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Descripción
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| Energy security, pollution and sustainability are majar challenges presently facing the intemational community ,in response to which increasing quantities of renewab le energy are to be generated in the urban environment. Consequently, recent years have seen a strong increase in the uptake of solar technologies in the building sector. In this work, the potential of a solar combined heat and power (CHP) system based on an organic Rankine cycle (ORC) engine is investigated in a domestic setting. Unlike previous studies that focus on the optimisation of the ORC subsystem, this study performs a complete system optimisation considering both the design parameters of the solar collector array and the ORC engine simultaneously. Firstly, we present thermodynam ic models of different collectors, including flat-plate and evacuated-tube designs, coupled to a non-recuperative sub-critica! ORC architecture that delivers power and hot water by using thermal energy rejected from the engine. Optimisation of the complete system is first onducted, aimed at identify ing operating conditions for which the power output is maxim ised. Then, hourly dynamic simulations of the optimised system configurations are performed to complete the system sizing. Results are presented of: (i) dynamic 3-D simulations of the solar collectors together with a thermal energy storage tank, and (ii) of an optimisation analysis to identify the most suitable working fluids for the ORC engine, in which the configuration and operational constraints of the collector array are considered. The best performi ng working fluids (R245fa and R1233zd) are then chosen for a whole-system annual simulation in a southem European climate. | |
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Internacional
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Si |
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JCR del ISI
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Si |
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Título de la revista
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Applied Energy |
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ISSN
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0306-2619 |
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Factor de impacto JCR
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7,9 |
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Información de impacto
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Volumen
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228 |
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DOI
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10.1016/j. apenergy.2018.06.059 |
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Número de revista
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Desde la página
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755 |
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Hasta la página
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765 |
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Mes
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SIN MES |
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Ranking
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