Papers by Keyword: Reflective Coatings

Abstract: In order to discuss the effect of energy saving of heat-reflective insulation coating on exterior walls of building, the wall temperature change of two test rooms with heat insulation or not in Hangzhou has been monitored in summer, and the heat flux data of east, south and west walls were analyzed. The results indicate that the reflective coatings reduce the exterior surface temperature by up to 7 to 8°C. The reduction in heat gain of east, south and west walls is significant, which is the cooling effect. The total surface heat gain of exterior walls without reflective coatings is 2.44 times larger than those without them. In particular, the heat gain of walls with reflective coatings is nearly 5.27 times more than that of walls without reflective coatings. The reduction in electricity consumption of air-conditioning system in the building with reflective coatings is 2.5KWh/m² per month by calculation, which well proves the energy saving effect of reflective coatings.

Abstract: As a part of introducing new technologies and materials, reflective coatings are among many other materials ones, which have to be taken into account. This article presents the results of a comparative nature aiming to investigate the thermodynamic properties of selected reflective coatings on energy balance for periods of heating. In order to investigate their thermal performance at the external building surfaces dynamic outdoor testing was used. Two comparative coatings and reference standard facing coating were used for various samples. The measured data demonstrates that the representative coating consisting of hollow ceramic microspheres have the same thermodynamic properties as a standard facing coating, while the reflective coating have distinctive thermal performance effect depending on thermal insulation functions of measured samples.

Abstract: Reflectance and emittance are both important parameters for reflective coatings. Effects of them on building energy efficiency in hot summer and warm winter zone of china have been evaluated using the simulation software EnergyPlus. The results suggest that both the temperature of the surfaces of reflective coatings and the cooling load decrease as the reflectance and emittance increase, and for building energy efficiency the reflectance and emittance should be as high as possible in this zone.

Abstract: To discuss the effect of energy saving of heat-reflective insulation coating on exterior walls of building, the wall temperature change of two test rooms with heat insulation or not in Hangzhou has been monitored in summer, and the heat flux data of east, south and west walls were analyzed. The results indicate that the temperature of outside wall surface with the heat reflective insulation coating is reduced effectively, and the maximum temperature change was about 9, 10°C. There is a positive proportional between the mean daily air temperature and heat gain that the heat gain increases with the mean daily air temperature. By calculating, the higher the air temperature, the more the cooling effect of coating in summer. But the higher the mean daily temperature do not mean that the more heat gain in summer. The result shows the energy saving effect of the heat insulation coating on building wall was very obvious in summer in Hangzhou.

Abstract: This paper presents an experimental study on the energy saving effect of reflective coatings on exterior walls. Two identical test buildings were built in Zhejiang College of Construction, one of which is covered with reflective coatings and the other not. The wall temperature fluctuation of both buildings is monitored in summer, which includes the east, south and west walls. The results indicate that the maximum reduction of wall temperature is 9-10 °C in the building with reflective coatings, compared with wall temperature in the other without it. The reduction in heat gain of east, south and west walls is obvious, so is the cooling effect. The reduction in electricity consumption of air-conditioning system in the building with reflective coatings is 0.94 KWh/m² per month times by calculation, which well proves the energy saving effect of reflective coatings.