Dear Jeannieboef
The sizing routine effectively exchanges energy directly with the air such as to keep the setpoint at all times and is not subject to the same "lag" as the radiant system.
what is this "lag" that you are referring to? is it this one?
a) the radiant heat gain will lag in conventioanl system and it will be stored in thermal mass where as the radiant heat gain will not lag and rather it becomes instantaneous load. " lag" will be lesser than the conventioanl system...because here radiant heat transfer is also predominant where as in conventional convective heat transfer is predominant.
Make sure your design day set point curve is a flat line and that all internal loads associated with it are also a flat line. This gives a nice steady state peak.
How to do this? how to make sure that setpoint curve a flat line? Can you please elaborate this
Thank you,
Rakee
From: "Jean Marais jeannieboef@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Tuesday, 13 February 2018 11:36 AM
Subject: Re: [EnergyPlus_Support] unable to reach set point temperatures in zones
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