[Equest-users] Question on Energy consumption results

[Wolfe, Josh]

I’m confused by your original question, before you received an error sounds like the program was working properly.

With daylighting controls “off” area lighting consumption should not change, regardless of window properties the lighting will run per your schedules.


From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Akshat Kabra via Equest-users
Sent: Monday, September 24, 2018 10:38 AM
To: Nicholas.Caton at schneider-electric.com
Cc: equest-users at onebuilding.org
Subject: Re: [Equest-users] Question on Energy consumption results

Hi,


I checked it for already defined glass library by comparing single and double glass unit with varying specs, the area light is not changing.

I have customised the windows and curtain wall required for the project and have customised glass specification depending on U value, SC, VLT.
Base case
U value- 1 Btu/h-ft2-F
SC-0.42
VLT-0.26

I need to check with DGU glass and overhangs what would be energy consumption.

When I switch on the  daylight control for all shell components, the simulation run says error.

I am attaching the file .
Please check by changing the SC and VLT, is the area light consumption changing?

Thanks




On Mon, Sep 24, 2018 at 7:44 PM Nicholas Caton <Nicholas.Caton at schneider-electric.com<mailto:Nicholas.Caton at schneider-electric.com>> wrote:
Hello!

If I had to make a guess, a relatively common issue I’ve uncovered would start with checking whether the glass being revised, before editing, is using the glass library specification method (i.e. your glass is defined via code like 2004).  In that scenario, you are permitted to add/define inputs used with the simplified method of defining glass like VIS-TRANS and GLASS-CONDUCT through parametric inputs, but they won’t “hook” and accomplish anything.  You’d need to swap your glass inputs over to simplified first, or else look up another library entry appropriate for your VLT switch and edit that assignment instead.

If this doesn’t cover it, there are a myriad of daylighting-related inputs which may throw off the expected behavior.  It would probably be most time-efficient for you to share a copy of the model files (pd2/inp) with the list, and to indicate the specific window(s) you are expecting to observe results by editing.  It would also in that context be helpful to know whether you used the wizards to help you set up the space daylighting inputs before toggling to “No” daylighting.

~Nick


[cid:image001.png at 01D453E6.35EB3EE0]
Nick Caton, P.E., BEMP
  Senior Energy Engineer
  Regional Energy Engineering Manager
  Energy and Sustainability Services
  Schneider Electric

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From: Equest-users <equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org>> On Behalf Of The Energy Simulation Academy via Equest-users
Sent: Sunday, September 23, 2018 10:20 AM
To: Akshat Kabra <akshatspin at gmail.com<mailto:akshatspin at gmail.com>>
Cc: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] Question on Energy consumption results

What's the VLT values thay you're using?
On Sun, Sep 23, 2018, 08:16 Akshat Kabra via Equest-users <equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>> wrote:
Hi,

I am modelling on Design Development wizard, I am changing VLT of glass , but there is no change in area lights consumption.
Why is it so ?

I have switched off daylight control.
When I switch on , the results show changes.

Regards

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