JAUE2024-045: Verification of efficiency improvement via system restructuring of DHC

Abstract

The District Heating and Cooling (DHC) to be studied is located in Tokyo metropolitan area, Japan. Twenty years after the start of heat supply in 1990, the heat source plant was renovated because of changes in heat demand and aging of the equipment. The renovations were conducted from January 2016 to March 2022. Consequently, the efficiency of heat source plants was improved by approximately 40% at the top level in Japan. Because many district heating and cooling systems will be renewed in Japan in the future, we believe that the operational performance of this heat source plant will be a valuable reference. In this study, we analyzed the data of the operation results after renovation and discussed the factors for high efficiency of the heat source plant, the characteristics of the operation logic, and the important points to be considered when designing or renovating a heat source plant.