Energy analysis of solar collector with perforated absorber plate

Abstract EN

The thermal performance of three solar collectors with 3, 6 mm holes and without perforation absorber plate was experimentally assessed.

The experimental tests were implemented in Baghdad during January and February 2017.

Five values of airflow rates range between 0.01 – 0.1 m3/s were used through the test with a constant airflow rate during the test day.

The variation of the following parameters was recorded every 15 minutes air temperature difference, useful energy, absorber plate temperature, and collector efficiency.

The experimental data reported that the number of absorber plate perforations with a small diameters is more efficient than increasing the hole diameters of the absorber plate with decreasing the perforation numbers.

The maximum air temperature difference throughout the solar collector with 3, 6 mm perforations and without perforations were 17, 15, and 12 oC, respectively.

Also, it can be conclude that the energy gained from the solar collector with 3 mm perforation absorber plate is 28.2 % higher than the energy gained from solar collector without holes per day for 0.1 m3/s airflow rate.

The maximum values of the thermal performance curves were 67 %, 64 %, and 56 % for the solar collector with 3, 6 mm, and without perforations, respectively.