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ETV/COMBINED HEAT AND POWER AT A COMMERCIAL SUPERMARKET CAPSTONE 60 KW MICROTURBINE SYSTEM
Citation:
Anon. ETV/COMBINED HEAT AND POWER AT A COMMERCIAL SUPERMARKET CAPSTONE 60 KW MICROTURBINE SYSTEM. U.S. Environmental Protection Agency, Washington, DC, EPA-600/R-03/126.
Description:
The Environmental Technology Verification report discusses the technology and performance of the Capstone 60 Microturbine CHP System manufactured by Capstone Microturbine Corporation. This system is a 60 kW electrical generator that puts out 480 v AC at 60 Hz and that is driven by a gas turbine fueled by natural gas at 60 to 100 psig. It has a gas compressor for boosting low pressure input gas, if necessary. The Capstone 60 can supply heat in addition to electricity through a subsystem that recovers heat from the turbine exhaust gas. The performance verification tests were conducted for 14 days at a supermarket. The electrical output was wired directly to the store's 480 v main panel, and the heat recovery unit was integrated into the store's air handler. At full load, gross electrical output averaged 59.6 kW at 28.4% efficiency, 4.7 kW of which was used to power the gas compressor and heat recovery pump, leaving a net output of 54.9 kW at 26.2% net electrical efficiency. At full load, the system supplied a maximum of 373,000 Btu/hr of recovered heat at a thermal efficiency of 52.2%, making the total system efficiency 78.4%. The average electrical output characteristics over the 14-day test period were 60.000 Hz, 494.48 v, 99.98% power factor, and total harmonic distortion of 5.66% in current and 1.98% in voltage. At full load, the system emissions of nitrogen oxides, carbon monoxide, total hydrocarbons, methane, and carbon dioxide were 0.000149, 0.000103, 0.0000177, less than 0.0000158, and 1.54 lb/kWh, respectively.