heal.abstract |
A mathematical model has been developed, which simulates the operation of one tank forced circulation solar water heaters, based on a finite-difference solution of the one-dimensional transient heat transport equation by convection and conduction along the prevailing direction of the storage tank. By applying the developed procedure over a wide range of conditions, a large number of predictions has been obtained, which showed that the optimum ratio of collector to mean load mass flow rates (m ̇c/{A figure is presented}1)opt, i.e. that which maximizes the performance of the system, varies from 0.4 to 1.4 and can be expressed as a function of the ratio of the mean load mass flow rate to collector area, {A figure is presented}1/Ac, only. By correlating the numerous predictions obtained, the function (m ̇c/{A figure is presented}1)opt = f({A figure is presented}1/Ac) is developed and presented. The proposed correlation provides a simple and quick way of estimating, with an accuracy which is satisfactory for practical applications, the optimum collector flow rate in one tank forced circulation solar water heaters, using as the only data the mean load mass flow rate and the collector area. © 1991. |
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