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Re: [TRNSYS-users] Modelling a cooling coil Type 123



Max,

 If you have access to the TESS HVAC library you will find a Type508 cooling coil model that includes the control mode that you are looking for.

kind regards,

 David


On 10/07/2021 02:35, Max Philipp Krebs via TRNSYS-users wrote:
Hi there,

I have a question concerning a cooling coil.

I want to model a cooling coil Type 123. My goal is to implement a set
temperature for the outlet fluid temperature. For example: Cooling power
should only be provided if the inlet air temperature is above 20°C and
then the coil should have a set temperature for the outlet air temperature
to be around 21°C.
How can I do this? On/Off Controller doesn't work because there is always
the error that the cooling capacity must be greater than 0 which obviously
isnt the case if the inlet temperature is below 20°C.
I have tried it with an equation and a gt-function but the result isnt
satisfying.

Thanks for your help!

Regards,
Max


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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@tess-inc.com

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