Risk Evaluation of Ammonia Leakage based on Modified Probability Calculation Formulas

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  • 1. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, MOE, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
    2. State Key Laboratory of Air-Conditioning Equipment and System Energy Conservation, GREE Electric Appliances, Inc. of Zhuhai, Guangdong 519070, China

Online published: 2023-11-28

Supported by

This work was supported by the State Key Program of the National Natural Science Foundation of China (Grant No. 51936007).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023

Abstract

Due to its flammable, explosive, and corrosive characteristics, fire, and explosion accidents caused by ammonia leakage occur from time to time. In this work, the concentration distribution of the model was calculated according to the existing formula of probabilistic risk assessment. Using the revised formulas, the leakage of the ammonia room was quantitatively analyzed, and different state parameters were analyzed to find out the dangerous leakage points of the ammonia refrigeration system. The results of the calculation are that the existence of obstacles in the space will increase the probability of leakage risk. And the greater the leakage time to the lower flammability limit accounts for the total leakage time, the greater the risk probability. Dangerous leakage in ammonia systems mainly occurs in storage tanks and condensers. The data show that the dynamic mass flow of ammonia leakage decreases with time, and the leakage diameter increases with the increase of leakage pressure. At the same time, the leakage mass increases gradually with the leakage aperture near circular.

Cite this article

GE Yingying, YANG Zhao, HE Hongxia, WU Xiaokun, CHEN Yubo, LV Zijian, ZHANG Yong . Risk Evaluation of Ammonia Leakage based on Modified Probability Calculation Formulas[J]. Journal of Thermal Science, 2023 , 32(2) : 854 -865 . DOI: 10.1007/s11630-023-1781-3

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