Radiant flow system with heating only

I found two posts on UnmetHours about this question but it doesn't help me. I want to use a LowTemperatureradiant:variableFlow without cooling. However, this object also brings a Coil:Cooling.

In this post, @MatthewSteen suggests to create an Always Off schedule and assign it to the cooling coil. But unlike the others coils (such as Coil:Heating:Water) I don't see any Availability schedule for this one: image description

The only Schedule is for control temperature in °C and does not accept a ON/OFF schedule. No more help with this answer which doesn't seem to work with OS, as pointed out by @ethankheil.

How to get rid of cooling with this object ?

737

Urado

asked 2016-04-25 10:51:53 -0500

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__AmirRoth__

updated 2017-05-08 18:36:34 -0500

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A quick fix waiting for a better solution.

It is possible to link the Coil:Cooling with a "fake" cooling water loop with an airflow set to 0. I have to double check if this doesn't have any impact on simulation. It adds some warnings but it seems to work as intended.

Urado (2016-04-25 11:09:40 -0500) edit

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@MatthewSteen will probably be able to confirm but the always off Schedule method is no more relevant (maybe an OpenStudio update ?).

A solution is to hard sized the maximum Cold Water Flow to 0 m^3/s and to not link the Coil:Cooling to a water loop: image description

Edit: The '0' in Hard sized has to be overwrited, else it returns to Autosized !

737

Urado

answered 2016-04-26 05:12:54 -0500, updated 2016-04-26 05:33:11 -0500

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Correct, in order for the 0 to stick you must click in the field. Otherwise it will be returned to Autosized. See this GitHub issue: https://github.com/NREL/OpenStudio/is...

MatthewSteen (2016-04-26 06:47:39 -0500) edit

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SO are you succeed in modeling a radiant floor heating system? I am trying to do it, but it is very difficult, would you please share a simple example? Thank you sosososo much!