[Bldg-sim] Modelling heating

[Rathna Shree]

But ASHRAE 90.1 appendix G requires identical heating to be modelled in both base and proposed case. So modelling a setpoint such that heating doesn't switches on is important.But how much ever lesser temperature i model, heating energy consumption is coming down but fan energy consumption is going up due to Zone fans (PFP boxes). 
 


     On Thursday, 26 March 2015 1:46 AM, k bk <planetkbk at gmail.com> wrote:
   

 
1) Make sure your zoning pattern will not require any reheat. Certain VAV zones served by the same system may require reheat if the central ahu supplies much cooler air than what is required by some zones.2) If there is no heating system in your building you should not include it in the model. Make sure the heating system is set to Not installed. Then the heating setpoint does not even matter.
 
 From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org]On Behalf Of Rathna Shree
Sent: Wednesday, March 25, 2015 4:59 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Modelling heating 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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