RE: [EnergyPlus_Support] Lowtemperature radiant object:

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Subject: RE: [EnergyPlus_Support] Lowtemperature radiant object:

From: "Geert Bellens" <geert.bellens@xxxxxxxxxxxxxxxxxxxxxx>

Date: Sun, 20 Oct 2013 14:33:04 +0200

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Does anyone has experience with this ?

I’m getting the idea that cooling rate is only calculated based on the water mass flow rate and the chilled water inlet temperature.

This means you can’t simulate the effect of different tube spacings. Or am I wrong�.?>

This also means the material where the tubes are located in, act as a 100% efficient heat exchanger.
Even with on little tube you could simulate a normal working chilled ceiling for a whole office�

Geert Bellens

Van: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] Namens geert.bellens@xxxxxxxxxxxxxxxxxxxxxx
Verzonden: zaterdag 19 oktober 2013 17:53
Aan: EnergyPlus_Support@xxxxxxxxxxxxxxx
Onderwerp: [EnergyPlus_Support] Lowtemperature radiant object:

I'm using a lowtemperatureRadiant:VariableFlow to simulate a chilled ceiling. The results seem to be correct.

However, when I'm playing with the properties of the chilled ceiling, nothing happens...

Changing the tube length from 1760 meters to 176 gives no difference, even if I reduce it to 10 meters...

Changing the tube spacing (internal source) from 0.05m to 0.3 meter gives no difference

Changing the tube diameters doesn't change anything.

Euhm... is this normal? How is a lowtemperatureradiant object being calculated if changing these parameters won't change a thing in the results ?

Geert

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