In Situ Evaluation of the U-Value of a Window Using the Infrared Method
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/7/1904 |
| _version_ | 1797539576784355328 |
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| author | Seyoung Park Seo Hoon Kim Hakgeun Jeong Sung Lok Do Jonghun Kim |
| author_facet | Seyoung Park Seo Hoon Kim Hakgeun Jeong Sung Lok Do Jonghun Kim |
| author_sort | Seyoung Park |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T12:46:51Z |
| format | Article |
| id | doaj.art-cb3768fd58764e1fbb3d3b6fe1bfdd13 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T12:46:51Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-cb3768fd58764e1fbb3d3b6fe1bfdd132023-11-21T13:25:16ZengMDPI AGEnergies1996-10732021-03-01147190410.3390/en14071904In Situ Evaluation of the U-Value of a Window Using the Infrared MethodSeyoung Park0Seo Hoon Kim1Hakgeun Jeong2Sung Lok Do3Jonghun Kim4Energy ICT Convergence Laboratory, Korea Institute of Energy Research, Daejeon 34101, KoreaEnergy ICT Convergence Laboratory, Korea Institute of Energy Research, Daejeon 34101, KoreaEnergy ICT Convergence Laboratory, Korea Institute of Energy Research, Daejeon 34101, KoreaDepartment of Building and Plant Engineering, Hanbat National University, Daejeon 34158, KoreaEnergy ICT Convergence Laboratory, Korea Institute of Energy Research, Daejeon 34101, KoreaThe 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.https://www.mdpi.com/1996-1073/14/7/1904energy remodeling of existing houseswindowU-valueISO 9869-1: HFM (heat flow meter)ISO 9869-2: IR (infrared method)in situ |
| spellingShingle | Seyoung Park Seo Hoon Kim Hakgeun Jeong Sung Lok Do Jonghun Kim In Situ Evaluation of the U-Value of a Window Using the Infrared Method Energies energy remodeling of existing houses window U-value ISO 9869-1: HFM (heat flow meter) ISO 9869-2: IR (infrared method) in situ |
| title | In Situ Evaluation of the U-Value of a Window Using the Infrared Method |
| title_full | In Situ Evaluation of the U-Value of a Window Using the Infrared Method |
| title_fullStr | In Situ Evaluation of the U-Value of a Window Using the Infrared Method |
| title_full_unstemmed | In Situ Evaluation of the U-Value of a Window Using the Infrared Method |
| title_short | In Situ Evaluation of the U-Value of a Window Using the Infrared Method |
| title_sort | in situ evaluation of the u value of a window using the infrared method |
| topic | energy remodeling of existing houses window U-value ISO 9869-1: HFM (heat flow meter) ISO 9869-2: IR (infrared method) in situ |
| url | https://www.mdpi.com/1996-1073/14/7/1904 |
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