压力容器2025，Vol.42Issue(7)：30-37,8.DOI:10.3969/j.issn.1001-4837.2025.07.004
LNG在板壳式换热器内流动沸腾的试验研究
Experimental investigation on the flow boiling of LNG in a plate and shell heat exchanger
摘要
Abstract
As a clean energy,LNG was conducive to achieve the goal of"carbon peak and carbon neutrality".The vaporizer of LNG was the key component,where the flow boiling of cryogenic fluids took place.A plate and shell heat exchanger was experimentally analyzed as a vaporizer.An experiment system of close cycle had been developed for the heat transfer and flow of cryogenic fluids.The test temperature was 90～200 K,the operating pressure was 100～3 000 kPa,the flow rates was 1～24 g/s,the maximum heat capacity was 8 kW.The overall range of vapor qualities was covered for the flow boiling.The experiment system was used for flow boiling and single-phase heat transfer,with the heat transfer and pressure drop measured simultaneously.The experiment system was suitable for the different combinations of cryogenic fluids and heat exchangers.The saturation flow boiling test was conducted using methane,the main component of LNG.The influences of vapor qualities and heat fluxes were investigated on the heat transfer coefficients and two-phase pressure drop.The vapor qualities are 0.32～0.72,while the heat fluxes are 3.2～6.4 kW/m2.The circular plate and shell heat exchanger suppresses the dryout,which is analyzed according to the local measurements of heat transfer coefficients and wall superheating.This investigation lays the foundation for the further experiments of cryogenic experiments.The results indicate that the existing formulas are unable to accurately predict the heat transfer coefficient of LNG in plate and shell heat exchangers,necessitating the expansion of the experimental condition range and the proposal of a new formula.关键词
LNG气化器/板壳式换热器/流动沸腾/传热性能/两相压降Key words
vaporizer of LNG/plate and shell heat exchanger/flow boiling/heat transfer performance/two-phase pressure drop分类
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陶轩,吴童菲,谢梓芃,王思琦,迟浩淼,叶晶,栾辉宝..LNG在板壳式换热器内流动沸腾的试验研究[J].压力容器,2025,42(7):30-37,8.基金项目
浙江省自然科学基金白马湖实验室区域创新发展联合基金项目(LBMHY24E060008) （LBMHY24E060008）
