Some theoretical and experimental aspects of built-in solar storage
Abstract:
The possibility of using a built-in storage solar water heater in Jordan has been investigated. Experimental and theoretical results were obtained using a 90 × 90 × 10 cm solar heater which was tilted at an angle of 30° to the horizontal.
It was found that the efficiency of the built-in storage solar heater may reach as high as 78% with a maximum increase in the water temperature of 70°C and at low cost compared to the conventional flat plate collector. It is therefore expected that such solar system may be used to provide reasonably sufficient hot water in Jordan. Analytical solution, based on the assumption that the water temperature equals that of the plate, was used to solve the governing equations. While a numerical solution was used to solve the equations under the condition that the plate temperature is not equal to that of the water.
It was found that the assumption of the temperature of the plate (Tp) is equal to the temperature of water (Tw) is only justifiable at early hours of operation in the morning.
URL: http://www.sciencedirect.com/science/article/pii/096014819290041Z