業務用太陽熱空調システムの開発と実証

抄録

An advanced solar air conditioning system for commercial use was developed. Features of the system are (1) a single/double effect combined absorption chiller utilizes solar hot water by priority and the natural gas consumption is minimized, (2) to reduce heat capacity and heat loss, the system has no storage tank, and (3) a developed controller minimizes the electric consumption of hot water pump and enhances the collector efficiency by measuring solution temperature. Through the demonstration, (1) the chiller was driven only by the solar hot water when the air conditioning demand was low, (2) chilled water temperature was stable by controlling the back-up gas burner, and (3) the pump was operated only when the solar hot water temperature reaches high enough but as low as possible to drive the chiller. The CO₂ emission was reduced by about 16% from April 2010 to March 2011, compared with the previous system.