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Safety Evaluation of LNG Chemical Plants Based on Combination Weighting Method and Cloud Model
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Xiao-ya SU1, Lin-bo QIN1, 2, *, Jun HAN1, 2, Bo ZHAO1, 2, Wang-sheng CHEN1, 2
Science Technology and Engineering | 2025, 25(7) : 3071 - 3077
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Science Technology and Engineering | 2025, 25(7): 3071-3077
• Papers·Environmental and Safe Science •
Safety Evaluation of LNG Chemical Plants Based on Combination Weighting Method and Cloud Model
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Xiao-ya SU1, Lin-bo QIN1, 2, *, Jun HAN1, 2, Bo ZHAO1, 2, Wang-sheng CHEN1, 2
Affiliations
  • 1 College of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
  • 2 Hubei Provincial Industrial Safety Engineering Technology Research Center, Wuhan 430081, China
Published: 2025-03-08 doi: 10.12404/j.issn.1671-1815.2402427
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To address the fuzziness and randomness in safety evaluations of liquefied natural gas (LNG) chemical plants, a novel risk assessment method was proposed based on the normal cloud model. The proposed method was based on the selection of evaluation indicators from the perspective of intrinsic safety, which was used to evaluate the severity and likelihood of accidents through expert judgment. The weights of the indicators were determined by combining the analytic hierarchy process (AHP) and the criteria importance though intercrieria correlation (CRITIC). The risk matrix thresholds were softened using a forward cloud generator, and the evaluation results were optimized through a backward cloud generator to obtain cloud characteristic numbers and generate corresponding two-dimensional cloud maps. By comparing the actual cloud map with the standard cloud map, the risk levels of the evaluation indicators were determined. The results show that the model effectively integrates the expert opinions with aims of retaining the randomness and fuzziness, and providing the visualizes the risk assessment results. The novel method also provides a new risk assessment tool for the safety management of LNG chemical plants.

LNG chemical plant  /  cloud models  /  analytic hierarchy process (AHP)  /  CRITIC weighting method  /  safety evaluation
Xiao-ya SU, Lin-bo QIN, Jun HAN, Bo ZHAO, Wang-sheng CHEN. Safety Evaluation of LNG Chemical Plants Based on Combination Weighting Method and Cloud Model[J]. Science Technology and Engineering, 2025 , 25 (7) : 3071 -3077 . DOI: 10.12404/j.issn.1671-1815.2402427
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Year 2025 volume 25 Issue 7
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Article Info
doi: 10.12404/j.issn.1671-1815.2402427
  • Receive Date：2024-04-05
  • Online Date：2026-03-30
  • Published：2025-03-08
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  • Received：2024-04-05
  • Revised：2024-07-09
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Affiliations
    1 College of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
    2 Hubei Provincial Industrial Safety Engineering Technology Research Center, Wuhan 430081, China
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