Entropy Analysis and Optimization of Phase Transition Heat Exchangers

Abstract:

Entropy analysis method was adopted to analyze and optimize a jacketed pipes-type heat pipe steam generator. In the entropy analysis process, the entropy production resulted from the total temperature difference across the heat exchanger, the entropy production from main heat transfer element – heat pipes and the entropy production caused by the pressure drop due to working media flow on cold and hot sides were taken into consideration. In the calculation, the entropy production in all parts of the heat exchanger was analyzed row by row in a discrete pattern, except for the entropy production due to pressure drop on flue gas side. Analysis results show that for the heat exchanger in this case, the proportions of entropy production in the above-mentioned three parts are respectively 74.79%, 21.75% and 3.46%. On this basis, the article also made optimizing analysis with the cold and hot source temperature, heat pipe length and No. of heat pipe rows as parameters, to provide theoretical basis for further improving the energy efficiency of heat exchangers.

• Periodical: Advanced Materials Research (Volumes 516-517)
• Pages: 276-283
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.516-517.276
• Online since: May 2012
• Authors: Jian Wang, Hu Chen, Hong Biao Huang, Han Zhong Tao
• Keywords: Entropy Analysis, Heat Exchanger, Heat Pipe, Phase Transition

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