Design Guidelines for Enhancing Daylight Performance in Office Building by Using Electrochromic Glass

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Pattarakon Limchutrakul
Awiroot Srisutapan


The objectives of this research were to study the efficiency of daylight and energy consumption from electrochromic glass which can adjust to be either tint or transparency as well as the visible light transmission and solar heat gain coefficient. By studying the variable of window to wall ratio, building orientation and comparing with other types of glass. DIVA for Rhino was used for simulating and evaluating daylight performance. eQUEST 3.65 was used for analyzing energy consumption. The results showed that electrochromic glass was similar to other types of glass in transmitting daylight into the building when the status is transparent. Moreover, it can prevent glare when the glass turns into fully tinted stated. As a result, it will affect the reduction of heat transfer into the building as well. Furthermore, it can save electric energy in air conditioning and lighting systems including building energy consumption, especially in the east and the west by 25.80 and 28.86 percent respectively when compared with the use of green laminated glass. However, economic issue should be considered.


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