[Equest-users] How to get accurate building load component using eQUEST

[zhaoyongqing1987 via Equest-users]

Hi,Saurabh 


Sorry,maybe I don't make my question clear. 


the procedure of the building loads's calculation in eQUEST is shown as following:

 In Loads,  all the heat flows are calculated at the reference temperature (TLOADS) and counted as Cooling if the net space load that hour is positive or Heating if it's negative.  In Systems, these loads are corrected to the actual zone temperature and the load from OA and interzone heat transfer added, while solving for the zone temperature. If the zone temperature is outside the thermostat deadband, a deficit would be considered a heating load and an excess as a cooling  load on the HVAC system.(posted by Joe huang)


And monthly building load components(such as building load from roof,building load from wall and building load from window conduction etc.) are listed in LS-F report. But all these results in LS-F report are calculated based on the reference temperature(TLOADS),which is a fixed value assumed by user,not the actual zone temperature.My question is how to get the building components that are calculated based on actual zone temperature!


Yongqing

At 2016-11-18 15:15:42, "Saurabh Kumar Srivastava" <SASV at cowi.com> wrote:


Hi Yongqing,

 

I believe what you're looking for is:
If you have a room which is conditioned, you would like to know the building energy consumption without specifying the Room set-point temperature?

 

To calculate the Energy consumption a Delta T(temp) value would be required by eQuest, so it uses 1 temp from the weather file and other is the set point you have defined in the zone.
Until now I guess it not possible to model Free Cooling/Passive cooling for Rooms in a building, where in you let the room achieve various temperature when unconditioned and calculate fan power etc. etc.

 

But the crude way out of all this is you can input various Set point temperatures for a room in a given range say from 20°C to 30°C and take a median values obtained post simulation and evaluate the building load component.

The software does give hourly outputs for a fixed room set point temperate in Report SS-G. Scroll down in the .sim file  to see additional hourly data for a zone.



Feel free to ask, if any more doubt

 

Best Regards

 

Saurabh



 

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of zhaoyongqing1987 via Equest-users
Sent: Friday, November 18, 2016 11:22 AM
To: equest-users <equest-users at lists.onebuilding.org>
Subject: [Equest-users] How to get accurate building load component using eQUEST

 

Dear eQUEST user,

 

In eQUEST,LS-F is the building load component report,but the load in this report is calculated based on fixed indoor temperature.

And it is not  precise.My question is if there is anyway to get the accurate building load component,which is calculated based on 

hourly changed indoor temperature.

 

 

 

Yongqing

 

 





 
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