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

[David BRADLEY]

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

-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com