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저등급 열원 활용을 위한 수정 유기플래시 사이클(OFC)의 성능 특성에 관한 연구Study on Performance Characteristics of a Modified Organic Flash Cycle (OFC) for Recovery of Low-Grade Heat Source
- Other Titles
- Study on Performance Characteristics of a Modified Organic Flash Cycle (OFC) for Recovery of Low-Grade Heat Source
- Issue Date
- 2019
- Publisher
- 대한설비공학회
- Keywords
- Low-grade heat source(저등급 열원); Organic flash cycle(유기플래시 사이클); Regeneration(재생); Two-phase expander(이상팽창기); Working fluid(작동유체)
- Citation
- 설비공학 논문집, v.31, no.1, pp 13 - 21
- Pages
- 9
- Journal Title
- 설비공학 논문집
- Volume
- 31
- Number
- 1
- Start Page
- 13
- End Page
- 21
- ISSN
- 1229-6422
- Abstract
- This paper proposes a modified organic flash cycle (OFC) employing a two-phase expander and regeneration for recovery of low-grade heat source. The following working fluids were considered; R134a, R152a, propane, isobutane, butane, R245fa, R123, isopentane, and o-xylene. The effects of the selection of working fluid and flash temperature on the systems’ performance including heat input rate, net power production, and system thermal efficiency were investigated. The results showed that while the net power production peaked with respect to flash temperature, the system thermal efficiency increased with flash temperature. Both of them were maximum when the working fluid was o-xylene. The modified OFC system shows a potential for performance improvement as compared to the basic OFC.
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