Energy Conservation Measure

Add Wind and Stack Open Area

Name 
add_wind_and_stack_open_area
Display Name 
Add Wind and Stack Open Area
UID
8055497a-0d38-48eb-a643-76383fa54664

Version ID
15b25557-fec1-4ef3-b212-9f8e133ce2cb
Class Name 
AddWindAndStackOpenArea
Version Modified 
20181008T190647Z
Schema Version 
3.0
Rating 
0
No votes yet
Attributes 
Measure FunctionMeasure
Requires EnergyPlus Resultsfalse
Measure TypeEnergyPlusMeasure
Uses SketchUp APIfalse

Details

DescriptionThis measure models natural ventilation to thermal zones with operable windows. It is not intended to model natural ventilation that relies on interzone, stack driven air transfer.
Modeler DescriptionThis measure adds ZoneVentilation:WindandStackOpenArea objects to a zone for each window of a specified operable window construction. The user can specify values for minimum and maximum zone and outdoor air temperatures and wind speed that set limits on when the ventilation is active. The airflow rate is the quadrature sum of wind driven and stack effect driven air flow. Airflow driven by wind is a function of opening effectiveness, area, scheduled open area fraction, and wind speed. Airflow driven by the stack effect is a function of the discharge coefficient, area, scheduled open area fraction, and height difference to the neutral pressure level. This measure takes the height difference as half the window height, and as such is only intended to model natural ventilation in single zones where a few large operable windows or doors account for the majority of operable area. It is not intended to model natural ventilation that relies on interzone, stack driven air transfer where ventilation flow through a opening is unidirectional.
Files 
README.md
Office.osm
measure.rb
OpenStudio 2.7
Min Compatible Version: 2.7
AddWindAndStackOpenArea_Test.rb
Content visibility 
Public - accessible to all site users
Download

Measure Arguments

NameDisplay NameShort NameDescriptionUnitsTypeRequiredModel DependentDefault ValueChoicesMin ValueMax Value
constructionWindow Construction for Operable Windows:-(Leave blank to apply to all windows)-Choicetruefalse---
open_area_fraction_scheduleOpen Area Fraction Schedule-A typical operable window does not open fully. The actual opening area in a zone is the product of the area of operable windows and the open area fraction schedule.-Choicetruefalse----
min_indoor_tempMinimum Indoor Temperature (degC)-The indoor temperature below which ventilation is shutoff.-Doubletruefalse10---
max_indoor_tempMaximum Indoor Temperature (degC)-The indoor temperature above which ventilation is shutoff.-Doubletruefalse60---
delta_tempMaximum Indoor-Outdoor Temperature Difference (degC)-This is the temperature difference between the indoor and outdoor air dry-bulb temperatures below which ventilation is shutoff. For example, a delta temperature of 2 degC means ventilation is available if the outside air temperature is at least 2 degC cooler than the zone air temperature. Values can be negative.-Doubletruefalse----
min_outdoor_tempMinimum Outdoor Temperature (degC)-The outdoor temperature below which ventilation is shut off.-Doubletruefalse18.3333---
max_outdoor_tempMaximum Outdoor Temperature (degC)-The outdoor temperature above which ventilation is shut off.-Doubletruefalse25.5556---
max_wind_speedMaximum Wind Speed (m/s)-This is the wind speed above which ventilation is shut off. The default values assume windows are closed when wind is above a gentle breeze to avoid blowing around papers in the space.-Doubletruefalse5.4---

Measure Outputs

Comments

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