[Bldg-sim] Modelling heating

Joe Huang yjhuang at whiteboxtechnologies.com
Thu Mar 26 10:22:52 PDT 2015


The intention to always require heating in the base case is to prevent people from 
claiming energy savings simply by not providing any space conditioning!  However, if your 
building and climate makes heating unnecessary, that should show up in your base case 
simulations where the heating system never comes on. You should still use a reasonable 
heating schedule, e.g., 21 C (70F) during the day and 18.3C (65F) at night (or maybe even 
15.6C (60F) if building is unoccupied), just to prove that heating is indeed unnecessary. 
You might also track the indoor temperatures of your proposed building to convince LEED 
reviewers that indoor temperatures are always above the comfort zone.

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
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"

On 3/26/2015 12:16 AM, Rathna Shree wrote:
> Thank you Joe Huang. I am using Equest for the simulation. Can we set the heating as not 
> installed for LEED submissions?
>
>
>
> On Wednesday, 25 March 2015 11:59 PM, Joe Huang <yjhuang at whiteboxtechnologies.com> wrote:
>
>
> It all depends on which simulation program you're using, but all of them should be able 
> to accommodate you very easily.  You can either set the Heating Schedule to be never on, 
> and the Heating Setpoint Temperature to something very low, like 10 C (50 F).
>
> 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
> (o) (925)388-0265
> (c) (510)928-2683
> "building energy simulations at your fingertips"
> On 3/25/2015 2:58 AM, Rathna Shree wrote:
>> Dear All,
>>
>> In few of the climatic conditions we work on doesn't require heating at all. The 
>> temperature might go little less than 20deg C in winter but heating will definitely not 
>> be installed in the project. For these projects, how do we set the heating set point 
>> temperatures so that heating never switches on. we are facing issues especially while 
>> modelling VAV with PFP boxes in equest (PIU systems). The base case and proposed case 
>> heating and fan energy consumption are highly affecting the final savings results. I am 
>> looking to avoid this scenario and ensure heating never switches on, therefore zone 
>> fans also do not work.
>>
>> Please guide.
>>
>> Regards,
>> Rathnashree
>>
>>
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