Abstract
Electrochromic devices (EC), or Smart Windows, are amongst the most promising technologies to increase users’ wellbeing in buildings. A comparative test of EC windows performance was realised in the ZEB Test Cell Laboratory in Trondheim, Norway. Two identical rooms were used for the comparative tests. One of the rooms was equipped with EC devices. The other room was equipped with a traditional insulated glazing unit (IGU) with external solar shading device. Three automatic control strategies were tested in this experiment. The EC device demonstrated a good impact on the thermal and visual comfort when compared to a traditional IGU without moveable shading and a traditional IGU with an external screen.
Highlights
An Electrochromic (EC) glass differs from conventional ones because its optical characteristics are not fixed in time but change when a small DC voltage is applied [1]
A comparative test of Electrochromic devices (EC) windows performance was realised in the ZEB Test Cell Laboratory in Trondheim, Norway
The other room was equipped with a traditional insulated glazing unit (IGU) with external solar shading device
Summary
An Electrochromic (EC) glass differs from conventional ones because its optical characteristics are not fixed in time but change when a small DC voltage is applied (usually between 1 and 5V) [1]. EC devices can work as a solar shading while allowing the view of the surroundings [2,3]. Some specific aspects related to the use of EC devices are still not fully investigated. Among those the impact of the switching time which is longer than any other shading device, the user perception of the device itself and the user preference with regards to the manual or automatic switching [5]. This work presents the first step towards a more complete testing campaign
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