Solar energy contribution (or solar fraction) increases with the ratio of storage tank/collector area to its optimum value at 15 (l/m2).
Considering the collector aperture area (3.6 m2 in this study), the optimum size of the thermal storage tank is around 54 litre. The thermal storage tank, shown in Figure 4, is a coil heat exchanger tank with outer surface insulation covered by metal drum. The tank, which is mounted on a stand next to the collector consists of a copper tube coil immersed in a water tank, a pressure gauge, a temperature measurement probe and a 40 W DC water pump is used to circulate the working fluid (distilled water) between the receiver and thermal storage tank heat exchanger coil.
Solar energy contribution (or solar fraction) increases with the ratio of storage tank/collector area to its optimum value at 15 (l/m2). Considering the collector aperture area (3.6 m2 in this study), the optimum size of the thermal storage tank is around 54 litre. The thermal storage tank, shown in Figure 4, is a coil heat exchanger tank with outer surface insulation covered by metal drum. The tank, which is mounted on a stand next to the collector consists of a copper tube coil immersed in a water tank, a pressure gauge, a temperature measurement probe and a 40 W DC water pump is used to circulate the working fluid (distilled water) between the receiver and thermal storage tank heat exchanger coil.
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