[TRNSYS-users] 4-way tempering valve

[David BRADLEY]

Arrate,

   Most tempering valves that I am familiar with are three-way (they mix 
cold water in with a source that is hotter than the desired delivery 
temperature). There is a model of such a valve in the standard Trnsys18 
library. If you are using Trnsys17 then there is a model in the TESS 
Controllers library or the same function can be achieved using Type11. 
To use Type11 for this, have a look at its documentation; there is an 
example of setting it up as a tempering valve.

   I am not sure what the 4th way is used for in your case. Is it 
perhaps to bring the temperature up to a minimum allowable value using 
water from a hot source? If so then you might be able to use two 
tempering valves in sequence to achieve this. Trnsys18 has both heating 
and cooling tempering valve controller models. If you are using an 
earlier version you'll need to be a little clever about how you apply 
the models' control signals because those models are only set up for 
cooling applications.

kind regards,

  David


On 03/08/2019 07:35, ARRATE HERNANDEZ via TRNSYS-users wrote:
> Dear users,
>
> I want to fix an output value, the flow rate to load, in a 4-way 
> tempering valve to use it in a DHW loop. Could you help me? Thanks,
>
> Arrate
>
>
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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
F:+1.608.278.1475
d.bradley at tess-inc.com

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

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