Exergy Analysis of Cascade Ethylene-Propane Rankine Cycle with Cold Energy Recovery of LNG

Abstract:

Cascade Rankine power cycle is suitable for cold recovery in a CCHP system which uses LNG as the primary energy. It has the advantages of low operating pressure and high energy efficiency. Exergy analysis of a typical cascade ethylene-propane Rankine power cycle is conducted. The results show that the exergy losses mainly occur in the low temperature part of the cycle. The exergy loss in the LNG-ethylene heat exchanger could reach about 46% of the total exergy loss. Therefore, the reduction of the exergy losses in the low temperature is important for the improvement of the performance of cascade power cycle.

• Periodical: Applied Mechanics and Materials (Volumes 170-173)
• Pages: 2489-2493
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.170-173.2489
• Online since: May 2012
• Authors: Hong Mei Zhu, Hong Wei Liu, Heng Sun
• Keywords: Cascade Cycle, Cold Recovery, Exergy Analysis, LNG

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DOI: 10.4028/www.scientific.net/amr.446-449.2895