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Is there any way to feed illuminance calculaed by Radiance to EnergyPlus

asked 2021-11-07 20:22:14 -0600

yongqingzhao gravatar image

updated 2021-11-08 07:58:03 -0600

Hi, everyone

I am investigating the energy saving of prismatic daylight redirecting fenestration (PDRF), whose fundamental is that the light is introduced into the deeper inside by PDRF, thus the daylight would be fully utilized, resulting in less artificial lighting energy and lighting heat gain. However, the daylight model in Eneryplus cannot model the redirecting effect of PDRF, so I would like to use EnergyPlus to couple with radiance. The illuminance calculated by Radiance where the sensor is placed is transferred to EnergyPlus in each timestep. I know BCVTB can implement a couple of Energyplus and Radiance, but I don't know which variable in Energyplus should receive the calculated illuminance of Radiance.

Any Suggestion?

Thank you!

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answered 2021-11-09 10:36:05 -0600

The OpenStudio Radiance measure works in a similar way to what you described, running Radiance prior to EnergyPlus. However in this measure instead of passing illuminance values to EnergyPlus the measure takes the Radiance illuminance values along with the EnergyPlus lighting schedules and creates and applies a modified lighting schedules that reflect the Radiance daylighting results on the EnergyPlus usage profile. I don't know if the measure currently supports PDRF, but if not it could be updated to support that.

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Asked: 2021-11-07 20:22:14 -0600

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Last updated: Nov 09