In Situ Evaluation of the U-Value of a Window Using the Infrared Method

Energies

SungLok Do¹  Jonghun Kim²  Hakgeun Jeong²  SeoHoon Kim²  Seyoung Park² 

[1] Department of Building and Plant Engineering, Hanbat National University, Daejeon 34158, Korea;Energy ICT Convergence Laboratory, Korea Institute of Energy Research, Daejeon 34101, Korea;

关键词: energy remodeling of existing houses;    window;    U-value;    ISO 9869-1: HFM (heat flow meter);    ISO 9869-2: IR (infrared method);    in situ;   

DOI  :  10.3390/en14071904

来源: DOAJ

【 摘 要 】

The amount of heat lost through the envelope of a building is one of the most important variables that affects the energy performance evaluation of a house. In addition, it is especially important to estimate and accurately diagnose the amount of heat produced by windows. In Korea, windows’ U-values reflect a building’s initial design values and thermal characteristics that determine the thermal performance of an existing building, and is a factor that can overestimate the energy performance of a building. Therefore, there is a need for a field measurement method that can accurately measure the total U-value of windows in an existing house. This study provides a method of quantitatively measuring the total U-value of windows using the infrared (IR) method in ISO 9869-2. As a result of measuring the U-value using the infrared (IR) method, the Korean Standard (KS F 2278) for window performance test result values and the root mean square error (cvRMSE) for the U-value measurements using the IR method showed a high accuracy of about 3.29%. In addition, we confirmed that the IR method is an effective (cvRMSE about 7% improvement) method that can measure the comparison result faster than the heat flow meter (HFM) method, which is a conventional thermal performance measurement method.

【 授权许可】

Unknown