期刊
ENERGY AND BUILDINGS
卷 206, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.enbuild.2019.109570
关键词
Retrofit double glazing; Test bedding; Energy model
资金
- A*STAR [ICES-17188A04]
Double glazed facades are a well established feature for buildings located in cold ambient climate. In tropical climate there has been some penetration of Double Glazing Units (DGU) to reduce air-conditioning load. However, for existing buildings with older glass (usually having lower thermal insulation and higher solar transmission) a simple retrofit solution is to attach a low-e (hard coat) coated glass internally in the building without an explicit air tight seal. To analyse the proposed retrofit double glazing solution, experiments were conducted in a fully instrumented living lab to observe the performance viz: energy saving potential, Lux levels, and mean radiant temperature. Simulation using an energy model was conducted to estimate the annual energy savings. It is observed that retrofit hard coat low-e double glazing saves up to about 9% of daily energy consumption of Air conditioners (with annual average of 3% for Singapore weather conditions), when installed on all three sides (SE,SW,NW), for clear glass with window to wall ratio of 20% and air change rate of 1 ACH. For the same conditions the annual average energy savings can go up to 7.5% when installed on an existing grey tinted glass. (C) 2019 Elsevier B.V. All rights reserved.
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