A theoretical and experimental investigation of a novel built-in-storage solar water heater

In this work, a novel built-in-storage type of solar water heater has been investigated theoretically and experimentally under thermosyphon mode with no drawoff. In the theoretical study, transient performance of the system is predicted by solving the mathematical model consisting of energy balance equations written for each control volume comprising one length of pipe. These equations are converted to finite difference from and then solved by a digital computer. The experiments have been performed inside the laboratory using an artificial sun consisting of twenty seven lamps. The water temperatures were measured at various locations in the system. The experimental results were compared with the numerical ones.

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