Abstract
Cooling energy savings in a building with the roof coated with high-reflectance paint are examined. It is difficult to recognize such savings using the data observed hourly. Among the factors assumed to affect cooling energy load are: (1) internal heat generation, (2) set temperature, and (3) weather conditions. By analyzing the relationship between indoor-outdoor air temperature difference (averaged) and electric power consumption (integrated) of the air conditioner in the building over a day, the reduction in electric power consumption due to the use of a high-reflectance paint coating is estimated at approximately 72 Wh·m−2·day−1.
Highlights
Nowadays, high-reflectance paint is gaining popularity in Japan for mitigating the heat island phenomenon
The effect of such paint on the mitigation of the heat island phenomenon has been evaluated in many studies [3], few evaluate the cooling energy savings in a building coated with such paint, because such savings in a typical office or residential building with high thermal insulation performance are generally insignificant [4]
The cooling energy savings in a building brought about by the use of heat island mitigation technologies such as green wall, green roof, and high-reflectance paints have been studied by several researchers [5,6]
Summary
High-reflectance paint is gaining popularity in Japan for mitigating the heat island phenomenon. The effect of such paint on the mitigation of the heat island phenomenon has been evaluated in many studies [3], few evaluate the cooling energy savings in a building coated with such paint, because such savings in a typical office or residential building with high thermal insulation performance are generally insignificant [4]. We analyzed the cooling energy savings produced in a real building based on energy measurements
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