Research of organic Rankine cycle utilizing LNG cold exergy and waste heat

被引：0

作者：

Rao, Wen-Ji ^{[1
]}

Zhao, Liang-Ju ^{[1
]}

Liu, Chao ^{[1
]}

Xu, Jin-Liang ^{[2
]}

Zhang, Mo-Geng ^{[1
]}

机构：

[1] Key Laboratory of Low-Grade Energy Utilization Technologies and Systems of Ministry of Education, Chongqing 400030, China

[2] School of Renewable Energy, North China Electric Power University, Beijing 102206, China

来源：

Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | 2014年 / 35卷 / 02期

关键词：

Industrial research - Waste heat utilization - Evaporation - Fluids - Exergy - Temperature - Thermoanalysis - Waste heat - Heat exchangers - Heat transfer;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In this paper, the cold exergy of LNG and industrial waste heat are connected to be recovered using organic Rankine cycle, in which ethane is selected as working fluid. Thermodynamic analysis for the cycle is done in detail. The results show that both cycle thermal efficiency and work output increase as the increase of evaporation pressure. When the outlet temperature of evaporator is lower than 240°C and the value of evaporation pressure is much high, negative pinch point temperature which is not allowed will appear in the condenser. It means that heat exchange amount in the condenser is not enough for LNG to achieve the final supplied temperature. Therefore, when utilizing industrial waste heat lower than 260°C and cold exergy of LNG, in order to avoid insufficient heat transfer at high pressure for the condenser, a heat exchanger should be added to the original cycle.

引用

页码：213 / 217