A proposed standard test code for the determination of the efficiency of solar water heaters of the flat collector type

Abstract The properties which must be considered in obtaining an objective estimate of the quality of a flat-plate-type solar water heater are listed. Methods are given for calculating the aerial, orientation, and thermal efficiency of the heater and the heat storage coefficient. A test procedure is outlined for making an objective standard determintion of the efficiency of the heater, and a standardized sheet form is given on which the results can be tabulated.