Careful what you measured. I have modeled radiant heat systems when trying to mitigate potential condensation on surfaces. What I found in E+ is that with the
same air temperatures for control, radiant heat uses more energy than an air heat system. This makes sense when you consider that a hot surfaces radiates more energy to cold surfaces and that comfort provided by radiant systems generally allows lower air
temperature as a compensation.
Ned Lyon, P.E. (MA, WV)
Staff Consultant
SIMPSON GUMPERTZ & HEGER
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From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
Sent: Friday, March 04, 2016 8:09 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: Not treated airflow
Thank you for your prompt answer.
I have modeled a room equipped with a hydronic ceiling radiant system and the convective heat transfer coefficient results in a quite low value compared with the experimental results data (the average value is 1.55 in the model vs the value
3/4.5 W/m2K of the experiments). That’s why I had the idea to study the effect of a higher air recirculation.
Mirko
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Posted by: "Edward G. Lyon" <EGLyon@xxxxxxx>
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