Abstract :
In this paper, the year round thermal performance evaluation of active and passive solar water heating systems for rural/urban area
have been studied. Two types experiments are the normalized draw-off temperature profile and the normalized draw-off mixing profile
conducted in the months of April 2003–March 2004. Effect of morning, mid-afternoon, evening draw-off and effect of water mixing in the
morning and evening are also studied during the experiments. Thermal efficiency for the system and collection efficiency for the collectors
were calculated during the experiments. The values of FR Æ (sa) of the collectors used in active and passive water heating systems were
found 0.69 and 0.61 respectively. Ethylene glycol has a 50/50 glycol-to-water ratio used as a heat transfer fluid (HTF) in the systems due
to the cold climate in South Korea.
2006 Elsevier Ltd. All rights reserved
