Development and validation of a thermal model for line focus solar concentrators in water heating applications Online publication date: Wed, 17-Apr-2024
by Gunjan Kumar; Hemant Gupta
International Journal of Energy Technology and Policy (IJETP), Vol. 18, No. 6, 2023
Abstract: Solar concentrators are used to collect solar energy and convert it to heat. Line focus solar collectors operate on the principle of line focus technology where sun radiations are directed to form a line over the receiver. In this paper, thermal model of line focus collectors is developed for the application of water heating. Thermal performance parameters like useful heat flux, heat loss, water exit temperature and thermal efficiency are analysed for different solar radiations and mass flow rates. The model is validated using experimental data from a cooling plant in Seville, Spain. The results of the simulation show good agreement with the experimental data. This thermal model has been used to assess the thermal performance of the collector for the climatic conditions of Ankleshwar, Gujarat, India. The average useful heat flux, the temperature difference of water, and thermal efficiency are reported as 0.656 kW/m2, 17.64°C, and 76.10% respectively.
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