[EnergyPlus_Support] Heat Exchanger 2.0

Dear all,

I made the storage tank volume small and the result was that the energy in the source side is almost the same than in the use side ( for an ideal heat exchanger). Thanks for this idea.

Now I'm trying to do something like connecting a Boiler a Storage tank (volume small) and a Baseboard Radiant Convective Water. But simulation ends with an error:

** Warning ** PlantManager: No Setpoint Manager Defined for Node=303 in PlantLoop=RADIATORLOOP

** ~~~ ** Add Temperature Setpoint Manager with Control Variable = "Temperature" for this PlantLoop.

** Fatal ** Previous severe set point errors cause program termination

I am sure that i define a setpoint manager in node 303 with control variable "temperature"

I attach a file with the connection scheme. It is a very simple scheme just for just to check the operation of the exchanger.

Anyone know how I can resolve this error? Why this error appear?

Thanks

De: "Griffith, Brent" <brent.griffith@xxxxxxxx>
Para: "EnergyPlus_Support@xxxxxxxxxxxxxxx" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Enviado: jueves 19 de enero de 2012 17:47
Asunto: RE: [EnergyPlus_Support] Heat Exchanger

Omar,

I agree with Karen here. Note that the WaterHeater:* storage tanks have an input field called Source Side Effectiveness that provides simple model for just such a heat exchanger.

Brent

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Karen Walkerman
Sent: Thursday, January 19, 2012 8:15 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Heat Exchanger

Hi Omar,

I think the best way to do this is to connect the solar collectors to a Hot Water storage tank, and then connect the storage tank to the supply side of the second PlantLoop. To get a pretty direct coupling between the two loops, make the storage tank volume small. I have tried using the water/water heat exchanger for something other than free cooling with poor results.

Karen

On Thu, Jan 19, 2012 at 9:50 AM, Chandan Sharma <csharma@xxxxxxxxxxxx> wrote:

Omar,

Not sure about the answer to your question. The plate heat exchanger is basically meant to allow free cooling and thats how its operation scheme is set up internally in EnergyPlus.
But you can try connecting heat exchanger as you desire and see the results. If you are trying to model Integrated Collector Storage (ICS), this technology will be added to EnergyPlus in the upcoming release.
Sorry for the inconvenience.
Hope this helps.

Chandan

On 1/19/2012 8:02 AM, Omar Tabuyo wrote:

Dear all,

A fluid/fluid heat exchanger is designed to couple one condenser loop to another condenser loop, but i need to connect two plant loop because there is a heat exchanger among solar collectors and the storage tank.

Is it possible to create this cofiguration in Energy Plus? Could I couple two plant loop with a heat exchanger?