[EnergyPlus_Support] RE: Re: How to model 2-Piped FCU that has Electric Resistance Heater using HVACTemplate

I tend to maintain the piping as adiabatic and if there is large uninsulated piping I put it as a heating load in the space.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, <energyplus_support@xxxxxxxxxxxxxxx> wrote:

Thank you for your responses,
But doesn't modeling the boiler to be electric imply that it is water that transfers the energy, and there might be loses in heat energy from the hot water loop? also, there is the water high specific heat
I mean it feels different from using electric heaters directly in the FCU where air passes over the hot wires directly, i.e the heating source is inside the FCU with no need to water pipework which can lose energy while transporting water, or can delay heating the space because water has to be heated relatively slowly first.

Thank you very much,
Hisham

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jim Dirkes <jim@...> wrote:
>
> I like that idea better!
>
> The Building Performance Team
> James V. Dirkes II, P.E., BEMP , LEED AP
> 1631 Acacia Drive NW
> Grand Rapids, MI 49504
> 616 450 8653
> ________________________________________
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Karen Walkerman [kwalkerman@...]
> Sent: Sunday, September 15, 2013 14:02
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: Re: [EnergyPlus_Support] How to model 2-Piped FCU that has Electric Resistance Heater using HVACTemplate
>
> Or try using the FCU template object and make the boiler an electric boiler. Then zero out the pump energy.
>
> This will give you your heating energy as electric and you can use the FCU fan. Only challenge is if you have any other hot water components attached to the boiler.
>
> --
> Karen
>
> On Sep 15, 2013 1:48 PM, "Jim Dirkes" <jim@...<mailto:jim@...>> wrote:
>
>
> Consider modeling each zone as an air loop with chilled water coil and electric heating coil. Define fan Efficiency and pressure rise to be the equivalent of the fan coil
>
> Jim Dirkes II
> Building Performance Team
>
> On Sep 15, 2013, at 8:54 AM, "hisham.rashrash" <hisham.rashrash@...<mailto:hisham.rashrash@...>> wrote:
>
> > Hi,
> > I am using EnergyPlus v7.2, and I need to model FCUs as HVACTemplate:Zone:FanCoil objects, but I need them to have electric heating rather than boiler hot water coils. But the
>