It is difficult to tell what you have in your system.
If you post or attach your IDF (the template original, if you are using template model.)m I will have a look at it.
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: richardluo88@xxxxxxxxxxxxxx
Date: Fri, 21 Oct 2011 16:29:04 -0400
Subject: [EnergyPlus_Support] How to control the system with UnitaryHeatPump:WaterToAir
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Primary EnergyPlus support is found at:
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If you post or attach your IDF (the template original, if you are using template model.)m I will have a look at it.
The cooling and heating using a HP are simulated separately with two loops.
If you do not enter the heating loop in EPlus, they are not installed. Supplemental coil and/or heater are provided, because HP will not run efficiently when the evaporating coil is at a temperature of lower than 5°C.
The condenser loop is controlled by the temperature of the condensing coil of the HP, when it is in the cooling mode. When the zone cooling is turned off, the compressor pumps stops, condenser coil temperature falls, and the condenser loop pump is turned off. This is the general way a system operates.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: richardluo88@xxxxxxxxxxxxxx
Date: Fri, 21 Oct 2011 16:29:04 -0400
Subject: [EnergyPlus_Support] How to control the system with UnitaryHeatPump:WaterToAir
Hello,
I am trying to simulate a model with condenser system, which means the dx cooling coil connected with a cooling tower.
So I choose UnitaryHeatPump:WaterToAir to realise it. (So I have to turn off the heating coil and supplemental coil)
But I find it's hard to give all the parameters for such a component. And I can only use fan:onoff and there is no water coil controller so that I can't control the supply temperatures properly.
Do you have any suggestions for simulating such a model? How can I put in all these parameters in?
And most important, how can I get it better controlled?
(I already build the model, it run successfully. But the zone temperature changes a lot and I can't get the unmet load hours down to 300 hours.)
Looking forward to your reply!
Thanks.
Chen
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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