Heat collection performance analysis of corrugated flat plate collector: An experimental study. (January 2022)

• Record Type: Journal Article
• Authors: Liu, Yan; Tan, Chenchen; Jin, Yingai; Ma, Shihong
• Is Part Of: Renewable energy. Volume 181(2022)
• Page Start: 1
• Page End: 9
• Publication Date: 2022-01
• Subjects: Corrugated flat plate collector -- Heat collection -- Heat collection efficiency -- Experimental analysis; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2021.09.001
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: Heat collection through flat plate collector is a common technology in solar thermal utilization. In order to improve the heat collection efficiency of flat plate collector and determine the best inclination angle and glass plate thickness, this paper establishes a collector indoor experimental system, and completes the research of solar radiation intensity, collector inclination angle, mass flow rate and glass thickness on the heat collection performance of corrugated flat plate collector. The result shows that when radiation intensity is 510W/m 2, the temperature difference between the inlet and outlet in the radiation decreasing stage is 0.25 °C higher than the radiation increasing stage, and the heat collection in the radiation decreasing stage is 157.5W higher than the radiation increasing stage. The heat collection efficiency under different inclination angles decreases with the increase of radiation intensity, the best inclination angle of the collector is 45° and the maximum heat collection efficiency is 0.89. When the radiation intensity is more than 1000W/m 2, heat collection of flat plate collector with glass thickness of 8 mm is 6% higher than that with the thickness of 6 mm, insulating effect of the glass is more obvious. The optimum thickness of the glass plate is 4 mm, the maximum temperature difference is 1.5 °C and the maximum heat collection efficiency is 0.89. The heat collection efficiency at different mass flow rates increases first and then decreases with the increase of radiation intensity. The maximum value of the heat collection efficiency at low mass flow rate is delayed. When the mass flow rate is 0.15 kg/s, 0.13 kg/s and 0.1 kg/s, the maximum heat collection efficiency is 0.89, 0.86 and 0.73, respectively; and the corresponding radiation intensity are 670W/m 2, 850W/m 2 and 1000W/m 2, respectively. Highlights: Heat collection performance analysis of corrugated flat plate collector was studied. Temperature difference during the descending stage of radiation intensity is greater. The greater radiation intensity, the more obvious insulating effect of the glass. There is apparent delay in the maximum efficiency value of the low mass flow rate. .