Fernando,
I understand better now.
Consider:
I do not see any object which uses the water such as WaterUse:Equipment.
If there is no water use, the load will be zero.
In this case, HPHW Use Inlet Node must be connected to a water
use.
(I cannot spend more time on this for several hours. I hope
this helps!)
WaterHeater:Mixed
Coil:
WaterHeater:HeatPump
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 Fernando Silva
Sent: Tuesday, March 30, 2010 4:52 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: Problems with Heat Pump AirToWater
Mr. James V Dirkes II
I´m glad and aprecciate your atention gave in this simulation!
I understand what you mean and I agree with you when I talk about
HeatPump:WaterToAir, but in this case it´s AirToWater, I will explain below.
About the heating system, In my simulation I have an Heat Pump Water Heater,
this object provides a model taht is compound object consisting of a water
heater tank, a direct expansion (DX) "coil" and a fan to provide air
flow. In my case the location of DX Coil compressor it´s outdoor and the water
heater tank it´s located in the zone.
Following the documentation and the example file (HeatPumpWaterHeater file) I
don´t have use AirLoopHVAC, because in the field of Heat Pump Water Heater I
connecting the three components (DX Coil, Water Heater tank and a fan.
My question it´s still I have use an AirLoopHVAC, since the DX Coil has been
connected to the WaterPumpWaterHeater!? Now I´m a little bit confused... Can
you explain better this procedure...
Thanks for your support and atention!
Best Regards
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx,
"James V Dirkes II, PE" <jvd2pe@...> wrote:
>
> Fernando,
>
>
>
> You have not connected the DX heating coil to any equipment or AirLoop.
The
> only heating coil you are using is the Coil:Heating:Water object. If you
> want to use the DX coil and a Heat Pump, you'll have to use a
> AirLoopHVAC:UnitaryHeatPump:WaterTo Air object.
>
>
>
> This object assumes that you also use a DX coil for cooling, so you may
have
> some difficulty. I think that a chiller and a HeatPump don't normally get
> used at the same time.
>
>
>
> BPT BizCard_RGB_0507
>
>
>
> There is good and there is evil. Love goodness.
> There is truth and there is falsehood. Love truth.
>
> There is beauty and there is ugliness. Love beauty.
>
> There is life and there is death. Love life.
>
> There is love and there is evil. Love love and hate hate.
>
> There is honesty and there is dishonesty. Love honesty.
>
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