Integration of Low-level Waste Heat Recovery and Liquefied Nature Gas Cold Energy Utilization

›› 2008, Vol. 16 ›› Issue (1): 95-99.

• SELECTED PAPERS FROM THE 4^th INTERNATIONAL SYMPOSIUM ON DESIGN, OPERATION AND CONTROL OF CHEMICAL PROCESSES • Previous Articles Next Articles

Integration of Low-level Waste Heat Recovery and Liquefied Nature Gas Cold Energy Utilization

BAI Feifei, ZHANG Zaoxiao

School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Received:2007-04-28 Revised:2007-10-27 Online:2008-02-28 Published:2008-02-28
Supported by:
the Science and Technology Foundation of Shaanxi Province (No.2002K08-G9).

Integration of Low-level Waste Heat Recovery and Liquefied Nature Gas Cold Energy Utilization

白菲菲, 张早校

School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

通讯作者: ZHANG Zaoxiao, E-mail: zhangzx@mail.xjtu.edu.cn
基金资助:
the Science and Technology Foundation of Shaanxi Province (No.2002K08-G9).

Abstract

Abstract: Two novel thermal cycles based on Brayton cycle and Rankine cycle are proposed, respectively, which integrate the recovery of low-level waste heat and Liquefied Nature Gas (LNG) cold energy utilization for power generation. Cascade utilization of energy is realized in the two thermal cycles, where low-level waste heat, low-temperature exergy and pressure exergy of LNG are utilized efficiently through the system synthesis. The simulations are carried out using the commercial Aspen Plus 10.2, and the results are analyzed. Compared with the conventional Brayton cycle and Rankine cycle, the two novel cycles bring 60.94% and 60% in exergy efficiency, respectively and 53.08% and 52.31% in thermal efficiency, respectively.

Key words: recovery of low-level waste heat, LNG cold energy utilization, power generation, cascade utilization

摘要： Two novel thermal cycles based on Brayton cycle and Rankine cycle are proposed, respectively, which integrate the recovery of low-level waste heat and Liquefied Nature Gas (LNG) cold energy utilization for power generation. Cascade utilization of energy is realized in the two thermal cycles, where low-level waste heat, low-temperature exergy and pressure exergy of LNG are utilized efficiently through the system synthesis. The simulations are carried out using the commercial Aspen Plus 10.2, and the results are analyzed. Compared with the conventional Brayton cycle and Rankine cycle, the two novel cycles bring 60.94% and 60% in exergy efficiency, respectively and 53.08% and 52.31% in thermal efficiency, respectively.

关键词: recovery of low-level waste heat, LNG cold energy utilization, power generation, cascade utilization

BAI Feifei, ZHANG Zaoxiao. Integration of Low-level Waste Heat Recovery and Liquefied Nature Gas Cold Energy Utilization[J]. , 2008, 16(1): 95-99.

白菲菲, 张早校. Integration of Low-level Waste Heat Recovery and Liquefied Nature Gas Cold Energy Utilization[J]. , 2008, 16(1): 95-99.

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Integration of Low-level Waste Heat Recovery and Liquefied Nature Gas Cold Energy Utilization

Integration of Low-level Waste Heat Recovery and Liquefied Nature Gas Cold Energy Utilization

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