Details on "Car Parks" (Project Level)
Information on the Car Parks section on room level of the Ventilation module in LINEAR Building.
In this area, configure the global settings for determining the required air volumes for rooms in non-residential buildings based on the calculation method VDI 2053-1 Car Parks (12-2014). In addition, this section provides an overview of all car parks in the project with their car park sections and assigned rooms, including the settings for the car parks and car park sections. The default values are compliant with guidelines and can be adjusted as needed.
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General Data
Distance Entry/Exit Parking Space
Defines the average distance traveled by individual vehicles to enter and exit parking spaces. Based on this value, the average carbon monoxide emissions caused by entering and leaving the car park are determined. As parking spaces are usually 5 m long, a default value of 10 m is stored. You can adjust the default value to the conditions of your project if necessary.
: One click restores the default value in accordance with the guidelines.
Carbon Monoxide Density
Specifies the density of the carbon monoxide. The default value is the density at sea level at 20 °C, which you can adapt to the requirements of your project if necessary.
: One click restores the default value in accordance with the guidelines.
Car Park Location: Drop-down list for defining the type of environment in which the car park is located. The car park location defines the carbon monoxide concentration of the outside air (Carbon Monoxide Concentration Outside), which can be adjusted if necessary.
Carbon Monoxide Concentration Outside
Specifies the carbon monoxide concentration in the outside air, which depends on the Car Park Location. The default value is 0 ppm for Residential Areas with Low Traffic and 5 ppm for Busy Roads. If necessary, you can adapt the values to the requirements of your project.
: One click restores the default value in accordance with the guidelines.
Table of Car Parks
In order to accurately determine the distances traveled by the vehicles, the car parks must be divided into car park sections, unless the car park is to be calculated on a flat-rate basis. Car park areas can be, for example, the individual parking decks, the parking rows of a parking deck or certain sections of parking rows.
In the table, you can create car parks and car park sections and enter the values required for determining air volumes. Click on an empty row in the table or use the F5 key to add car parks or car park sections. To create car park sections, at least one room must be assigned to the car park. A car park section is automatically created for each room assigned to a car park. You can use the F6 key to remove selected rows from the table. Only car park sections that are not assigned to a room or whose room is assigned to at least one other car park section can be removed. The number of parking spaces, the entry and exit routes into and out of the car park and the route along the parking spaces must be specified for each car park area. The entry and exit routes do not include routes that lead through other car park areas, as these routes are defined separately in the Routes through other Car Park Areas dialog. Open the dialog by clicking on 
in the S column.
By clicking 
you have the possibility to copy the contents of the table with or without column heading and paste it into Excel.
If you have selected individual rows or cells, you can copy the selected data with the key combinations Ctrl+C (with column heading) or Ctrl+Shift+C (without column heading) and paste it into Excel, for example.
| Column | Description |
|---|---|
| Name | Defines the name of the car park or car park area. |
| Rooms/Room | For car parks, clicking on For car park secitons, clicking on |
| Car Park Type | Drop-down list for defining the car park type with regard to the traffic volume and thus the utilization of the car park. For the three car park types Low Inbound and Outbound Traffic, Frequent Inbound and Outbound Traffic and Heavy Traffic, standard-compliant values are stored for the Utilization Factor, which cannot be adjusted. Car parks with low inbound and outbound traffic are, for example, residential and office car parks. Frequent inbound and outbound traffic takes place in public parking car parks, for example. Theater car parks are an example of heavy traffic. If you select Manual Specification, you can define the Utilization Factor yourself. An Aggregate Calculation is not possible for manual presettings. |
| f_SP | Utilization Factor Displays the utilization factors from the guideline for the car park types Low Inbound and Outbound Traffic, Frequent Inbound and Outbound Traffic and Heavy Traffic. If you select Manual Specification, you can define the utilization factor yourself. Note: It is recommended to estimate and determine the utilization factor together with the operator. |
| A.C. | Aggregate Calculation Enables an approximate calculation of the required air volumes for car park types with Low Inbound and Outbound Traffic, Frequent Inbound and Outbound Traffic, and Heavy Traffic. The net room area is multiplied by a specific volume flow rate depending on the car park type. No other information is taken into account in this calculation, and all settings and input options are deactivated. |
| Case under Consideration | Drop-down list for defining the exit and entry behavior in the car park. The entry and exit behavior is relevant with regard to the amount of pollutants produced by the vehicles, as the cold engines and the preceding cold starts of the exiting vehicles produce significantly more carbon monoxide than the warm engines of the entering vehicles. As it is assumed that no vehicles (with warm engines) enter the car park during the period under consideration in the Exits only case, the required outside air volume flow rate is deactivated to take this into account (V_outside_warm). |
| CO_Design | Carbon Monoxide Design Concentration in Car Park Defines the permissible indoor air condition with regard to carbon monoxide as a quarter-hourly average value. The default value is 60 ppm, which you can adapt to the requirements of your project if necessary.
|
| Ventilation Type | Drop-down list for specifying the type of ventilation or air flow in the car park. The selection determines the factor for the Deviation from Ideal Mixed Ventilation (f_G). If necessary, select Manual Specification to set the factor yourself. |
| f_G | Deviation from Ideal Mixed Ventilation Displays or sets the factor that takes into account the deviation from ideal uniform mixing. The factor depends on the selected Ventilation Type. Select Manual Specification to specify a factor yourself. |
| z_SP | Number of Parking Spaces Defines the number of parking spaces in the car park section. |
| s_Entry | Length of Car Park Entrance Specifies the length of the route from the car park entrance to the first parking space in the car park. This route is usually the same for all car park sections. However, in the case of car parks with multiple entrances, for example, the entrance routes for the individual car park sections may vary. In order to enable correct calculation in such cases, the distance is specified at the level of the car park sections. |
| s_Exit | Length of Car Park Exit Defines the distance from the last parking space in the car park to the car park exit. This route is usually the same for all car park sections. However, in the case of car parks with multiple exits, for example, the exit routes for the individual car park sections may vary. In order to enable correct calculation in such cases, the distance is specified at the level of the car park sections. |
| s_ParkingSpace | Distance along the Parking Spaces Defines the length of the way along the parking spaces of the car park section. |
| CS | Route through other parts of the car park Clicking on |
| V_outside_warm | Outdoor Air Volume Flow, Warm Displays the required outside air volume flow of the car park area, which is necessary due to the carbon monoxide emissions of the incoming traffic with warm motors. |
| V_outside_cold | Outdoor Air Volume Flow Rate, Cold Displays the required outdoor air volume flow rate of the car park area that is necessary due to the carbon monoxide emissions from exiting traffic with cold motors. Note: The emissions from exiting vehicles are calculated with a distance-independent minimum value for calculated driving distances of less than 80 m, because the carbon monoxide emissions for these short distances in the car park are largely determined by the cold start process. |
| V_outside | Total Outdoor Air Volume Flow for Car Park Section Shows the total outdoor air volume flow required for the car park section. This value corresponds to the sum of the two volume flows V_outdoor_warm and V_outdoor_cold. |
| V_tot | Total Outdoor Air Volume Flow Rate Shows the total required outdoor air flow rate for the car park, which results from the required warm and cold outdoor air flow rates for the individual car park sections. |