Ventilation Properties
The Properties For: Ventilation dialog opens when the Component: Ventilation Project Tree object’s pop-up menu is activated in the OpenBuildings Energy Simulator Project Tree and the Properties menu item is selected.
It contains controls used to view, create and modify ventilation components and properties for selected rooms. Ventilation is the purposeful flow of outside air into a thermal zone in order to provide some amount of non-mechanical cooling.
Property heading | Properties |
---|---|
New | Used to create new ventilation sub-components, each
with the same properties of the default ventilation component as defined in the
Room Type Manager
dialog box’s Ventilation
panel.
|
Name | Used to enter a name for the ventilation sub-component. |
Design flow rate calculation method | Contains controls used to select a design flow
calculation method for the selected room’s ventilation sub-component. When one
is selected, a corresponding method value field is enabled under the Design
flow rate calculation method control.
|
Design flow rate | Used to enter a flow rate when the Flow rate per room Design flow calculation method is selected. The Design flow rate denotes the full design volume flow rate which is the maximum amount of infiltration expected at design conditions. |
Flow rate per zone floor area | Used to enter a flow rate when the Flow rate per area Design flow calculation method is selected. The Flow rate per zone floor area is used to determine the maximum amount of infiltration expected at design conditions for the specific area occupied by the selected room type within the zone. |
Flow rate per person | Used to enter a flow rate when the Flow rate per person Design flow calculation method is selected. The Flow rate per person is used to determine the maximum amount of infiltration expected at design conditions for the number of people occupying the selected room type. |
Air changes per hour | Used to enter the number of air changes per hour rate when the Air changes per hour Design flow calculation method is selected. The Air changes per hour is used to determine the maximum amount of infiltration expected at design conditions based on the number of times in each hour the air volume changes due to infiltration. |
Schedule | Used to select an occupancy schedule for the selected room’s ventilation sub-component. |
Ventilation type | Contains controls used to select the nature of the
ventilation occurring for the selected room’s ventilation sub-component.
|
Fan pressure rise | Used to enter a pressure rise experienced across the fan used for the selected room’s ventilation sub-component. |
Fan total efficiency | Used to enter a total fan efficiency factor (a decimal number between 0.0 and 1.0) for fans used for the selected room’s ventilation sub-component. |
Constant term coefficient | Used to enter a modifying parameter (a function of environmental conditions) used to solve the ventilation equations performed for the selected room’s ventilation sub-component. The Constant term coefficient is constant under all conditions, and is therefore dimensionless. |
Temperature term coefficient | Used to enter a modifying parameter (a function of environmental conditions) used to solve the ventilation equations performed for the selected room’s ventilation sub-component. The Temperature term coefficient is modified by the temperature difference between the outdoor and indoor air dry-bulb temperatures. |
Velocity term coefficient | Used to enter a modifying parameter (a function of environmental conditions) used to solve the ventilation equations performed for the selected room’s ventilation sub-component. The Velocity term coefficient is modified by the speed of wind being experienced outside the building. |
Velocity squared term coefficient | Used to enter a modifying parameter (a function of environmental conditions) used to solve the ventilation equations performed for the selected room’s ventilation sub-component. The Velocity squared term coefficient is modified by the square of the speed of wind being experienced outside the building. |