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

[David Bradley <bradley@tess-inc.com>]

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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