抄録
This paper describes the effectiveness of a residential fuel cell combined heat and power (CHP) system for cold regions for energy conservation. Residential CHP system has attracted attention for its high energy saving and environmental performance, and systems using gas engines and fuel cells have recently been introduced into the market in Japan. 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 4 residential fuel cell systems in Sapporo, and compared with the results in non-cold regions. According to the data of demonstration tests, contribution rate of supplied power of fuel cell systems are higher than the national average. The amount of reduction in primary energy was 1.3 to 3.4 MWh/year compared with the conventional type (commercial power + non-condensing boiler). And the figures are higher than the results of the residences in non-cold regions which have comparable energy consumption. Results of multiple linear regression analysis, the amount of reduction in primary energy correlate highly with electric demand and domestic hot water demand.
