Solar Gain in EnergyPlus

asked 2017-12-25 13:39:18 -0600

Ali Raad
185 ●8

updated 2017-12-26 16:08:00 -0600

__AmirRoth__

4436 ●5 ●17 http://bleedinggreenna...

Hello,

I am working on a model in E+ and I would like to compare it to a model created on IESVE. In IESVE there is an output called Solar Gain.

It is defined by IESVE as "Solar gain: Solar radiation absorbed on the internal surfaces of the room, plus solar radiation absorbed in glazing and transferred to the room by conduction."

I have checked the output:variable in E+ and I have not found any output to match that. Could anybody help me with that? I would like to know what is the output:variable should I request for Solar Gain in a zone. Or if you have any other suggestion how can I compare the solar gain of the models please let me know.

Thank you very much, your help is highly appreciated.

answered 2017-12-25 14:42:01 -0600

Avi
4320 ●2 ●11

From the Input Output Reference, how about those outputs?

1.9.44.13 Surface Window Transmitted Beam Solar Radiation Rate [W]
1.9.44.14 Surface Window Transmitted Beam Solar Radiation Energy [J]
The solar radiation transmitted by an exterior window whose source is beam solar incident on the outside
of the window. For a bare window, this transmitted radiation consists of beam radiation passing through
the glass (assumed transparent) and diffuse radiation from beam reflected from the outside window reveal,
if present. For a window with a shade, this transmitted radiation is totally diffuse (shades are assumed
to be perfect diffusers). For a window with a blind, this transmitted radiation consists of beam radiation
that passes between the slats and diffuse radiation from beam-to-diffuse reflection from the slats. For a
window with a screen, this value consists of direct beam radiation that is transmitted through the screen
(gaps between the screen material) and diffuse radiation from beam-to-diffuse reflection from the screen
material.
For each zone time step,
Surface Window Transmitted Beam Solar Radiation Rate = Surface Window Transmitted Beam To
Beam Solar Radiation Rate + Surface Window Transmitted Beam To Diffuse Solar Radiation Rate
Surface Window Transmitted Beam Solar Radiation Energy = Surface Window Transmitted Beam To
Beam Solar Radiation Energy + Surface Window Transmitted Beam To Diffuse Solar Radiation Energy