Active solar shading

Solar shading can be used to decrease the cooling power demand and cooling energy use but that also reduces the possible benefit for heating with the incoming solar radiation when there is a heating need. The apparent solution is to shade when there is a cooling need and allow solar gains when there is a heating need. This paper presents energy use simulations on such a system set up in a theoretical office cell and a theoretical apartment in southern Sweden showing remarkable decrease in energy use for heating and cooling, or too high over indoor temperatures.