[EnergyPlus_Support] Re: PSZ-AC w/district heating? AirLoopHVAC:Unitary:Furnace:HeatCool only has gas or

["jeannieboef" <jeannieboef@xxxxxxxxx>]

Mr. Dirkes,

I'm also having trouble pinning down the required efficiencies.

I'm guessing the following at the moment:
System Type: Packaged rooftop air conditioner
Fan Control: Constant Volume
Cooling Type: Direct Expansion (DX)
Cooling Capacity: (zone dependant, ranging from 5.2 kW to 0.1 kW)

Min Efficiency Requirements as per Table 6.8.1A Air Conditioners,
Equipment Type: Air Conditioners, air cooled (as DX coils are air cooled),
Size Category: <19 kW (rated cooling capacity?),
Heating Section Type "All"
Subcategory or Rating Condition: Single Package
Minimum Efficiency (cooling?): 3.18 SCOP (as of 1/23/2006)

Heating Type: Normally Fossil fuel furnace, but as per Treatment of District or Campus Thermal Energy in LEED V2 and LEED 2009 ? Design & Construction, August 13 2010 ? Purchased District Heating

Heating Capacity: (zone dependant, ranging from 4.4 kW to 0.1 kW)

What will the heating coil efficiencies be? I see options for implementing cooling coil efficiencies (using the modifier curves as per DOE-2.1E) and part load functions, but not for a hot water coil. Is there any requirement for how much heat must be transfered from the coil to the air?

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Vinay Devanathan <vinay.devanathan@...> wrote:
>
> Mr. Dirkes,
> 
> Do we have to use only coil:hot water or can we also use coil:gas?
> 
> Thank you.
> 
> On Aug 30, 2010, at 6:59 AM, "James V Dirkes II, PE" <jvd2pe@...>  
> wrote:
> 
> > Dear Jeannie,
> >
> >
> >
> > Just construct an Air Loop which has a fan, (hot water) heating coil  
> > and DX cooling.
> >
> >
> >
> > There is nothing magical about the Furnace:HeatCool object; it just  
> > has a cycling (on:off) fan, a heating coil and a cooling coil.
> >
> >
> >
> > The Building Performance Team
> > James V. Dirkes II, P.E., LEED AP
> > 1631 Acacia Drive NW
> > Grand Rapids, MI 49504
> > 616 450 8653
> >
> >
> >
> > From: EnergyPlus_Support@xxxxxxxxxxxxxxx  
> > [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of jeannieboef
> > Sent: Monday, August 30, 2010 4:40 AM
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > Subject: [EnergyPlus_Support] Re: PSZ-AC w/district heating?  
> > AirLoopHVAC:Unitary:Furnace:HeatCool only has gas or
> >
> >
> >
> >
> >
> >
> > Is everyone on holiday?
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "jeannieboef"  
> > <jeannieboef@> wrote:
> > >
> > > anybody have an idea as to how to do this?
> > >
> >
> >
> >
>




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