LINEAR Solutions 26 for AutoCAD

About the Calculation Method "VDI 2053-1 Car Parks (12-2014)"

Explains the concept of determining the required air volumes for rooms in non-residential buildings based on the calculation method VDI 2053-1 Car Parks (12-2014).

Application Range of the Method

This calculation method is used to determine the air volumes required for the removal or dilution of pollutants in buildings or building parts used for parking motor vehicles. It can be used for the air volume determination of both aboveground and underground closed medium (100 m² - 1000 m²) and large car parks (> 1000 m²). The method does not support air volume determination for rooms in car parks intended for longer stays.
Note: When using this method, an additional alignment with the current, locally applicable regulations (car park regulations of the countries) is indispensable.

Determination of the Required Air Volume Flow Rates for Car Parks

In this calculation method, the carbon monoxide emissions arising from motor vehicle traffic are determined. The required outdoor air volume flow rates are calculated by considering the density of carbon monoxide, the carbon monoxide concentration in the outdoor air, and the type of ventilation in the car park to comply with the limit value for carbon monoxide concentration.

The carbon monoxide concentration in the outdoor air depends on the car park location. Through the location selection, the corresponding concentration is determined, which can be adjusted to different location conditions if needed. For the type of ventilation, common types of ventilation are offered for car park ventilation, with the corresponding factors for the deviation from ideal mixed ventilation (homogeneous concentration distribution) stored for each of them. For cases not covered by the offered types of ventilation, there is the option for a manual entry of the factor.

The determination of the total carbon monoxide emissions is based on the identified emissions per vehicle and the amount of vehicle movements. By determining the type of use of the car parks, the amount of incoming and outgoing traffic is determined and the corresponding utilization factor is assigned.
Note: It is recommended to estimate and determine the utilization factor together with the operator.
Using the utilization factor and the amount of parking spaces, the hourly vehicle movements are determined. The extent of carbon monoxide emissions is also determined by the type of vehicle movements. This is due to the fact that the emissions from outgoing vehicles with cold motors and a preceding cold start differ significantly from the emissions of incoming vehicles with motors at operating temperature. The carbon monoxide volume flow rates arising from the different types of vehicle movements and the corresponding required outdoor air volume flow rates are output separately (cold/warm).

In order to accurately record the distances traveled by the vehicles, the car park must be divided into car park sections, unless the car park is to be charged at a flat rate. In addition to details such as the number of parking spaces and the entry and exit routes, the entry and exit routes that lead through other car park sections must be defined for each car park section. From this data, the total carbon monoxide output in the car park is determined, and the outdoor air volume flow rate is calculated, which is necessary for maintaining the carbon monoxide concentration with ventilation systems.

As an alternative to this detailed air volume calculation, an approximate calculation of the required air volumes can also be performed (aggregate calculation). This involves multiplying specific volume flows, which depend on the type of car park, by the net room area.