Abstract
For any particular location glazing transmission varies with season and time of day. Thus, glazing transmission angular behaviour is more crucial than single glazing transmittance value for building energy simulation and design. In this work, the spectral behaviour of the dye-sensitized solar cell (DSSC) glazing with three different transparencies are studied. Transmittance of the devices are measured after 2 years to understand the effects of device stability on DSSC glazing applications. The solar factor for the devices is calculated for different light incident angles for a whole year at a particular location. The correlation between clearness index and DSSC transmittance is also studied. Finally, glare analysis is performed for all the devices on a sunny day, intermittent day and overcast day, and is also compared with double glazing. It is found that the 37% transparent DSSC glazing leads to a greater reduction in disturbing glare by 21% compared to double glazing on a clear sunny day. All the above results suggest that DSSC glazings could be productively used for fenestration integration in buildings.
Highlights
According to the world energy report, buildings consume 34% of world energy demand and are responsible for 6% of greenhouse gas emission[1]
The product of relative spectral distribution of illuminant D65 (Dλ) and the spectral luminous efficiency for photopic vision, V(λ) is the photopic luminous efficiency function of the human eye and has been added which ranges from 400 to 700 nm with its peak at 555 nm. This type of dye-sensitized solar cells (DSSC) glazing has low NIR transmission after 1600 nm and high visible transmission which is promising for glazing application
This study offers a yearly usable single glazing transmittance for DSSC glazing, which is advantageous for the building designers in northern latitude areas
Summary
According to the world energy report, buildings consume 34% of world energy demand and are responsible for 6% of greenhouse gas emission[1]. Smart or advanced type glazings have the potential to reduce building energy demand. Switchable and static transparent type of advanced glazings are currently available [9]. Static transparent PV glazings are promising for window applications due to their multifunctional property such as ability to control solar gain, daylight glare and generate clean electricity [10,11]. BIPV can replace other building envelopes such as walls and roof. The windows of a building are of prime importance as it is the only building envelope which maintains a relation between external environment and internal room [9]. Advanced BIPV windows are required to allow soothing daylight and to control the solar heat by using a single system
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