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

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

• linear parabolic collector
• solar energy
• computational fluid dynamics