Clarification on Summary Report output item?

asked 2017-02-16 15:21:10 -0500

Ed May
103 ●3

updated 2017-02-18 23:30:22 -0500

I'm new to EnergyPlus modeling and I'm wondering if anyone could clarify something for me on the results of a model I am working on? In a detailed Summary Report such as "WindowEnergyReportMonthly" there are several window energy results listed for each window surface:

Surface Window Transmitted Solar Radiation Energy (SumOrAverage)
Surface Window Transmitted Beam Solar Radiation Rate Energy (SumOrAverage)
Surface Window Transmitted Diffuse Solar Radiation Energy (SumOrAverage)
Surface Window Heat Gain Energy (SumOrAverage)
Surface Window Heat Loss Energy (SumOrAverage)

My questions is: does the "Surface Window Heat Gain Energy" result include the Transmitted Solar Radiation Energy in addition to any conductive/convective gains (is it a sum of all the monthly heat gains)? Or does it NOT include this transmitted solar gain and only represent conductive / convective gains?

I wasn't sure where to find a detailed description of the Output variable types for these reports and what exactly they include / exclude. Just looking at the results of my model it seems that this field does NOT include the solar gains, but I just wanted to be sure.

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answered 2017-02-17 01:29:27 -0500

mapascual

653 ●5 ●8 http://www.efinovatic.es/

You should use energyplus docs for clarification:

http://bigladdersoftware.com/epx/docs/8-6/input-output-reference/group-thermal-zone-description-geometry.html

Surface Window Heat Gain Energy [J]

The total heat flow to the zone from the glazing, frame and divider of an exterior window when the total heat flow is positive.

For a window without an interior shading device, this heat flow is equal to:

[Surface Window Transmitted Solar Radiation Rate (see definition, above)]

[Convective heat flow to the zone from the zone side of the glazing]

[Net IR heat flow to the zone from zone side of the glazing]

[Short-wave radiation from zone transmitted back out the window]

[Convection to zone from window frame and divider, if present]

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