LNG冷能用于冷库制冷性能模拟研究

发布时间：2018-07-08 08:35

本文选题：液化天然气 + 冷能利用　；参考：《哈尔滨工业大学学报》2017年02期

【摘要】：为使LNG冷能在冷库系统中得到有效利用,从LNG冷能梯级利用的角度出发,设计一种新型LNG冷能制冷的冷库系统,在LNG换热器端和冷库末端实现对LNG冷能的梯级利用,并通过HYSYS模拟对其进行热力学分析和经济性分析.结果表明:该冷库系统COP为1.82,火用效率为80.2%;LNG换热器火用损最大,约占系统总火用损的78.9%,且随LNG进口温度升高而减小;系统COP和火用效率均随LNG进口温度及气化压力升高而增大;该系统投资回收期为4.77 a,具有较好的经济效益.LNG冷能为冷库系统冷量来源提供新的选择,在LNG进口端增设蓄冷设备和加压泵均能提高系统COP和火用效率.
[Abstract]:In order to effectively utilize LNG cold energy in cold storage system, a new LNG cold energy refrigeration cold storage system is designed from the point of view of LNG cold energy cascade utilization, and the cascade utilization of LNG cold energy is realized at the end of LNG heat exchanger and cold storage. The thermodynamics analysis and economic analysis were carried out by HYSYS simulation. The results show that the cop of the cold storage system is 1.82, the exergy efficiency is 80.2 and the exergy loss of LNG heat exchanger is the largest, which accounts for 78.9% of the total exergy loss of the system, and decreases with the increase of LNG inlet temperature, and the system cop and exergy efficiency increase with the increase of LNG inlet temperature and gasification pressure. The investment payback period of the system is 4.77 a, which has good economic benefit. LNG cold energy provides a new choice for cold source of cold storage system. The addition of cold storage equipment and pressurized pump at the inlet of LNG can improve the cop and exergy efficiency of the system.
【作者单位】：哈尔滨工业大学热泵空调技术研究所;
【基金】：黑龙江省自然科学基金(E2015019)
【分类号】：TE96

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