[TRNSYS-users] Possible bug with type919 water source heat pump

[David BRADLEY]

Jim,

   The quick fix is that you can set the units of the fraction of 
outside air to "variable name" (or "string" if you're using v17) and 
then define and use an equation that sets the fraction of outside air 
rather than keying in a value.

   The more rigorous fix is the following:

- open the Type919 proforma from within the Simulation Studio.

- switch to the "variables" tab, click on the "variables" button and 
then filter on "inputs"

- find the "fraction of outside air" input and click the "modify" button.

- make sure that the "type" field is set to "real" and not "integer"

- save the change in the proforma, close it and then drag a new one out 
into your project. Check to make sure that you can set the value to 
anything between 0 and 1

Once you have verified that the fix works, you'll need to right click on 
the instance(s) of Type919 in your project and select "replace" from the 
context menu.

kind regards,

  David


On 09/16/2021 10:03, dimitris soukoulis via TRNSYS-users wrote:
>
> Dear All,
>
> While trying to change the input #20: Fraction of outside air, from 
> the type919 Water source heat pump, I realized that the only possible 
> values it accepts are 0 and 1. Everything in between will not work. Is 
> there a simple fix for that problem, or is it a coding problem?
>
> Kind regards,
>
> Jim Soukoulis
>
> NTUA
>
>
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> TRNSYS-users at lists.onebuilding.org
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

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

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

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