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Thermodynamic Performance and Optimization Analysis of a Modified Organic Flash Cycle for the Recovery of Low-Grade Heat
- Authors
- Kim, Kyoung Hoon
- Issue Date
- 1-Feb-2019
- Publisher
- MDPI
- Keywords
- organic flash cycle; regeneration; two-phase expander; low-grade heat source; efficiency; optimization
- Citation
- ENERGIES, v.12, no.3
- Journal Title
- ENERGIES
- Volume
- 12
- Number
- 3
- ISSN
- 1996-1073
- Abstract
- The recently proposed organic flash cycle (OFC) has the potential for the efficient recovery of low-grade heat, mainly due to the reduction of irreversibilities in the heat input unit. In the present study, a modified OFC (OFCM) employing a two-phase expander (TPE) and regeneration is proposed and thermodynamic and optimization analysis on this cycle is conducted compared with the basic OFC (OFCB). Six substances are considered as the working fluids. Influences of flash temperature, source temperature, and working fluid are systemically investigated on the system performance. Results showed that OFCM is superior to OFCB in the aspects of power production, thermal, and second-law efficiencies.
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