Because energy consumption by demand for electricity, air-conditioning and hot water supply is so large in the small-scale stores such as a restaurant and a convenience store, it is very effective in saving energy and environmental preservation to introduce a power generation and heat supply system. In this paper, examination in effect of introducing the system with various heat sources is conducted in these small-scale stores. The system consists of a Stirling engine generator, a combustor, an exhaust gas heat exchanger or air pre-heater, and a low temperature regenerative desiccant air-conditioner. From the results of examination using the biomass fuel (wood pellet, wood chip and firewood), it makes clear that reduction in CO_2 emissions is vastly realized, but nmning cost down is difficult because of current biomass fuel cost.
