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Cooling - Absorption - Clinic

Template assignment

Base case

• Cooled floor area is 10,000 m²
• Cooling load for building is 40 W/m²
• Compressor capacity of 400 kW
• Non-weather dependant cooling is 5%
• Compressor-based chillers
• Seasonal COP of 4.8
• Electricity operates compressor and costs $0.10/kWh and $10/kW/year for peak demand charge
• Natural gas-fired boilers provide heat during heating season
• Building uninterruptible power supply (UPS) must have sufficient capacity to operate chillers during power outages
• Installed cost of compressor capacity: $80,000
• Installed cost of natural gas heating capacity: $20,000
• Installed cost of additional uninterruptible power supply (UPS) generator capacity: $40,000

Proposed case

• Direct-fired, double effect absorption chillers
• Seasonal COP of 1.2
• Chiller can also serve as natural gas-fired heater in the heating season
• Installed cost of chiller: $160,000
• Cost of maintaining absorption chiller/heater is around $500 less per year than cost of maintaining separate compressor and natural gas boiler units
• Absorption chiller does not incur significant peak demand charges
• Absorption chiller does not require significant electricity during power outages
• Natural gas rate is $8/GJ

Solution

The worked-out solution is the data file selected from within the RETScreen Project Database. The user automatically downloads the Project Database file while downloading the RETScreen software.