A STUDY ABOUT IMPROVEMENT OF EFFICIENCY OF A SEWAGE HEAT UTILIZATION SYSTEM
We investigate an optimum design and operation of a sewage heat utilization system by extracting and analyzing operational data on the Makuhari High-Tech Business Area District Heating and Cooling System (hereafter referred to as “Makuhari DHC System”). The analysis revealed that a constant high effect can be obtained in terms of different cold/hot heat ratios required by consumers, and that the effectiveness of using sewage as a heat source would be increased. Furthermore, compared with "the conventional concentrated heating system", "a distributed heat pump systems with separate heat sources water" uses sewage more effectively.