Lumped Multi-Bubble Analysis of Injection Cooling System for Storage of Cryogenic Liquids

[摘要] Storage of cryogenic liquids is a critical issue in many cryogenic applications. Subcooling of the liquid by bubbling a gas has been suggested to extend the storage period by reducing the boil-off loss. Liquid evaporation into the gas may cause liquid subcooling by extracting the latent heat of vaporization from the liquid. The present study aims at studying the factors affecting the liquid subcooling during gas injection. A lumped parameter model is presented to capture the effects of bubble dynamics (coalescence, breakup, deformation etc.) on the heat and mass transport between the gas and the liquid. The liquid subcooling has been estimated as a function of the key operating variables such as gas flow rate and gas injection temperature. Numerical results have been found to predict the change in the liquid temperature drop reasonably well when compared with the previously reported experimental results. This modelling approach can therefore be used in gauging the significance of various process variables on the liquid subcooling by injection cooling, as well as in designing and rating an injection cooling system.

[发布机构] Cryogenic Engineering Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal; 721302, India^1

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Cryogenic applications;Heat and mass transports;Injection temperature;Latent heat of vaporization;Liquid evaporation;Liquid temperature;Lumped parameter modeling;Operating variables