Re: [EnergyPlus_Support] DAYLIGHTING:DETAILED

[Rob Hitchcock <RJHitchcock@xxxxxxx>]

Arno,

Check your LIGHTS input.  Is there a Schedule associated with the LIGHTS 
that corresponds to the variation in Lights Total Heat Gain that you are 
seeing in your output?  Also, check the Fraction Replaceable field, 
which has to be set to 1.0 for dimming of lights to take place based on 
daylight illuminance levels.

Rob
============
Arno Dentel wrote:

> Hello users and dear EnergyPlus Support Team,
>
> I had modeled a simple room with a dimming lighting control system (for
> details please see below).
> The lights should be off, then the daylighting exceeds 500 lux.
> But (in the output file) I still have an heat gain for lighting, also the
> daylight illuminance is above 500 lux.
> The outputs for lighting control 2 (stepped) are similar.
> What could be the reason for this?
>
> Regards, Arno
>
>
> **********IDF************************
> DAYLIGHTING:DETAILED,
> Raum, !- Zone Name
> 1, !- Total Daylighting Reference Points
> 1.75000, !- X-coordinate of first reference point {m}
> 2.50000, !- Y-coordinate of first reference point {m}
> 0.85000, !- Z-coordinate of first reference point {m}
> , !- X-coordinate of second reference point {m}
> , !- Y-coordinate of second reference point {m}
> , !- Z-coordinate of second reference point {m}
> 1, !- Fraction of zone controlled by first
> reference point
> , !- Fraction of zone controlled by second
> reference point
> 500, !- Illuminance setpoint at first reference
> point {lux}
> , !- Illuminance setpoint at second reference
> point {lux}
> 3, !- Lighting control type
> 0, !- Azimuth angle of view direction clockwise
> from zone y-axis (for glare calculation) {deg}
> 22, !- Maximum allowable discomfort glare index
> 0.3, !- Minimum input power fraction for continuous
> dimming control
> 0.2, !- Minimum light output fraction for continuous
> dimming control
> 1, !- Number of steps (excluding off) for stepped
> control
> 1; !- Probability lighting will be reset when
> needed in manual stepped control
>
>
>
> **** OUTPUTS ******
> RAUM:Daylight Illum at Ref Point 1 [lux](TimeStep) BELEUCHTUNG:Lights
> Total Heat Gain [J](TimeStep)
> 0 0
> 0 0
> 0 0
> 0 0
> 0 0
> 0 0
> 0 0
> 0 104040
> 0 208080
> 259 312120
> 452 416160
> 660 416160
> 794 208080
> 1120 312120
> 1017 416160
> 447 416160
> 0 208080
> 0 104040
>
> [Non-text portions of this message have been removed]
>
>  





[Non-text portions of this message have been removed]



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