Abstract
We are developing a new co-generation system for apartment houses (Neighboring Co-Generation: NCG). The key concept of this system is to install a heat accumulator with a hot water supply and a room heating function at each household and to connect different households with single loop of heat transfer line. As a result, time leveling of the heat supply and heat transferring among households become possible. Thus, the costs of the piping and the heat source equipment decreases. We newly developed heat accumulator with normal pressure tank of hot water for space heating. In this paper, we report the outline of the heat accumulator and the result of accumulation and heat supply test.