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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

THERMAL ANALYSIS OF HEAT EXCHANGER WITH SUPERCRITICAL PRESSURE CO2

Jiangfeng Guo
Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China

Xiulan L. Huai
Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China

Keyong Cheng
Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China

Xinying Cui
Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China

Haiyang Zhang
Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China

DOI: 10.1615/IHTC16.her.022968
pages 4535-4541


KEY WORDS: Heat exchanger, Heat transfer enhancement, supercritical pressure CO2 (S-CO2), distributed coordination, optimization design.

Abstract

The parameters (heat transfer coefficient, temperature difference, heat capacity rate ratio, etc.) which are often regarded as constant in conventional heat exchanger design, vary sharply for supercritical pressure CO2 heat exchanger. There exists a peak value of total heat transfer coefficient in heat exchanger, the total heat load of heat exchanger may decrease as the peak value increases under some conditions. The vector analysis indicates that the heat load of counter- and parallel-flow heat exchanger depends not only on the values of heat transfer coefficient and temperature difference, but also on their distributed coordination, the better distributed coordination between the two parameters leads to the better performance of heat exchanger under the same other conditions. The present work may provide a novel approach optimization of heat exchanger with variable property fluids, which may be helpful for the understanding and analysis of generalized heat exchanger performance.

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