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http://dx.doi.org/10.7316/KHNES.2015.26.6.590

Characteristics of Thermodynamic Performance of Heat Exchanger in Organic Rankine Cycle Depending on Pinch Temperature Difference  

KIM, KYOUNG HOON (Department of Mechanical Engineering, Kumoh National Institute of Technology)
JUNG, YOUNG GUAN (Department of Mechanical Engineering, Kumoh National Institute of Technology)
PARK, SANG HEE (Department of Mechanical Engineering, Kumoh National Institute of Technology)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.26, no.6, 2015 , pp. 590-599 More about this Journal
Abstract
In this paper a performance analysis is carried out based on the first and second laws of thermodynamics for heat exchanger in organic Rankine cycle (ORC) for the recovery of low-temperature finite thermal energy source. In the analysis, effects of the selection of working fluid and pinch temperature difference are investigated on the performance of the heat exchanger including the effectiveness of the heat exchanger, exergy destruction, second-law efficiency, number of transfer unit (NTU), and pinch point. The temperature distribution are shown depending on the working fluids and the pinch temperature difference. The results show that the performance of the heat exchanger depends on the pinch temperature difference sensitively. As the pinch temperature increases, the exergy destruction in the evaporator increases but the effectiveness, second law efficiency and NTU decreases.
Keywords
Low-temperature heat source; Organic Rankine Cycle; Exergy; Working fluid; Pinch temperature difference;
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Times Cited By KSCI : 4  (Citation Analysis)
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