유기랭킨사이클의 성능에 미치는 내부열교환기의 영향Effects of Internal Heat Exchanger on Performance of Organic Rankine Cycles
- Other Titles
- Effects of Internal Heat Exchanger on Performance of Organic Rankine Cycles
- Authors
- 김경훈; 정영관
- Issue Date
- 2011
- Publisher
- 한국수소및신에너지학회
- Keywords
- Organic rankine cycle; Transcritical cycle; Internal heat exchanger; Thermal performance; 유기랭킨사이클; 천이임계 사이클; 내부열교환기; 열적 성능
- Citation
- 한국수소및신에너지학회논문집, v.22, no.3, pp 402 - 408
- Pages
- 7
- Journal Title
- 한국수소및신에너지학회논문집
- Volume
- 22
- Number
- 3
- Start Page
- 402
- End Page
- 408
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/23115
- ISSN
- 1738-7264
- Abstract
- Organic Rankine cycles (ORC) can be used to produce power from heat at different temperature levels available as geothermal heat, as biogenic heat from biomass, as solar or as waste heat. In ORC working fluids with relatively low critical temperatures and pressures can be compressed directly to their supercritical pressures and heated before expansion so as to obtain a better thermal match with their heat sources. In this work thermal performance of ORC with and without an internal heat exchanger is comparatively investigated in the range of subcritical and transcritical cycles. R134a is considered as working fluid and special attention is paid to the effect of turbine inlet pressure on the characteristics of the system. Results show that operation with supercritical cycles can provide better performance than subcritical cycles and the internal heat exchanger can improve the thermal efficiency when the temperature of heat source becomes higher.
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Collections - Department of Mechanical Engineering > 1. Journal Articles
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