The effect of tinted window on daylighting and cooling load in building / Stacy Jelnis

Malaysia country was a tropical climate, the temperatures are quite hot. In this country the energy consumptions (kWh) for the air-conditioner is very high, it is needed to use alternative ways to reduce energy consumption (kWh) for cooling load. Most of the building was using a tinted window to control the daylighting levels and to reduce cooling load energy consumption (kWh)in the building. Malaysian Standard which is based on research suggesting people set the lowest temperature with only 24 ° C for the conservation of energy (kWh). This is a good step in order to reduce energy consumption but using the tinted window at the same time will save more energy (kWh). The shading devices such as tinted windows with the properties of shading coefficient (SC) and visible light transmission (VLT) are surely affecting the daylighting level sand energy consumption inside buildings. Therefore, this study is aiming to further complement the research done, by evaluating the benefits of using tinted windows to optimize the daylight while reducing the cooling load at the same time. This study carried out at UiTM Shah Alam test building with the method of field data and computer simulation using energy software. The test building equipped with an air-conditioner that has a power factor value of -0.989 and set with24°C. Four systems with different types of tinted window type 4, 5, 6, and 7 test for about 8days to get the data of daylight intensity (Lux) and energy consumption for the cooling load (kWh)inside the building. The result was compared with the control system (without tinted window) to determined the percentage of energy savings (%) for each type of tinted window.