[Equest-users] Different Hourly Values for Winter and Summer

Mon Apr 20 08:53:30 PDT 2020

If you have enabled the doe2.3 engine, the input you are looking for is here:
[cid:image004.png at 01D61703.58948F00]
If you are using the doe2.2 engine, this dropdown is in the same screen, but a different position.

For further reading, see the following in the doe2 reference manual entry (Help --> DOE-2 Help…) :  Volume 2: Dictionary > Envelope Components > SITE-PARAMETERS > Daylight Savings Invervals

I’ll also observe:  If as-stated your concern is establishing the peak load between 2 and 6pm, this whole matter does not impact your query as your simulation appears to always resolving to 6.69619 kWh load during that timeframe.  The only seasonal variation identified is during the midnight and 5AM hours.  If you are uncertain/distrustful of the “rainbow reports” provided by eQuest (I always encourage the spirit of “trust but verify” with energy simulation), I might suggest using Excel to create a quick pivot chart displaying maximum total meter draw, grouped by month/hour, to assert that with absolute certainty.

Further, I might challenge the assumption that there is even a problem here (if there is one).  Observing the hourly fractional values of this schedule are probably intended to reflect an aggregate of lighting control devices (automated and/or occupant-controlled), you might really need to start with answering this prompt: “To what extent were these lights affected when clocks shifted forward and backward due to daylight savings time in 1996?”  If the majority of lights are turned on/off by people who are adjusting their workday to reflect daylight savings, or with astronomical timeclocks (which self-adjust to reflect the varying sunrise/sunset times through the year, then what’s being simulated may well be a pretty accurate result.  In that case, you might not want to change anything.

~Nick

[cid:image002.jpg at 01D61703.79B71270]
Nick Caton, P.E., BEMP
  Senior Energy Engineer
  Energy and Sustainability Services
  Energy Performance Contracting
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785 . 410 . 3317
nicholas.caton at se.com<mailto:nicholas.caton at se.com>
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Lenexa, KS 66219

[cid:image003.png at 01D61700.6061F680]

From: Equest-users <equest-users-bounces at lists.onebuilding.org> On Behalf Of Daric Adair via Equest-users
Sent: Monday, April 20, 2020 8:25 AM
To: Sharad Kumar <sharadcapricious at gmail.com>; equest-users <equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] Different Hourly Values for Winter and Summer

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Siddharth;

The issue isn’t the hourly schedules or some misalignment. It’s probably USA daylight saving time.  Until 2005 in the USA daylight saving time extended from first Sunday in April (4/7/1996)  to last Sunday in October (10/25/1996).  (It has been extended in US by ~2 weeks on both sides).  Note: I believe eQuest uses the older dates as it predates the change, so there’s a fun legacy fact.

There is an option within eQuest to disable accounting for daylight saving time. This should force hours to align with expectations.

Thanks,
DARIC R ADAIR PE, CEM, BEMP
Mechanical Engineer, Energy Analyst

Henderson Engineers
daric.adair at hendersonengineers.com<mailto:daric.adair at hendersonengineers.com>

Licensed in KS

From: Sharad Kumar <sharadcapricious at gmail.com<mailto:sharadcapricious at gmail.com>>
Sent: Sunday, April 19, 2020 6:39 AM
To: equest-users <equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>>
Subject: Re: [Equest-users] Different Hourly Values for Winter and Summer

Hi Siddharth,

I shall try to help you out in the following certain way.

The problem that you are looking at is the non-able to read the hourly report as per the modeled schedule.

The schedule provided has the input as 18 working hours input in the schedule mighty to be the likely input for the working hours which seemingly to be the output as 6.69619 Watts.
The other rather inputs are just after and before these hours whose output in the hourly report is 3.3481 Watts.
The other rather given inputs can be for four consecutive hours whose response is coming as 1.11603 Watts. So in overall the total number of hours are coming as the sum-up which is 24 hours in consecutive pattern.
Now as the schedule is for total year in weekly pattern so the hours are repeating in such a sense that the hourly report can be read in minding the 24 hour daily basis hourly report.

So might be reading the hourly report in this way can help you someway.

Hope this might help.

Thanks,
Sharad.Kumar
Freelancer
India.

.......................................................................................................................................................

From: siddharth patil <patilsiddharth5 at gmail.com<mailto:patilsiddharth5 at gmail.com>>
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>

Date: Sat, 18 Apr 2020 13:25:32 -0700
Subject: [Equest-users] Different Hourly Values for Winter and Summer
Hello all,
While looking at eQuest Hourly Results for lighting end-use I came across a situation where 24-hr lighting end-use had different values for WD during winter and summer. Please see the results below.

LTG WD [7.44kW]
2-Jan
7-Apr
28-Oct
0.45
3.3481
1.11603
3.3481
0.15
1.11603
1.11603
1.11603
0.15
1.11603
1.11603
1.11603
0.15
1.11603
1.11603
1.11603
0.15
1.11603
3.3481
1.11603
0.45
3.3481
6.69619
3.3481
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
6.69619
6.69619
0.9
6.69619
3.3481
6.69619

It looks like the values shifted roughly around the week of 4/7,  one hour upwards so overall usage remained the same every weekday but again changed to actual one on 10/28. Connected lighting load is 7.44kW and the schedule is as per column one,
There is only one schedule throughout the year[12/31]. I'm using the simulation year of 1996. I'm trying to estimate the average peak usage between 2 pm-6 pm. Since the values change between winter week and summer week, I'm unable to estimate exact peak usage. Any help would be appreciated!

Thank you
Siddharth

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