Role of airtightness in energy loss from windows: Experimental results from in-situ tests
| Autor: | Erdem Cuce |
|---|---|
| Přispěvatelé: | Bayburt University |
| Rok vydání: | 2017 |
| Předmět: |
Windows
Engineering Overall heat transfer coefficient 020209 energy 0211 other engineering and technologies In-situ test 02 engineering and technology Heat transfer coefficient Energy conservation Greenhouse effect Air leakage Energy saving Heat transfer 021105 building & construction 0202 electrical engineering electronic engineering information engineering Forensic engineering Co-heating Electrical and Electronic Engineering Sash window Civil and Structural Engineering Double glazed windows business.industry Energy dissipation Heat losses Mechanical Engineering Heat loss Airtightness Window (computing) U-value Building and Construction Structural engineering Test method Glazing Heat flux U values business Double-glazed window Experimental investigations |
| Zdroj: | Energy and Buildings. 139:449-455 |
| ISSN: | 0378-7788 |
| DOI: | 10.1016/j.enbuild.2017.01.027 |
| Popis: | The rate of air leakage related energy loss from glazed areas is unequivocal especially in older and poorly installed windows. Therefore, in this research, a comprehensive experimental investigation is done to analyse the importance of air leakage on overall heat transfer coefficient (U-value) of conventional air filled double glazed windows. The tests are conducted in a typical UK dwelling of Nottingham fitted with traditional air filled double glazed windows. One sash of the test window is sealed internally with a special transparent cover to provide excellent airtightness whereas the second window sash is left as it is to represent the ordinary case. The experiments are conducted in April 2016, and dynamic co-heating test methodology is applied to evaluate the rate of enhancement in the U-value of airtight window sash. The results indicate that the airtight window sash has a notably lower U-value compared to the ordinary window sash due to the impact of airtightness and reverse heat flux during noon time owing to the greenhouse effect between transparent cover and internal glazing. The overall U-value of ordinary window sash is found to be 2.67 W/m(2)K, whereas it is 1.79 W/m(2)K for airtight window sash. It is observed that about 33% of reduction in heat losses can be achieved via airtight windows. (C) 2017 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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