About the Calculation Method “VDI 2089-1 Swimming Pools”
Explains the concept of determining the required air volumes for rooms in non-residential buildings based on the calculation method VDI 2089-1 Swimming Pools.
The VDI 2089-1 Swimming Pools calculation method is used to determine the required air volumes for swimming pool halls and adjoining rooms of publicly used swimming pool halls using ventilation and air conditioning systems.
Determining the Air Volume Flows for Swimming Pool Halls
The basis for determining the required air volumes for swimming pool halls is the evaporation of water within the pools, as the room air must be dehumidified accordingly due to the evaporated water volumes. When determining the air volumes for swimming pool halls, the outdoor air volume flows required for dehumidification with ventilation and air conditioning systems are calculated. For this purpose, the evaporated water mass flows of each pool are determined, taking into account the water vapor partial pressure and the water vapor content of the room air. In addition to the factors already mentioned, the water temperatures, the water transfer coefficients and the size of the evaporation surfaces of the individual pools are decisive for the extent of the evaporated water mass flows. With regard to the water transfer coefficients, the program offers different values that comply with the guidelines and depend on the type of pool, which you can adapt to the requirements of your project if necessary.
You can also include the evaporated water mass flows caused by water attractions in the calculation. The attractions cause the wave field caused by the bathers and the wave and current fields created by the attractions to overlap in the pool. This leads to an increase in the water transfer coefficient. To determine the extent of the increase in accordance with the guidelines, the values of the relative field enhancements of the various attractions taken from the guidelines are used. If your project includes attractions with aerated water mass flows, their water vapor output can also be determined by specifying the aerated mass flow and its water vapor content.
As any slides and white water channels in swimming pool halls cause additional evaporation, you can determine their evaporated water mass flows separately and, if necessary, also take existing water attractions into account.
The design outside air mass flow is determined based on the total evaporated water mass flow of all pools and any existing slides and white water channels. Based on this mass flow, the design outdoor air volume flow required for dehumidification with ventilation and air conditioning systems is determined, taking into account the density of the outdoor air.
Determining the Air Volume Flows for Ancillary Rooms in Swimming Pools
The way in which the required air volume flows for other rooms in swimming pools are determined depends on the type of use of the rooms. The type of use is determined by selecting the room type in accordance with VDI 2089-1. For supervision rooms, common changing rooms and changing areas, specific air volume flows are used that comply with the guidelines and relate to the area of the room. For shower and toilet rooms, specific air volume flow rates in accordance with the guidelines are used, which relate to the number of extraction points (showers, toilets/urinals). If necessary, you can adapt the specific volume flows to the requirements of your project.