Abstract
AbstractIn order to increase the performance of solar collectors, multipurpose solar collectors were investigated experimentally by combining the solar water collector and solar air collector. In this design, the storage tank of the conventional solar water collector is modified as riser tubes and header, which is fitted in the bottom of the solar air heater. These were tested as a solar water heater and air heater simultaneously with both load and no load conditions. The results reveal that the maximum efficiency was 67.69% for the mass flow rate of 0.015 kg/s in the multipurpose water heater. The maximum efficiency of multipurpose solar air heater was reached as 85.1% at 14:00 hour for the mass flow rate of 0.0104 kg/s at load condition. The maximum stagnation temperature of the multipurpose solar air heater was 88°C for the overall heat loss co-efficient of 12.83 W/m2-K at no load condition. The heat removal factor based on the air inlet and outlet temperature, as well as the collector efficiency fa...
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