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[EnergyPlus_Support] water-water plate heat exchanger
- To: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Subject: [EnergyPlus_Support] water-water plate heat exchanger
- From: "Jean marais" <jeannieboef@xxxxxxxxx>
- Date: Thu, 17 Nov 2011 16:55:23 -0000
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- Delivery-date: Thu, 17 Nov 2011 09:55:26 -0700
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Dear Group + Developers,
I am trying to simulate a water-water plate heat exchanger. The district heat comes in on the source side, goes into the HX and out at a lower temperature. On the user side, water comes in from a Low Temp Radiant system, enters the HX and leaves at a higher temp. The HX has a rated capacity of 66 kW.
I have modeled this using a waterheater:mixed object, setting the electric heating to zero so that it uses the source water only to bring the tank to the user side supply temperature of 32°C. Works just fine, but for the fact that setting the tank volume too small, kills it. But having a 1 m³ tank volume instead of a 0.001 m³ (which kills it), brings a possibility for the user side to draw energy, momentarily exceeding the 66 kW.
1) Can this simulation be done differently using waterconnections objects or a combination?
2) What is the minimum tank volume here, or does it depend on many factors such as flow rate etc.?
3) Are there plans to support a water-water HX object?
Regards,
Jean Marais
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