太陽集熱器の複合構成法に関する経済的効果

抄録

The compound configuration of a flat plate and a parabolic trough solar collector was considered on the basis of exergy (available work). The economical analysis was executed taking the heat collection temperature and the collector cost as parameteters. Two systems were treated in connection with the way in which the constant heat collection temperature was determined. One is the system in which it is determined by a factor other than the collector performance, such as the load demand. The other is the system in which it is determined by the collector performance, and is optimized by maximizing the yearly exergy output. As a result, the compound configuration produces only a slight increase in output. From an economical point of view, however, the former system can decrease the exergy cost by a maximum of over 50%, in which case the heat collection temperature is at the upper limit of the flat plate collector. On the other hand, the latter system can decrease the exergy cost by a maximum of about 10%. Therefore, it is concluded that the flexibillity in setting the heat collection temperature significantly decreases the effect of the compound configuration.