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Heat retaining integrated collector storage solar water heater with asymmetric CPC reflector

Souliotis, Manolis, Quinlan, Patrick, Smyth, Mervyn, Tripanagnostopoulos, Yiannis, Zacharopoulos, Aggelos, Ramirez, Miguel and Yianoulis, Panagiotis (2011) Heat retaining integrated collector storage solar water heater with asymmetric CPC reflector. Solar Energy, 85 (10). pp. 2474-2487. [Journal article]

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URL: http://www.sciencedirect.com/science/article/pii/S0038092X11002477

DOI: 10.1016/j.solener.2011.07.005


A novel integrated collector storage solar water heater (ICSSWH) was designed, optically analysed and experimentally studied. The unit was based around a heat retaining ICS vessel design consisting of two concentric cylinders mounted horizontally inside a stationary truncated asymmetric compound parabolic concentrating (CPC) reflector trough. The annulus between the cylinders was partially evacuated and contained a small amount of water, which changed phase at low temperature, producing a vapour and creating a thermal diode transfer mechanism from the outer absorbing surface to the inner storage vessel surface. The absorbing outer vessel surface covered with selective absorber film and was partially exposed to solar radiation. The remaining vessel surface area (including the vessel ends) was thermally insulated to improve heat retention during the night. Curved reflectors with a high reflectance along with high transmittance glazing were also used to improve effective operation of the ICS system. The thermal behaviour of the ICS system was compared to that of a Flat Plate Thermosiphonic Unit (FPTU). The experimental results showed that the ICS system is as effective during daily operation as it is during the night. Furthermore, the thermal loss coefficient during night gives similar values between the ICS system and FPTU.

Item Type:Journal article
Keywords:Integrated collector storage solar water heaters (ICSSWH); Compound parabolic concentrating (CPC) reflector troughs; Optical study; Thermal performance
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute > Centre for Sustainable Technologies (CST)
Built Environment Research Institute
ID Code:19856
Deposited By: Dr Aggelos Zacharopoulos
Deposited On:07 Sep 2011 14:59
Last Modified:07 Sep 2011 14:59

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