External Convection Model (ASHRAE Simple)

ApacheCalc – Heat loss/gain calculations using CIBSE procedures to determine design heating/cooling loads.
ApacheLoads – Design heating/cooling loads calculations using ASHRAE Heat Balance Method.
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External Convection Model (ASHRAE Simple)

Postby kumudini1 » Tue Dec 25, 2012 4:59 am


What is the calculation method used in the simulation option, External Convection Model: ASHRAE Simple?
is it taking hc as a constant?

I could only find the McAdams Calculation method in the User guide.

And which method out of these 2 is more accurate for a detail simulation?

Please advice.

Thank you.

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Re: External Convection Model (ASHRAE Simple)

Postby PCully » Fri Dec 28, 2012 1:03 pm

all of the calculation methods details are published in the user guides, access these via VE Help menu >> User Guides and see the Thermal >> Reference section.

Where they state 3rd party methodologies then this should be clearly stated but often for licences or costing reasons IES can't publish these standards as well.

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Re: External Convection Model (ASHRAE Simple)

Postby bbrannon4 » Mon Feb 27, 2017 11:11 pm

Could IES please provide an update on this? All of the options are not identified in the user guide. Specifically, I can search the guide for "McAdams" and nothing shows up. Section 2.4.1 provides a brief description for 3/4 of the internal convection methods, but none of the external. And is the BS EN 15265 from 1004 or 2007?

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