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

KYOUNG HOON KIM | Zendy; Young Guan Jung | Zendy; Sang Hee Park | Zendy

Open Access

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

Author(s) -

KYOUNG HOON KIM,

Young Guan Jung,

Sang Hee Park

Publication year - 2015

Publication title -

journal of hydrogen and new energy

Language(s) - English

Resource type - Journals

eISSN - 2288-7407

pISSN - 1738-7264

DOI - 10.7316/khnes.2015.26.6.590

Subject(s) - pinch point , organic rankine cycle , heat exchanger , thermodynamics , evaporator , pinch , exergy , degree rankine , working fluid , heat transfer , exergy efficiency , heat recovery ventilation , materials science , mechanics , nuclear engineering , mechanical engineering , waste heat , engineering , physics

>> 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.

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