| Keywords |
Wooden Exterior wall; Thermal resistance; Thermal transmittance; ISO 9869-1 In-situ measurement |
| Abstract |
Rapid and accurate in-situ measurement of the thermal resistance of buildings is required for retrofitting for improved energy efficiency. Although there are several methods for estimating in-situ thermal resistance, the average method of ISO 9869-1 based on the heat flow meter method is most widely used. Many studies evaluate the thermal resistance of concrete walls. It is reported in the study that wooden walls can reduce the test duration compared to concrete walls. This study aimed to investigate and estimate the thermal resistance of wooden walls. The data obtained through the 9 days measurement showed that the average difference between indoor and outdoor air temperature was 27.1 °C and the difference between indoor and outdoor surface temperature was 28.6 °C. The estimated thermal resistance and thermal transmittance in most cases satisfy the convergence conditions of ISO 9869-1, and the minimum measurement duration is 3 days when evaluated with this measurement result. |