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Combined heating & power - Gas turbine - Apartment building

Template assignment

Base Case

• Apartment building, 45,000 m², medium insulation
• Heated with natural gas, good quality standard boiler with pilot light
• Fuel rate is $0.40/m³
• Hot water is 10% of total heating energy
• Load characteristics:

Proposed case

• Energy efficiency measures result in 10% reduction in peak heating load and 5% reduction in peak electricity load
• Install two new 100 kW micro-turbines (natural gas fuelled) to generate power and heat for the apartment and sell excess power to the grid
• Heat rate for the micro-turbines is 12,000 kJ/kWh
• Cost of installed gas turbines is $2,000/kW
• Gas turbines operate at full capacity, heat recovery efficiency is 60%
• Can sell electricity to grid at $0.10/kWh and can buy, if required, at $0.12/kWh
• New high efficiency 3,500 kW natural gas boiler used for peak heating loads
• Cost of boiler is $175,000
• O&M cost for new system are $40,000 per year

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.