Abstract
This study focuses on the thermodynamic analysis of the high-temperature recuperative organic Rankine cycle with a water heating system, which can provide a net power of 585.7kW and hot water for domestic purposes at 35°C. The performance was analyzed using seasonal ambient temperature and water temperature reports of Seoul, South Korea. Besides the turbine 1 outlet the working fluid is divided into two different mass fractions, thus one provides heat to recuperated (R-ORC) ORC and another part is passed to the water heating system to heat the water. The mass fractions are balanced based on the projected seasonal urge for hot water. Out of four working fluids with high critical temperature for the top cycle and five working fluids with low critical temperature for the bottom cycle, Chlorobenzene is selected for the top cycle and pentane is used for the bottom cycle. The system achievement in individual months is analyzed using thermal efficiency and exergy efficiency. The comparison in the performance of both the hottest (when the urge for hot water is low) and coldest (when the urge for hot water is high) months was also analyzed.
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