Authors : Hassan Albusairi; Husain Qumber

Volume/Issue : Volume 8 - 2023, Issue 12 - December

Google Scholar : https://tinyurl.com/2p8sjyz3

Scribd : https://tinyurl.com/35fbb3hh

DOI : https://doi.org/10.5281/zenodo.10403885

Abstract : The Evacuated tube solar heater (EVH) consists of parallel tubes made of reinforced glass (transparent) which are installed inside steel frame and connected to a collector(manifold). These tubes are two concentric tubes with vacuum clearance between each other to avoid the heat loss.The absorber plate is connected to the inner heater tube in order toincrease and concentrate the sun radiation on the inner tube to increase the heat transfer. The absorber plate can be made of aluminum, copper, silver, or nickel. The experimental setup consisted of 20 parallel evacuated tubes, connected to horizontal tank. It is required to heat the domestic water. The tests were carried out from February to September and the water outlet temperature was measured at different days and times and comparisons were applied for each absorber plate material. Finally, it was concluded that the copper absorber plate has higher efficiency, satisfied water outlet temperature, and reasonable cost.

Keywords : Evacuated tube, solar heater, absorber plate, solar heater efficiency, domestic water heating.