Thermofluid Numerical simulation of the flat solar heating transpired collector for drying purposes

علوم کاربردی و محاسباتی در مکانیک

Volume 34, Issue 1 - Serial Number 27, June 2022, Pages 61-80   

Document Type: Original Article

DOI: 10.22067/jacsm.2022.75507.1104

Authors

mohammad saleh barghi jahromi¹; vali kalantar^{* 1}; mohammad sefid¹; Masoud Iranmanesh²; Hadi Samimi Akhijahani³

¹Faculty of Mechanical Engineering, Yazd University, Yazd, Iran

²Department of Energy, Institute of Science and High Technology and Environmental Sciences, Kerman Graduate University of Advanced Technology, Kerman, Iran.

³Department of BioSystems Engineering, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran.

Abstract

the flat solar heating transpired collector can be used for heat buildings and large spaces, industrial applications, and drying of agricultural products. The flow structure and convection heat transfer mechanisms are very important to the air performance of uncovered flat solar heating transpired collector. In these solar air heaters, the air is usually heated by a perforated absorber plate (metal). In this research, copper adsorbent plate has been used and numerical simulation has been performed for mass flow rate (0.007, 0.01, 0.0125, 0.015) kg/s. In order for the simulation to be consistent with the physical reality of the problem, the simulation is three-dimensional, non-continuous with a large computational range and continuous suction. Thermal efficiency, mass flow rate, and outlet temperature parameters were investigated. According to the obtained results, with decreasing mass flow rate, the temperature of the absorber plate and consequently the temperature of the outlet air increases; But increasing the temperature of the absorber plate is more than increasing the temperature of the outlet air. As the mass flow rate increases, the thermal efficiency of the flat solar heating transpired collector increases. The lowest efficiency in mass flow rate is 0.007 kg / s with 66.51 % and the highest efficiency in mass flow rate is 0.015 kg / s with 78.02 %.

Keywords

Solar Energy; Unglazed transpired flat plate solar collector; Thermofluid numerical; Thermal efficiency

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