The EP output variables used in calculation of the variables on the Read EP Results component

I want to know the EP output variables used to calculate the output on the Read EP Results and Read EP Surface Results components.

May I ask if the following list is correct?

May I also ask what the EP output variables are to calculate outdoorAirEnergy?

Thank you very much!



Output variables on the Read EP Results component:

[1] totalThermalEnergy
=
cooling
+
heating


[2] thermalEnergyBalance
=
cooling (-)
and
heating (+)


[3] cooling
=
Zone Ideal Loads Supply Air Total Cooling Energy J
=
Zone Ideal Loads Supply Air Sensible Cooling Energy J
+
Zone Ideal Loads Supply Air Latent Cooling Energy J


[4] heating
=
Zone Ideal Loads Supply Air Total Heating Energy J
=
Zone Ideal Loads Supply Air Sensible Heating Energy J
+
Zone Ideal Loads Supply Air Latent Heating Energy J


[5] electricLight
=
Zone Lights Electric Energy J


[6] electricEquip
=
Electric Equipment Electric Energy J


[7] peopleGains
=
Zone People Total Heating Energy J


[8] totalSolarGain
=
Zone Windows Total Transmitted Solar Radiation Energy


[9] infiltrationEnergy
=
Zone Infiltration Total Heat Gain Energy (+)
and
Zone Infiltration Total Heat Loss Energy (-)


[10] outdoorAirEnergy
= ???


[11] natVentEnergy
=
Zone Ventilation Total Heat Gain Energy (+)
and
Zone Ventilation Total Heat Loss Energy (-)


[12] operativeTemperature
=
Zone Operative Temperature


[13] airTemperature
=
Zone Mean Air Temperature


[14] meanRadTemperature
=
Zone Mean Radiant Temperature


[15] relativeHumidity
=
Zone Air Relative Humidity


[16] airFlowVolume
=
[infiltrationFlow] Zone Infiltration Standard Density Volume Flow Rate
+
[natVentFlow] Zone Ventilation Standard Density Volume Flow Rate
+
[mechSysAirFlow] Zone Mechanical Ventilation Standard Density Volume Flow Rate
+
[earthTubeFlow] Earth Tube Air Flow Volume


[17] airHeatGainRate
=
[surfaceAirGain] Zone Air Heat Balance Surface Convection Rate
+
[systemAirGain] Zone Air Heat Balance System Air Transfer Rate



Output variables on the Read EP Surface Results component:

[1] surfaceIndoorTemp
=
Surface Inside Face Temperature


[2] surfaceOutdoorTemp
=
Surface Outside Face Temperature


[3] surfaceEnergyFlow
=
[opaqueEnergyFlow] Surface Average Face Conduction Heat Transfer Energy
+
[glazEnergyFlow] Surface Window Heat Gain Energy


[4] opaqueEnergyFlow
=
Surface Average Face Conduction Heat Transfer Energy


[5] glazEnergyFlow
=
Surface Window Heat Gain Energy


[6] windowTotalSolarEnergy
=
Surface Window Transmitted Solar Radiation Energy


[7] windowBeamEnergy
=
Surface Window Transmitted Beam Solar Radiation Energy


[8] windowDiffEnergy
=
Surface Window Transmitted Diffuse Solar Radiation Energy


[9] windowTransmissivity
=
Surface Window System Solar Transmittance


2 Likes

Grasshope

Did you get this list by looking at the code in the Honeybee_Read EP Surface Result?

If so its correct.

Grasshope,

For a detailed explanation of outdoor air, see our other discussion:

http://www.grasshopper3d.com/group/ladybug/forum/topic/show?id=2985…

For almost everything else, you correct. There’s only a few corrections:

[3] surfaceEnergyFlow
=
[opaqueEnergyFlow] Surface Average Face Conduction Heat Transfer Energy
+
[glazEnergyFlow] Surface Window Heat Gain Energy

-
[glazEnergyFlow] Surface Window Heat Loss Energy


[4] opaqueEnergyFlow
=
Surface Average Face Conduction Heat Transfer Energy


[5] glazEnergyFlow
=
Surface Window Heat Gain Energy

-
Surface Window Heat Loss Energy

Let me know if you have any feedback about the outputs that I thought were useful and how I combine some of them.

-Chris