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Enhancement in energy metrics of double slope solar still by incorporating N identical PVT collectors

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Abstract In this paper, double slope solar still has been analyzed by incorporating N identical partially covered photovoltaic thermal (PVT) collectors under optimized condition to assess the enhancement in energy… Click to show full abstract

Abstract In this paper, double slope solar still has been analyzed by incorporating N identical partially covered photovoltaic thermal (PVT) collectors under optimized condition to assess the enhancement in energy metrics. Number of collectors, mass flow rate and water depth of N identical partially covered PVT flat plate collector (N-PVT-FPC-DS) have been optimized for climatic condition of New Delhi. Subsequently, annual distillate output, energy, exergy, energy metrics, cogeneration efficiency and cost of distillate output have been computed for the proposed N-PVT-FPC-DS at 0.14 m water depth. Results obtained have been compared with results reported by previous researchers and it has been concluded that the proposed N-PVT-FPC-DS performs better than double slope solar still incorporated with N identical PVT compound parabolic concentrator collectors (N-PVT-CPC-DS) and conventional double slope solar still (CDSSS) on the basis of energy metrics and cost of distillate output. The exergy based energy payback time is lower by 74.66% and 62.62%; energy production factor is higher by 43.30% and 38.14%; life cycle conversion efficiency is higher by 48.57% and 48.57% and cost of distillate output is lower by 35.37% and 4.88% for the proposed N-PVT-FPC-DS than N-PVT-CPC-DS and CDSSS respectively.

Keywords: pvt; energy; solar still; slope solar; double slope; energy metrics

Journal Title: Solar Energy
Year Published: 2017

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