2134/9116957.v1
Doris Abigail Chi Pool
Doris Abigail Chi
Pool
Eleonora Brembilla
Eleonora
Brembilla
Using radiance to estimate transmitted solar radiation energy for thin perforated screens
Loughborough University
2019
Radiance
Solar radiation energy
Perforated screen
Shading coefficient
2019-08-06 09:52:11
Conference contribution
https://repository.lboro.ac.uk/articles/conference_contribution/Using_radiance_to_estimate_transmitted_solar_radiation_energy_for_thin_perforated_screens/9116957
Design of shading systems is essential, since they plays an important role in the modulation of
daylight and solar gains. Yet, current simulation tools are not capable of providing accurate
results for both daylighting and energy performance simultaneously, especially when complex
geometries are present. This work investigates whether shading coefficients (SC) can be
applied to evaluate the performance of thin screens, and it compares the results to those
obtained through other methods, such as the use of a fixed transmittance value over the whole
year. Results showed that hourly SC can take into account the variability of total transmitted
solar radiation throughout the year. As a result, the cooling energy reached reductions of up to
22 % in comparison to the use of a fixed transmittance value. SC also enabled the assessment
of inter-reflections within the PS-glazing system, especially those resulted from varying the
distance between the PS and glazing.