2021 Volume 46 Issue 297 Pages 11-20
The aim of this study is to clarify methods for calculating pipe diameter to enable the economic optimization of a district heating and cooling network. This report describes theories for calculation methods and the composition of construction costs for the district heating and cooling network that form the basis of these. Moreover, the relationship between civil engineering/pipe material/and pipe connection costs and pipe diameter is clarified. In addition, the results of analysis on the relationship between the economically optimal pipe diameter per unit of construction line length and the design conditions for direct burial insulated hot water pipes are discussed. The results show that the economically optimal pipe diameter is affected by conditions such as heat load, subsidy rate, and pipe installation location.
