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[EnergyPlus_Support] Re: Baseline and proposed heating in EnergyPlus

All five floors have mechanical cooling in summer and therefore, according to your reply, are conditioned spaces.  I think we do have to add heating to the bottom 4 floors in the proposed model.

Thank you for your help!


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Jean marais" <jeannieboef@...> wrote:
>
> If the space is not heated or cooled then it does not classify as "conditioned space" and the requirements of standard 90.1 do not apply to that space (watch out for semi-conditioned spaces...check definitions carefully at the start of the 90.1 standard).
> 
> If your space is cooled, but not heated (I.e. it is "conditioned"), you must also model the mechanical heating system of the baseline model in the proposed design model (in your case the electric heating). You can however set the setpoints for when heating comes on, in such a way that it never does, e.g. Heating Setpoint = -50 deg C...as long as it is identical for both design and baseline case models.
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Xing" <xing.shi.2006@> wrote:
> >
> > This question is really about ASHRAE 90.1.  However, since we are using EnergyPlus to simulate the building, we hope that it can be answered here.
> > 
> > The simulated building has five stories.  The design (proposed model) only has heating (by a ground source heat pump) for the 5th floor, which is an office space.  The bottom 4 floors have no heating in the design.
> > 
> > According to Table G3.1 in Appendix G of ASHRAE 90.1-2007:
> > 
> > Where no heating system exists or no heating system has been specified, the heating system classification shall be assumed to be electric, and the system characteristics shall be identical to the system modeled in the baseline building design.
> > 
> > Our baseline model is ASHRAE system 8 (VAV + PFP boxes, heating provided by electric).  Does this mean that our proposed model has to add electric heating into the EnergyPlus model despite the fact that the acutal design does not have heating? 
> > 
> > Thanks!
> >
>




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