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Improving Risk Assessment Of Refrigerant Leakage Hazards: Going Beyond Physical Testing. 

Number: No 214

Author(s) : HOSUR S., TABADDOR M.

Summary

Simulation based risk assessment of refrigerant leakage hazards calls for accurate prediction of concentrations of the leaked refrigerant gas into an indoor environment. Although computational fluid dynamics (CFD) is seen as a promising tool to model complex dispersion scenarios, it is necessary that it be properly validated against reliable experimental data before the predictions can be used with confidence. In this paper, validation of the model is carried out for some scenarios involving a propane gas leak in to a confined space with various leak flow rate and locations. More importantly, we introduce a new risk metric to measure the probability of fire when there is leakage of a combustible propane gas into a confined space. This risk metric can only be obtained from the rich data generated by CFD modeling. This risk metric tracks the volume of combustible propane gas that lies between the upper and lower flammability limits. The results demonstrate how the risk metric provides a simple of fire risk ranking for different leakage scenarios.

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  • Original title: Improving Risk Assessment Of Refrigerant Leakage Hazards: Going Beyond Physical Testing. 
  • Record ID : 30030043
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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