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Re: [TRNSYS-users] Heat Pump mass flow rates (e.g. Type 401)

Michael,
Ideally, you need a radiator model that will deal with the water side, take room temperature from Type56 and output the convective and radiative gains to the space as outputs. Such a model exists in the TESS HVAC library for Trnsys17 if you have access to it (Type1231). If you do not, then I would imagine that you might be able to come up with a simplified set of equations that would give you the gains to the space that you need. 
Best,
 David


On 10/18/2012 09:24, Michael Diekerhof wrote:

David,

thanks a lot. I´ll have a look.
Could you please help me in another case. My plan is to connect the HP to a storage tank and then giving a temperature from the storage (type4) to my type56... How can I realize that my type 56 can be heated to achieve a constant room temperature of e.g. 20°C ?!
Someone told me that I must use HEATING and then INPUT... but what if i would like to simulate a simple radiator with a simple inlet temperature of e.g. 55°C.
Do you understand my problem? I dont know how to cover my heat demand out of the storage. 

Thanks in advance

Best,
Michael



Am 18.10.2012 16:16, schrieb David BRADLEY:

Michael,
I would recommend that you look online at manufacturer's sites for similarly sized heat pumps. Trane and Carrier both have significant amounts of performance data in the product literature parts of their sites. You can probably get a good estimate of the flow rates on both the condenser and evaporator sizes from them. 
Best,
 david


On 10/18/2012 03:53, Michael Diekerhof wrote:

Dear all,
I´m working with the heat pump non-standard type 401 and try to display an air-source heat pump.
I dont have typical values for the Input 2 (evaporator mass flowrate) and Input 4 (condenser mass flowrate). The only real connection I´m using is the dry bulb temp, coming from type 15, as the evaporator inlet temperature. For the massflowrates I would like to assume constant values.
How can I adjust an outlet condenser temperature of e.g. 55°C. Just about the massflowrates ?!
Does anyone have experience with heat pump mass flow rates?! I guess it´s not necessary to have expieriences with Type 401. 

I´m thankful for any advices.

Best,

Michael
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Am 18.10.2012 16:16, schrieb David BRADLEY:

Michael,
I would recommend that you look online at manufacturer's sites for similarly sized heat pumps. Trane and Carrier both have significant amounts of performance data in the product literature parts of their sites. You can probably get a good estimate of the flow rates on both the condenser and evaporator sizes from them. 
Best,
 david


On 10/18/2012 03:53, Michael Diekerhof wrote:

Dear all,
I´m working with the heat pump non-standard type 401 and try to display an air-source heat pump.
I dont have typical values for the Input 2 (evaporator mass flowrate) and Input 4 (condenser mass flowrate). The only real connection I´m using is the dry bulb temp, coming from type 15, as the evaporator inlet temperature. For the massflowrates I would like to assume constant values.
How can I adjust an outlet condenser temperature of e.g. 55°C. Just about the massflowrates ?!
Does anyone have experience with heat pump mass flow rates?! I guess it´s not necessary to have expieriences with Type 401. 

I´m thankful for any advices.

Best,

Michael
_______________________________________________
TRNSYS-users mailing list
TRNSYS-users@cae.wisc.edu
https://mailman.cae.wisc.edu/listinfo/trnsys-users







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Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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P:+1.608.274.2577
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