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Outside Convection coefficient in EnergyPlus

asked 2015-11-01 11:41:12 -0500

s_pourm gravatar image

updated 2015-11-01 15:10:19 -0500


I defined the outside face convection coefficient as an output. I see in some hours during the simulation, this coefficient is 1000 !!! How is that possible? And also in general , which method is more accurate? Because I changed the SurfaceConvectionAlgorithm:Outside from DOE-2 to AdaptiveConvectionAlgorithm and saw a significant difference in one of my outputs.

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answered 2015-11-01 14:14:21 -0500

According to Energyplus Engineering Reference (

Note that when the outside environment indicates that it is raining, the exterior surfaces (exposed to wind) are assumed to be wet. The convection coefficient is set to a very high number (1000) and the outside temperature used for the surface will be the wet-bulb temperature. (If you choose to report this variable, you will see 1000 as its value.)

It seems that you have rain data included in your weather file.

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Thank you. Thats right.

s_pourm gravatar image s_pourm  ( 2015-11-01 20:00:28 -0500 )edit

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Asked: 2015-11-01 11:41:12 -0500

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Last updated: Nov 01 '15