Abstract
This paper describes the effectiveness of a residential gas engine combined heat and power (GE-CHP) system for cold regions for energy conservation. Residential CHP system has attracted attention for its high energy saving and environmental performance. In Hokkaido as a cold region, high energy demand exists, which causes a large amount of CO2 emissions and energy consumption compared to national average. Under such circumstances, we conducted demonstration tests of 11 residential GE-CHP systems in Sapporo. The exhaust heat of the GE-CHP systems of the demonstration tests were used for ventilation warming, while exhaust heat of the GE-CHP systems were used for hot-water heating in the usual case. According to the data of demonstration tests, the amount of reduction in primary energy was an average of 4.8 MWh/year compared with the conventional type (commercial power + non-condensing boiler), which includes an average of 0.38 MWh/year reduction by using the ventilation warming. Compared to the results of previous demonstration tests which used same GE-CHP without ventilation warming, the amount of reduction in primary energy showed significant differences.
