主冷凝蒸发器温差和液体膨胀机对空分能耗的影响
摘要: 本文对空分流程工程师非常关心的主冷温差和液体膨胀机对能耗的影响进行了火用分析，并且明确指出：1）主冷凝蒸发器温差每减少1 K，空分将会节省0.0478 X Q的能耗，这里Q是主冷凝蒸发器的换热量。2）液体膨胀机的使用将会节省4.7倍于自身轴功率的能耗。
关键词:火用；有效能；火用损；空分流程；功耗；主冷；主冷凝蒸发器；温差；液体膨胀机；氧气；氮气；液氧；液氮
Air Separation Unit Energy Consumption Impact of
Main Vaporizer Temperature Approach and Liquid Expander
Abstract: The Air Separation Unit energy consumption impact, because of the main vaporizer temperature approach and the use of liquid expander, is analyzed with the EXERGY method. Two conclusions are made: 1) Energy will be saved by 0.0478 X Q, when you reduce the main vaporizer temperature approach by 1 K, where Q is the main vaporizer duty. 2) The use of a liquid expander will save energy 4.7 times of the liquid expander shaft power.
Keywords: Exergy; Available energy; Exergy loss; Air separation process; Power consumption; Main vaporizer; Temperature approach; Liquid expander；oxygen; nitrogen; liquid oxygen; liquid nitrogen
