Abstract
This paper presents the study of DHC (district heating and cooling) business in 3 northeast Asian cities-Tokyo, Beijing and Seoul, in which, projects like initial background, annual fluctuation, current status and heat rate system were investigated. The difference and the feature of DHC use in the city in a country different through the comparison of three cities are analyzed, As a result, this paper may propose a material for DHC business progressing and a new way about the environmental policy in the future. During the period of 2006, DHC annual sales showed big differences in 3 cities. It can be seen that sales for houses and Commercial buildings were also different. The differences of the heat rate unit price by the heat service area of the DHC were large in Tokyo, while small in Beijing and Seoul. Additionally, by use of the building thermal model and comparing individual heat source system, the difference between DHC heat rates in 3 cities is confirmed.
