流体机械2025，Vol.53Issue(11)：2-8,7.DOI:10.3969/j.issn.1005-0329.2025.11.001
LNG高压气化器流动传热试验研究
Experimental study on flow and heat transfer of LNG high-pressure vaporizer
摘要
Abstract
To address the issues of insufficient heat transfer capacity and operational instability during the operation of high-pressure vaporizers,the core equipment of ship fuel gas supply systems,an anti-icing ultra-supercritical LNG high-pressure vaporizer with a cold-to-hot plate distribution ratio of 1:3 was designed.A test facility for studying the heat transfer and flow performance of supercritical nitrogen-50%ethylene glycol water solution(50%EGW)was constructed.The effects of cold and hot side inlet flow rates on heat transfer and flow resistance characteristics were investigated,and the freezing risk during operation was dynamically assessed.The experimental results show that when the supercritical nitrogen inlet flow rate increased from 400 kg/h to 1 000 kg/h,the maximum temperature drop at the hot side outlet reached 5.93℃,while the average heat transfer capacity and overall heat transfer coefficient increased by 147.3%and 246.9%,respectively.Concurrently,the total pressure drop on the supercritical nitrogen side increased by 160 kPa(a 57%rise in friction factor).In contrast,when the 50%EGW flow rate varied within the range of 10 669～17 071 kg/h,the heat transfer capacity remained stable,with the friction factor increasing by only 5.7%.When the hot side fluid of the high-pressure vaporizer approached the freezing state,the heat transfer performance deteriorated significantly.This study reveals the heat transfer enhancement mechanisms and flow resistance evolution laws of high-pressure vaporizers under supercritical conditions,providing a theoretical basis and data support for the structural optimization and anti-icing design of high-pressure vaporizers.关键词
高压气化器/液化天然气/传热与流动/防冻性能/超临界氮气/试验研究Key words
high-pressure vaporizer/liquefied natural gas(LNG)/heat transfer and flow/anti-freezing performance/SCN2/experimental study分类
机械制造引用本文复制引用
DONG Dandan,CHEN Yongdong,YU Gaige,LIU Xiaogen,HAN Bingchuan..LNG高压气化器流动传热试验研究[J].流体机械,2025,53(11):2-8,7.基金项目
安徽省重点研究与开发技术基础领域项目(2023z04020020) （2023z04020020）
合肥通用机械研究院有限公司青年科技基金项目(2024011182) （2024011182）
安徽省博士后资助项目(2024B825) （2024B825）
