[Equest-users] Modelling Non AC building in eQUEST

Fri Feb 17 22:59:03 PST 2017

Sorry,
last message got sent out inadvertently while I was editing it.  The full message is 
contained below.

-------- Forwarded Message --------
Subject: 	Re: [Equest-users] Modelling Non AC building in eQUEST
Date: 	Fri, 17 Feb 2017 14:59:15 -0800
From: 	Joe Huang via Equest-users <equest-users at lists.onebuilding.org>
Reply-To: 	Joe Huang <yjhuang at whiteboxtechnologies.com>
To: 	equest-users at lists.onebuilding.org

I have doubts about how you're doing this.  I used to model non-conditioned buildings in 
Asia by using the Residential (RESYS) system and setting the Heating and Cooling Setpoint 
temperatures way below or above the actual room temperature so that they never come on, 
e.g.,  Heating at 99 and Cooand , which uses a different VENT-TEMP-SCHEDULE for the 
temperature above which windows are expected to open, e.g., 75 F, PROVIDED that the 
outdoor air temperature or enthalpy is lower.  To be doubly safe, you can set the Heating 
and Cooling capacity to very small numbers, like 0.1, etc., although that's immaterial 
because they would never come on.

I don't see how you can derive unmet hours for an unconditioned space, but you can derive 
the hours above comfort, e.g., 78 F, and tabulate that.  I used to call them Heating or 
Cooling Discomfort Hours :-)

Joe

Joe Huang 	
White Box Technologies, Inc.
346 Rheem Blvd., Suite 205A
Moraga CA 94556
yjhuang at whiteboxtechnologies.com
http://weather.whiteboxtechnologies.com  for simulation-ready weather data
http://www.whiteboxtechnologies.com
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"

On 2/14/2017 5:34 AM, Kirti Pabrekar - Patil via Equest-users wrote:
> Dear eQuesters,
>
> I have the following doubt.
>
> 1. This is a hostel building. all the rooms are non ac except the wardens cabin and the 
> counselling room. These two rooms have split units.
>
> 2. I have to model this for thermal comfort compliance - so i need to show that there 
> are less unmet hours in the building.
>
> How do I go about this?
>
> What i thought was as under,
>
> 1. I made the entire model and assigned the ac and non ac spaces as per design.
> 2. I plan to put a system in the non ac rooms, such that the CFM generated due to 
> ceiling fans can be put as Fan Flow Parametres. A 12 hour fan schedule (as per the 
> evening + night time occupancy hours) can be assigned to this. Other than this there 
> will be no input parameter assigned to this system - no COP, no efficiency. Other than 
> this these rooms have to behave as non ac spaces.
>
> Now my questions,
> 1. Do you think this is logical way to do?
> 2. Is there any other way to go about this?
> 3. If what i have described in point 2 is okay, while i assigning systems what should it 
> be? Like Sum or FNSYS or VAVS etc? Please let me know the specifics
>
> Please give me an insight into this ya.
>
> Regards
> Kirti
>
> *Kirti Pabrekar - Patil*
> M. Arch, LEED GA,
> IGBC AP, GRIHA Trainer & Evaluator,
>
> /
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> /
> /Green is a commitment...not a competition/
>
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