ngkhanh's profile - activity

Check this modified_idf which I change Fan On Flow Fraction from autosize to 0.0 to get summer sizing day with zero PIU

Check this modified_idf which I change Fan On Flow Fraction from autosize to 0.0 to get summer sizing day with zero PIU

Hello, have any report or measure which show the value of peak zone latent load ? Thanks

Low Speed Gross Rated Total Cooling Capacity Hello, I autosize Low Speed Gross Rated Total Cooling Capacity and High Sp

ZoneControl:Thermostat:StagedDualSetpoint usage I am find the way to model rooftop units which actives staged (speed num

ZoneControl:Thermostat:StagedDualSetpoint usage I am find the way to model rooftop units which actives staged (speed num

ZoneControl:Thermostat:StagedDualSetpoint usage I am find the way to model rooftop units which actives staged (speed num

Thanks Julien for useful code. While I just work with one or two versions at same time, I find out this setup lauch for

Thanks Julien for useful code. While I just work with one or two versions at same time, I find out this setup lauch for

Thanks Julien for useful code. While I am just work with one or two versions at the same time, I find out this setup lau

Thanks Julien for useful code. While I am just work with one or two versions at the same time, I find out this setup lau

Thanks Julien for useful code. While I am just work with one or two versions at the same time, I find out this setup lau

I have both OpenStudio versions 2.8.1 and 2.9.1 installed on my Mac with rbenv Ruby 2.2.4 and .bash_ profile setup as follow:

## add openstudio 
export PATH="/Users/home/Desktop/App/Run/OpenStudio/OpenStudio_2_8_1/bin:$PATH"
export RUBYLIB="/Users/home/Desktop/App/Run/OpenStudio/OpenStudio_2_8_1/Ruby/"

wonder how to programtically jump between 2 versions (2.8.1 and 2.9.1) for scripting works?

multiple openstudio installations I have both OpenStudio versions 2.8.1 and 2.9.1 installed on my Mac with rbenv Ruby 2.

multiple openstudio installations I have both OpenStudio versions 2.8.1 and 2.9.1 installed on my Mac with rbenv Ruby 2.

multiple openstudio installations I have both OpenStudio versions 2.8.1 and 2.9.1 installed on my Mac with rbenv Ruby 2.

.bnd file is standard output created after running energyplus on idf file. Have anyway to get .bnd file from IDF without running simulation (both sizing and annual periods) ?

Thanks, I wonder how .BND file created in EP source code ?

DOE prototype and ASHRAE 90.1-2010 addendum as We updated the DOE prototype buildings 90.1-2004/2016 to run with EP 9.2

.BND output without running simulation .bnd file is standard output created after running energyplus on idf file. Have a

It's great to know it's on plan. I am ready of rebuild EP but wonder if I just need add a call to SetupOutputVariable at

energyplus source code output I tested example file HybridZoneModel.idf and see that there is not available output for

energyplus source code output I tested example file HybridZoneModel.idf and see that there is not available output for

energyplus source code output I tested example file HybridZoneModel.idf and see that there is not available output for

It's great to know it's on plan. I don't mind of rebuild EP but wonder if I just need add a call to SetupOutputVariable

energyplus source code output I tested example file HybridZoneModel.idf and see that there is not available output for

energyplus source code output I tested example file HybridZoneModel.idf and see that there is not available output for

OpenStudio::EpwFile doesn't work for me as _in.epw_ inside run folder stills Chicago. The measure CreateDOEPrototypeBuil

OpenStudio::EpwFile doesn't work for me as ~in.epw~ inside run folder stills Chicago. The measure CreateDOEPrototypeBuil

OpenStudio-standards weather file input I tried to create DOE prototype building with specified climate (included in Ope

OpenStudio-standards weather file input I tried to create DOE prototype building with specified climate (included in Ope

OpenStudio-standards weather file input I tried to create DOE prototype building with specified climate (included in Ope

'Workflow' in EnergyPlus Folder In Energyplus folder (V9.1) I have seen several python scripts (transition.py;energyplus

'Workflow' in EnergyPlus Folder In Energyplus folder (V9.1) I have seen several python scripts (transition.py;energyplus

In Energyplus folder (V9.1) I have seen several python scripts (transition.py;energyplus.py,...) with eplaunch package without any manual. What are the purpose for those scripts and can they run in normal python script ?

