Abstract
This paper analyzes the structure of district heating system in Sect. 6.2 and indicates that it is a multistage heat transfer process. The energy quality decreases while the energy quantity remains if heat loss is ignored. In Sect. 6.3, heat sources with different temperature levels, which mean the energy quality, are analyzed. In Sect. 6.4, entransy, a physical quantity which represents the heat transfer ability, is used to describe the energy quality of heat in district heating system. The heat sources must meet the need of both energy quantity and entransy. Then the thermal analysis is carried out to prove the entransy dissipation is related to power generation and it must be reduced. Different methods are suggested for different result of calculation. In the last chapter, a case in Chifeng city is studied to test the theory of this paper.
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© 2014 Springer-Verlag Berlin Heidelberg
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Zhu, K., Xia, J., Jiang, Y., Fang, H. (2014). Thermal Matching of Heat Sources for District Heating System Based on Energy Quality. In: Li, A., Zhu, Y., Li, Y. (eds) Proceedings of the 8th International Symposium on Heating, Ventilation and Air Conditioning. Lecture Notes in Electrical Engineering, vol 262. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-39581-9_6
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DOI: https://doi.org/10.1007/978-3-642-39581-9_6
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