Abstract
The Organic Flash Cycle (OFC) is suggested as a vapor power cycle that could potentially improve
the efficiency of utilization of the heat source. Low and medium temperature finite thermal sources
are considered in the cycle. Additionally the OFC’s aim is to reduce temperature difference during
heat addition. The study examines 2 different fluids. Comparisons are drawn between the OFC and
an optimized basic Organic Rankine Cycle (ORC). Preliminary results show that ethanol and water
are better suited for the ORC and OFC due to higher power output. Results also show that the single
flash OFC achieves better efficiencies than the optimized basic ORC. Although the OFC improves
the heat addition exergetic efficiency, this advantage was negated by irreversibility introduced during
flash evaporation.
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