Economic Analysis of Building Distributed Energy System (BDES) in the Chinese Different Cities

In this paper, the feasibility and its running mode of Building Distributed Energy System (BDES) are analyzed for large public buildings based on energy tariffs investigated in some Chinese cities and building´s load factor-user´s heat-to electric ratio. The relationship between Running Cost Saving Ratio (RCSR) and user´s heat-to-electric ratio is studied. The result shows that the higher user´s heat-to-electric ratio leads to the BDES more economic. In 15 cities investigated, BDES with electricity-tracking mode is appropriate for Chongqing, Changsha, and Chengdu. The suitable running modes of BDES in Wuhan, Qingdao Hohhot, Shenzhen and Guangzhou depend on user´s heat-to-electric ratio. It´s quite complicated to decide the running modes of BDES in the cities which use the TOU electricity tariffs. The detailed energy use of the buildings in these cities should be taken into account.