Numerical investigation flat plate solar collector performance in Baghdad base on exergy analysis

摘要

The purpose of this study is to test the solar collector in Baghdad-Iraq (33.3 north latitude, 44.2 east longitude) the energy efficiency, exergy efficiency, exergy destruction, and exergy utilisation for the flat plate collector, aluminium absorber area of 1 m~(2)and thickness of 0.25 mm, sloped angle of 40°. Energy and exergy analyses were performed, and a numerical investigation was done for climate conditions for the year 2021. All calculations were kept for 12 months, from January to December. During this year, the maximum thermal and exergy efficiency achieved for July was 77 and 58, while the minimum results found for December were 55 and 23 due to the variation of solar radiation between the summer and winter seasons. In December, the exergy dissipation ranged at 364 W/m~(2), while in April reached the maximum value of 435 W/m~(2). The high usable exergy results showed at March 303 W/m~(2), however a low result of 215 W/m~(2)in the summer months. The exergy dissipation result appeared greater than exergy use; the exergy dissipation and utilisation results are more deficient in summer, related to high heat losses to the environment.