Consumption Cost ($/yr)
Boiler 877 MJ/h 0.5799 0.42 5475 1169 GJ $16,840
Boiler Pump 0.75 kW 0.6 0.42 5475 1035 kWh $138
Compressor C1 66 kW 0.6 0.42 5475 91,060 kWh $12,111
Compressor C2 31 kW 0.6 0.42 5475 42,771 kWh $5,689
Condenser 4 kW 0.6 0.42 5475 5,519 kWh $734
Condenser Pump 0.37 kW 0.7 0.42 5475 510 kWh $68
AHU Fan 11 kW 0.9 1 5475 54,203 kWh $7,209
Total 1169 GJ + 195,097 KWh $42,788

Therefore, the savings can be calculated as: Cost Saving Option A = 40% of 1169 GJ + 40% of 195,097 KWh @ 13.3c/KWh & 14.4$ GJ = 467.6 GJ + 78038.8 KWh saving …show more content…
6.2 Packaged A/C Units (PAC unit) Upgrade
6.2.1 Existing Equipment
There are a number of A/C units owned by the OC which service individual shops. These are located on the roof (locations shown in Error! Reference source not found.) and controlled from the plant room using a timer. The model numbers and capacities of these units (assuming COP 2.8) are:
- Carrier model 50MQ027900 (A/C units 1, 3, 4, 5 and 8). RLA = 5.0 => Input = 3 kW. Estimated heating/cooling capacity = 8.4 kW.
- Carrier model 50MQ037900 (A/C units 2 and 6). RLA = 6.9 => Input = 4.14 kW. Estimated heating/cooling capacity = 11.6 kW.
- Airwell (model unknown) with cooling capacity 16 kW (A/C unit 7). Estimated input = 5.7 kW.
The units correspond to the following shops:
- A/C unit 1: Charcoal Chicken
- A/C unit 2: Harcourts
- A/C unit 3: Total Image
- A/C unit 4: Bakers Delight (unit broken – Bakers Delight owns Fujitsu A/C)
- A/C unit 5: Wheelers Hill Café

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