[TRNSYS-users] TRNSYS-users Digest, Vol 76, Issue 48

[David BRADLEY]

Jiang,
The first method is the correct one. The heating and cooling types that 
are built into Type56 are idealized and are intended to calculate the 
energy required to keep the space at a given temperature. The resulting 
loads give you an idea of the size of equipment needed to maintain those 
set points. By defining a thermostat and a delivery device you are able 
to calculate the actual energy required (accounting for the 
non-idealities of the equipment, the controls, and the delivery). Make 
sure that when you define your equipment and use the ventilation type 
for delivery you also reduce your simulation timestep to something 
reasonable for making control decisions (1 minute or 5 minutes probably).
best,
  David

On 4/13/2011 13:27, Jay Zhu wrote:
> Dear All:
>
> I have a question about the connection between the external heating 
> and cooling source, such as water source heat pump, air source heat 
> pump , and the building type 56, i tried two methods to simulate .
> 1, use the ventilation, supplied air flow ,air T, Humidity
> 2, use the heating and cooling type, supplied cooling power and 
> heating power.
> From the manual , either way should work, However, the results for the 
> two cases have a big difference in my simulation.
>
> Does anyone know the reasons or have some relative experience?   Thank 
> you in advance!
>
> Best
>
> Jiang
>
>
> _______________________________________________
> 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

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