Thermal Behavior of a Low-Cost House Coated with Transparent Infrared Reflective Paint
Low-cost housing was introduced in South Africa by the newly elected government in 1994 as part of the reconstruction and development programme. Uncontrolled heat transfer in the thermal envelope of these houses result in indoor thermal discomfort. To maintain indoor thermal comfort, occupants spend excessive amount of energy on space heating. Due to total internal reflection, transparent coats can be used to reduce heat propagation through the thermal envelope. This study presents the thermal behavior of a low-cost house with the walls inner surface coated with transparent infrared reflective paint. The thermo-optical properties of the paint were analyzed using Scanning Electron Microscopy/ Energy Dispersive X-ray spectroscopy (SEM/EDX), Fourier Transform Infra- Red (FTIR) and thermal photographic technique. Meteorological indoor and ambient parameters such as; air temperature, relative humidity, solar radiation, wind speed and direction of a low-cost house were monitored. The monitoring period covers both winter and summer seasons before and after coating. The SEM image reveals that the coat is transparent to light. The presence of Al as Al2O3 and other elements were revealed by the EDX spectrum. In the winter season, the indoor heating degree hours were 6674.72 °C h, equivalent to 4.86 kWh/m2. It was found to drop by 56% with a heating demand of 2.15 kWh/m2 and 2954.33 heating degree hours, after coating. The paint was able to reduce heat lost through the building walls. It could serve as an immediate and long term remedy to low-cost housing and the emerging energy crisis in South Africa.
community empowerment energy saving low-cost house
Ochuko Kelvin OVEREN Edson Leroy MEYER Golden MAKAKA
Fort Hare Institute of Technology, University of Fort Hare, South Africa Physics Department, University of Fort Hare, South Africa
国际会议
2017世界可持续建筑环境大会(the World Sustainable Built Environment Conference)
香港
英文
758-764
2017-06-05（万方平台首次上网日期，不代表论文的发表时间）