Simulating and Evaluating the Effects of Air Passing through a Linear Parabolic Solar Collector on Some Properties of Leaving Air

Document Type : Original Research

Authors

Department of Mechanics of Biosystems Engineering, Tarbiat Modares University, Tehran, Iran

Abstract

In the current energy and environmental conditions, it is necessary to implement systems based on renewable energy sources in order to reduce energy consumption worldwide. Solar collectors have been studied for years, and many researchers have focused their attention on increasing their efficiency and cost-effectiveness. Solar collectors are implemented for heating domestic water, heating or industrial processes. A promising system that is not yet widely known is air heating by solar collectors, which can be an efficient way to use solar energy with lower investment costs, a system that can preheat the fresh air needed for heating, drying. In this research, the air was established between the absorbent space and its glass cover at speeds of 2, 4, and 6 m/s using a fan, and the effect of incoming air speed and weather conditions such as solar radiation intensity, wind speed, and ambient temperature on the outlet air temperature from the collector and the absorber rod temperature were checked. Based on the obtained results, the temperature of the air coming out of the collector and the temperature of the absorber decreases with the increase in the speed of the incoming air. The greatest impact of weather conditions on the temperature of the absorber rod is related to the intensity of the sun's radiation. The numerical analysis results were obtained with an error of 5% compared to the experimental results.

Keywords


Bjerg, B, Svidt, K, Zhang, G, Morsing, S and Johnsen (2002). Modeling of air inlets in CFD prediction of airflow in ventilated animal houses. Computers electronics in agriculture, 34, 223-235.
Desisa, DG and Shekata, GD (2020). Performance Analysis of Flat-Plate and V-groove Solar Air Heater Through CFD Simulation. International Journal of Renewable Energy Development, 9.
El Ghazzani, B, Plaza, DM, El Cadi, RA, Ihlal, A, Abnay, B and Bouabid, K (2017). Thermal plant based on parabolic trough collectors for industrial process heat generation in Morocco. Renewable energy, 113, 1261-1275.
Fudholi, A, Sopian, K, Ruslan, MH and Othman, MY (2013). Performance and cost benefits analysis of double-pass solar collector with and without fins. Energy conversion and management, 76, 8-19.
Iranmanesh, M, Akhijahani, HS and Jahromi, MSB (2020). CFD modeling and evaluation the performance of a solar cabinet dryer equipped with evacuated tube solar collector and thermal storage system. Renewable Energy, 145, 1192-1213.
Kutscher, C, Burkholder, F and Kathleen Stynes, J (2012). Generation of a parabolic trough collector efficiency curve from separate measurements of outdoor optical efficiency and indoor receiver heat loss. Journal of solar energy engineering, 134.
Lovegrove, K and Stein, W (2012). Concentrating solar power technology: principles, developments and applications.
Omojaro, A and Aldabbagh, L (2010). Experimental performance of single and double pass solar air heater with fins and steel wire mesh as absorber. Applied energy, 87, 3759-3765.
Singh, AP and Singh, O (2018). Performance enhancement of a curved solar air heater using CFD. Solar Energy, 174, 556-569.
Stefanovic, VP and Pavlovic, SR (2011). Mathematical model and numerical simulation of cpc-2v concentrating solar collector. a a, 3, 4.
Yadav, AS and Bhagoria, J (2013). Heat transfer and fluid flow analysis of solar air heater: A review of CFD approach. Renewable Sustainable Energy Reviews, 23, 60-79.
Yaghoubi, M and Mokhtari, A (2007). ermo-