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RE: [EnergyPlus_Support] Photosensors


Please check Daylighting:Controls in the Input-Output Reference.� The inputs for this control include location in the room.



Ned Lyon, P.E. (MA, WV)
Staff Consultant

SIMPSON GUMPERTZ & HEGER
781.907.9000�main
781.907.9350 direct�
617.285.2162 mobile�
781.907.9009�fax
www.sgh.com



From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
Sent: Monday, February 01, 2016 3:56 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Photosensors





Does this depict behavior of a real physical sensor installed at some distance from the window?



On Monday, February 1, 2016 3:40 PM, "'Edward G. Lyon' <mailto:eglyon@xxxxxxx>eglyon@xxxxxxx [EnergyPlus_Support]" <<mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx>EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:





You have almost answered your own question.� If the photosensor is active, it must read a light level to know if it needs to turn on the lights.� It reads the calculated daylight at the sensor and calculates the electric lighting to add to reach a set lighting level�.



Ned Lyon, P.E. (MA, WV)
Staff Consultant

SIMPSON GUMPERTZ & HEGER
781.907.9000�main
781.907.9350 direct�
617.285.2162 mobile�
781.907.9009�fax
<http://www.sgh.com>www.sgh.com



From: <mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx>EnergyPlus_Support@xxxxxxxxxxxxxxx [<mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx>mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
Sent: Monday, February 01, 2016 3:26 PM
To: yahoogroups
Subject: [EnergyPlus_Support] Photosensors





When photosensors are activated in EnergyPlus, the output daylight illuminance in each zone is available. How does EnergyPlus separate daylight illuminance from electric illuminance? In a zone both electric lights and daylight are available a photosensor can tell the combined illuminance not separately daylight illuminance.






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 Posted by: "Edward G. Lyon" <EGLyon@xxxxxxx>

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