Solar illuminance hourly data

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Dear folks,

Is there any way to get solar illuminance (Lux) hourly data on a
glass. Software
like energy plus, eQuest or any other.

Thanks in advance.

Anil Jangid's picture
Joined: 2019-05-16
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Hi Anil,

I think you can do that by specifying the following in the hourly reports.
See the attached image:

[image: image.png]

Hope this helps,

On Thu, Nov 21, 2019 at 8:29 AM Anil Jangid via Equest-users <

*Calvin Chu, MFBA, EIT*
Energy Modeler
646-780-5536 | cchu at

11 Hanover Square, 21st Floor
New York, NY 10005

cchu's picture
Joined: 2018-07-12
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These are about the daylight sensor in the zone it seems.

Energyplus has a few solar radiation rate variables specific to windows, not sure about eQuest.

Sent from a mobile device, please excuse the brevity.

Julien Marrec, EBCP, BPI MFBA

Direct:?+33 6 95 14 42 13
LinkedIn (en) | (fr)?

jmarrec's picture
Joined: 2013-01-09
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Yeah, Julien nailed it!

I?m not sure whether the custom hourly report variable options provide a direct means to see the calculated direct/reflected illuminance, before or after shading elements. Might be in there somewhere but I didn?t see on first pass through the options.

That said, perhaps your needs would be satisfied with the LV-L report, which provides a pretty detailed breakdown regarding exterior illuminance measurements? I think you need to enable daylighting for the space hosting the surface/window of interest.
[cid:image002.png at 01D5A36F.60184BC0]

Here are some options I did find within custom report hourly outputs for windows, which are more focused on solar radiation (total spectrum of solar energy, not just visible light). There might be something specific to illuminance (fc/lux) elsewhere however such as for surfaces?
[cid:image003.png at 01D5A36F.60184BC0]

[cid:image005.png at 01D515A3.47EDD880]
Nick Caton, P.E., BEMP
Senior Energy Engineer
Energy and Sustainability Services
Energy Performance Contracting

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785 . 410 . 3317
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Lenexa, KS 66219
[cid:image006.png at 01D515A3.47EDD880]

Nicholas Caton2's picture
Joined: 2019-03-25
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