Numerical investigation of cryogen re-gasification in a plate heat exchanger

[摘要] The efficient re-gasification of cryogen is a crucial process in many cryogenic installations. It is especially important in the case of LNG evaporators used in stationary and mobile applications (e.g. marine and land transport). Other gases, like nitrogen or argon can be obtained at highest purity after re-gasification from their liquid states. Plate heat exchangers (PHE) are characterized by a high efficiency. Application of PHE for liquid gas vaporization processes can be beneficial. PHE design and optimization can be significantly supported by numerical modelling. Such calculations are very challenging due to very high computational demands and complexity related to phase change modelling. In the present work, a simplified mathematical model of a two phase flow with phase change was introduced. To ensure fast calculations a simplified two-dimensional (2D) numerical model of a real PHE was developed. It was validated with experimental measurements and finally used for LNG re-gasification modelling. The proposed numerical model showed to be orders of magnitude faster than its full 3D original.

[发布机构] Wroclaw University of Science and Technology, Department of Cryogenic, Aeronautic and Process Engineering, Wyb Wyspianskiego 27, Wroclaw; 50-370, Poland^1

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Computational demands;Design and optimization;Mobile applications;Numerical investigations;Plate heat exchangers;Simplified mathematical model;Two Dimensional (2 D);Vaporization process