[TRNSYS-users] Modelling heat pump and air handling unit

[David Bradley]

Samir,
   In my opinion, the Type20 heat pump model is quite limited. It assumes 
that you have two sources from which heat can be provided and assumes that 
hot water (usually from solar) is one of them. Furthermore, it does not 
provide any cooling functions. There are some more flexible heat pump 
models available in the TESS HVAC Library if you have access to that.
   You can model part of an air handler using Type92 but doing so is a very 
simplified method; Type92 simply reports the amount of energy required to 
take a liquid flow stream from an inlet condition to a set point 
temperature. In combination with some other models (heat exchangers, pumps, 
and fans) you can approach modeling an air handler in this way but again 
there are some more flexible models available in the HVAC Library add-on. 
If you are interested in more information about the HVAC library, you can 
visit http://www.trnsys.com.
Cheers,
  David


At 05:06 1/4/2007, Chehal, Samir wrote:
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>Dear all,
>
>I must study the energy consumption of a building and I must use a heat 
>pump to produce energy and some air handling unit to treat the building.
>
>I don't know what type to use to modeling a heat pump (type 20?) and a air 
>handling unit (type 92?).
>
>I define a Multi-zone building project, and I don't know how to do to 
>connect the pump and the air handling unit to my project.
>
>My building is composed of 5 zones.
>
>I wish implement one air handling unit to each zone and describe the 
>ventilation schedule to each air handling unit.
>
>Thanks all.
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Thermal Energy System Specialists (TESS), LLC
David BRADLEY                           2916 Marketplace Drive - Suite 104
Partner                                        Madison, WI 53719
Phone: (608) 274-2577 USA
Fax: (608) 278-1475
E-mail: bradley at tess-inc.com
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