Update: tried to build EP-Launch.app for Mac and got below warnings in warn-eplaunch.txt - could not pip/conda intall org and any further options. The EP-Launch.app is unable to launch even in standard EP folder. How to fix it?
Follow-up: got release link from JasonGlazer:https://github.com/NREL/EP-Launch/releases - Just a symbol made me confused

missing module named org - imported by pickle (optional), /Users/kcu/Desktop/App/Install/EP-Launch/eplaunch/runner.py (top-level)
excluded module named _frozen_importlib - imported by importlib (optional), importlib.abc (optional), /Users/kcu/Desktop/App/Install/EP-Launch/eplaunch/runner.py (top-level)

No I could not find the link of mac.tar.gz at github site. That the reason why I try to build it

Thank you @JasonGlazer. I updated my case with error_log

'Workflow' in EnergyPlus Folder In Energyplus folder (V9.1) I have seen several python scripts (transition.py;energyplus

'Workflow' in EnergyPlus Folder In Energyplus folder (V9.1) I have seen several python scripts (transition.py;energyplus

I got some problems with implement workspace class :

1/ workspace.getObjectsbyType(IddObjectType) - what are available objects ? The IddObjectType links to "empty content" page.

2/ workspace.getObjectbyName(String, ExactMatch = true) - Which name will be checked as follow object?

!-   ===========  ALL OBJECTS IN CLASS: SETPOINTMANAGER:MULTIZONE:HUMIDITY:MAXIMUM ===========

SetpointManager:MultiZone:Humidity:Maximum,
    DOAS humidity max,       !- Name
    DOAS Ventilation air loop,  !- HVAC Air Loop Name
    0.008,                   !- Minimum Setpoint Humidity Ratio {kgWater/kgDryAir}
    0.0195,                  !- Maximum Setpoint Humidity Ratio {kgWater/kgDryAir}
    Node 13;                 !- Setpoint Node or NodeList Name

3/workspace.getObjectbyReference(RefName) - how to create and format reference name ? Have any example for this method ?

Hello, i would like to manually verify DX coil sizing in zonal equipment. The zone coil load should include ventilation and infiltration latent load. But unfortunately E+ standard report doesn't have them in desired format (g/kg instead of W). Update from Mr. Rraustad suggestion and E+ documentation : input as follow : Bases on psychrometric coil sizing formula :

set  standard air density (1,2 kg/ m3)

mixed air flow = User Calc air flow =0.884 m3/s = 0.857(return air flow) +0.027 (outdoor air flow)

Enthalpy outdoor (36oC, 0.02207g/kg) = 92.87 kJ/kg ;Enthalpy return air/room air (26oC, 0.01138 g/kg) = 55.21 kJ/kg

 Enthalpy supply air (14oC, 0.009 g/kg) = 36.87 kJ/kg

 Enthalpy mix = ( Outdoor air enthalpy * Outdoor air flow + Return air flow * Return outdoor enthalpy)/mixed air flow = 56.37 kJ/kg -> air temperature = 26.3 oC air density = 1.157 kg/m3 

   Performance CAPFT : x = mixed air wetbulb = 19.68 oC , y = outdoor drybulb = 36 oC

CapFT= 1.5509 + (-0.07505) * 19.68 + 0.0031 * 19.68^2 + 0.0024 * 36 + (0.00005) * 36^2 + 36 * 19.68 *(-0.00043) = 1.121

Coil capacity =  (Enthalpy mix - Enthalpy sizing zone ) * (air density) *  (airflow) /  (CapFT) 
                    =     (55.21 - 36.87) * 1.157 * 0.884 /1.121 = 17782 W

The coil report for PTAC :

Great Thanks to Mr Rraustad for validation.