Simulation of water tanks with mantle heat exchangers

A computer program for use in TRNSYS [ 1 ] has been written to simulate a water thermal storage tank with a mantle heat exchanger for use in solar domestic hot water systems. The model is based on the physics of the problem, including convective flows, heat exchange with the environment and the mantle, and conduction between the control volumes. Comparisons of the model results with experimental data show reasonable agreement.