Measuring for solar heat gain through glass windows with shading system

On the basis of heat balance theory, an outdoor test facility used to measure the solar heat gain through glass windows with shading system is presented. The solar heat gain was obtained by measuring electric heater power and fan power, calculating the fan-coil unit heat transfer and the heat transfer through the envelopes. The numerical model on the basis of solar heat gain was built and the experimental result was validated. The experimental data prove that the test facility can be effectively used to measure the solar heat gain through glass windows with shading system. With a specific blade angle in the shading system, the indoor solar heat gain can be reduced by over 30% on a typical day of the first ten days of November in Shanghai.