[Equest-users] Hourly Change in Indooor Air Temp for an Unconditioned Space

[Sharad Kumar]

Hi Ronny,

I guess the first variable is as per without heating/cooling having some
profile or schedule as per eQUEST.
so the variable two is also having profile which can be ON for 24 hours
which can be without heating or cooling
and the third variable can also be having 24 hour profile or schedule.

So there can be discrepancy in the first variable as the profile or
schedule is OFF for other time. The first variable is as per the set-points
for the hours when profile is ON.

Variable two and three can have profile to be ON for all the hours.
These comments are as per IES-VE as i already had these kind of experience
sometime back.

The Building Template Manager can have some profile for the occupied and
unoccupied hours as i have never seen these kind of variables in eQUEST.
Pardon me if this is as per eQUEST.

So the second and the third variables are having the logic that the current
hour temperature are as per the exact hours point value but the average
temperature during this hour is the average of all seconds in the hour
which is averaged out.

So as per me the thing that you are looking for is the first variable whose
profile or schedule should be having OFF for all the hours otherwise it is
meeting the set-points as per profile. Then you will be able to do the
analysis for unconditioned building for solar gains.
Hence you need to switch off the profile or Schedule.

Pardon me if you have not done it in IES-VE.
I think this will be helpful.


Thanks,
Sharad Kumar.
Green Horizon Consulting LLP
Gurgaon
India.
Linked-in
<https://www.linkedin.com/profile/view?id=151208255&trk=nav_responsive_tab_profile>

On Mon, Sep 7, 2015 at 1:32 AM, <equest-users-request at lists.onebuilding.org>
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> Cc:
> Date: Sat, 5 Sep 2015 22:40:49 +0000 (UTC)
> Subject: [Equest-users] Hourly Change in Indooor Air Temp for an
> Unconditioned Space
> Hello
>
> I want to track the hourly change in indoor air temperature inside an
> unconditioned space based on solar gain through different glazing types. I
> have identified the potential variables for the specific zone  ( No heating
> or cooling enabled)  that I can review using hourly reports.
>
> Variable 1>Trial zone temp (if no heat/ooil activity) (deg F)
> V 2>Current hour zone temp (deg F)
> V 3>The average temp during this hour (deg F)
>
> After looking at the results I find that variables 1 and 2 sometimes match
> exactly for a given hour and at other times variable 1 is 4-5 degrees lower
> than 2. Variables 2 and 3 give very similar hourly data but are almost
> never identical. My understanding is that DOE2 considers the entire air
> mass inside a zone to be the same temperature for a given hour so I am not
> sure what is the difference between variables 2 & 3.
>
> I am hoping some of the more experience DOE2 users with knowledge of how
> the indoor space temp is calculated can explain the difference between
> these three variables and suggest which is the most approrptrie one to
> select for my exercise.
>
> thank you
>
> Ronny
>
>
>
>
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