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Combined heating & power - Fuel cell - Industrial building
Template assignment
Base case
Template assignment
Base case
- Central grid connection for electricity
- Space and hot water heating by natural gas with 75% seasonal efficiency
- Well-insulated 20,000 m2 building
- Building heating load of 65 W/m2
- Domestic hot water heating base demand 20% of heating energy
- Cost of natural gas is $0.35/m3
Proposed case- Phosphoric acid fuel cell with 200 kW power capacity operating on natural gas
- Availability is 97%
- All power generated by the fuel cell will be sold to grid
- Minimal cell load is 25.0%
- Heat rate of 10,000 kJ/kWh
- Heat recovery rate of 55%, note that instantaneous thermal output roughly equivalent to fuel cell electrical output
- Heat load following operating strategy
- Heat required beyond that supplied by fuel cell is by existing 75% efficient gas boiler
- Installed cost of fuel cell is $5,000/kW
- An uninterruptible power supply system (UPS) would be the alternative to fuel cell, total cost of this system is $150,000 (including batteries and gas-fired generator)
- Electricity export rate is $0.12/kWh
- Operating and maintenance costs for fuel cell system of $0.029/kWh
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.
