Modeling and Analysing Leakage of Heating Pipe Network in Park

doi:10.12068/j.issn.1005-3026.2020.10.006

Abstract

Abstract: In order to improve the safety of heating system and the accuracy of fault diagnosis system， hydraulic characteristics of a park’s heating pipe network under leakage conditions were modeled based on the graph theory， and the indoor-user temperature under different conditions was solved from the energy-balance equations of the pipe network. The effects of different leakage conditions on hydraulic and thermal characteristics of heating network were analyzed. The results show that the leakage faults at any point in heating pipe network will affect hydraulic characteristics of the system， and the closer the leakage point is to the circulating water pump， the greater impact on the flow of heating system pipe. Moreover， the change of hydraulic characteristics of heating pipe network can cause a coupling effect on thermal characteristics. The results can provide a guidance for the prediction of leakage accidents and fault diagnosis of heating pipe networks.

Key words: heating network, leakage, graph theory, hydraulic characteristic, thermal characteristic, fault diagnosis

CLC Number:

TU833

LI Guo-jun， LI Yi-qing， QIU Yong. Modeling and Analysing Leakage of Heating Pipe Network in Park[J]. Journal of Northeastern University Natural Science, 2020, 41(10): 1402-1409.

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