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Comparison of Performance Characteristics with Heat Exchanger Type in $CO_2$ Cycle  

Bae, Kyung-Jin (Graduate School of Mechanical Engineering, Chosun University)
Cho, Hong-Hyun (Department Mechanical Engineering, Chosun University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.22, no.10, 2010 , pp. 657-664 More about this Journal
Abstract
The theoretical analysis of performance characteristics in a $CO_2$ cycle with the heat exchanger type was carried out. The size and performance of the fin-tube and microchannel heat exchanger were compared with operating conditions. As a result, the performance of the fin-tube gascooler and evaporator were more sensitive to the variation of operating condition compared to that of the microchannel gascooler and evaporator. Beside, the sizes of microchannel gascooler and evaporator could be decreased by 73% and 76%, respectively, compared to those of the fin-tube type gascooler and evaporator with the similar capacity. The COP and reliability of the $CO_2$ system can be increased by using a microchannel heat exchanger.
Keywords
$CO_2$ cycle; Fin-tube heat exchanger; Microchannel louver fin heat exchanger;
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