Abstract
A number of district energy systems have been built recently in Yangtze River Delta where is the most developed region in China. Meanwhile, many problems around the systems are rising. Firstly, almost all energy stations adopt the redundancy design of energy load, which leads to the inefficiency of energy during part-load operation, especially. Secondly, primary and secondary chilled water could be unbalanced due to redundancy design. Furthermore, low occupancy rate could lead over supplied of energy station, and large water flow with narrow temperature difference in heating and cooling network could result in the low-energy efficiency and poor economy. In order to solve those problems, a model of district energy system was put forward in this paper, based on prototypical building load. On one hand, the model considers delayed performance of energy system and key factors of district energy system planning. On the other hand, it can make the energy supply matching to the hourly loads of every user.
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