How can we assign lights in a zone that have zero electrical load but have lighting load?

asked 2022-04-20 00:36:59 -0600

asli.kaya
33 ●3

updated 2022-04-20 00:39:56 -0600

Hello! I am trying to model a solar illuminated vertical farm in Energyplus. For this, I have some lights that uses the sunlight carried with optical fibers, therefore they have zero electrical load. However, I want to take their thermal load into account in my analysis, therefore I want to assign a lighting density but make it seem like they do not consume electricity.

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answered 2022-04-20 03:31:38 -0600

shorowit

11891 ●201 ●9 https://www.nrel.gov/b...

updated 2022-04-20 03:32:42 -0600

The typical way to add/remove heat from a zone without also adding electricity or fuel use is to use an OtherEquipment object and set its Fuel Type field to "None" (or leave it blank). As the documentation states:

If the None fuel type is selected (the default if left blank), no end uses will be associated with the object, only the zone gains.

You can read more about how this object works here, for example.

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Thank you so much, I wasn't sure if other equipment could contribute to the heat gain, therefore energy consumption for thermal loads. It helped a lot, thanks.

asli.kaya ( 2022-04-20 04:16:11 -0600 )edit

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answered 2022-04-20 07:10:53 -0600

kwalkerman
1482 ●8 ●9

There is also an EnergyPlus Object DaylightingDevice:Tubular which you may be able to use for this purpose. This object will respond to the weather conditions outside and may give a more accurate representation of the light and loads inside the space.