Analysis of solar water heater with parabolic dish concentrator and conical absorber

29th Symposium of Malaysian Chemical Engineers 2016

Rajamohan, G.^1 ; Kumar, P.^2 ; Anwar, M.^1 ; Mohanraj, T.^3

Department of Mechanical Engineering, Curtin University Malaysia, CDT 250, Sarawak, Miri

98009, Malaysia^1

Department of Chemical Engineering, Curtin University Malaysia, CDT 250, Sarawak, Miri

98009, Malaysia^2

Department of Mechanical Engineering, Sastra University, Tamilnadu, Thanjavur

613403, India^3

关键词: Absorber tubes;    Buoyancy effect;    Enhanced heat transfer;    Novel techniques;    Parabolic dish concentrator;    Research focus;    Solar water heating systems;    Water heating systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/206/1/012030/pdf
DOI  :  10.1088/1757-899X/206/1/012030

来源: IOP

【 摘 要 】

This research focuses on developing novel technique for a solar water heating system. The novel solar system comprises a parabolic dish concentrator, conical absorber and water heater. In this system, the conical absorber tube directly absorbs solar radiation from the sun and the parabolic dish concentrator reflects the solar radiations towards the conical absorber tube from all directions, therefore both radiations would significantly improve the thermal collector efficiency. The working fluid water is stored at the bottom of the absorber tubes. The absorber tubes get heated and increases the temperature of the working fluid inside of the absorber tube and causes the working fluid to partially evaporate. The partially vaporized working fluid moves in the upward direction due to buoyancy effect and enters the heat exchanger. When fresh water passes through the heat exchanger, temperature of the vapour decreases through heat exchange. This leads to condensation of the vapour and forms liquid phase. The working fluid returns to the bottom of the collector absorber tube by gravity. Hence, this will continue as a cyclic process inside the system. The proposed investigation shows an improvement of collector efficiency, enhanced heat transfer and a quality water heating system.