About the Calculation Method "VDI 2052-1 Kitchens (04-2017)"

Application Range of the Method

This method is used to determine the required air volumes for kitchens and associated areas where food is prepared, served, and distributed, dishes and devices are washed, and food is stored. The method does not support air volume calculation for commercial small kitchens whose heat and humidity-emitting appliances (e.g., cooking devices, dishwashers) have a total connection capacity of less than 25 kW.

Determination of the Required Air Volume Flow Rates for Car Parks

In this calculation method, the required air volumes are determined to ensure the removal of heat and substance loads caused by kitchen appliances, considering possible simultaneity of device usage and the prevailing flow type in the room.

Individual blocks are defined that contain the devices, differentiating between blocks under exhaust air hoods, ceilings, and free installation blocks. From the thermal currents of the blocks, the required detection volume flow rates are determined, which are necessary for the removal of the loads.

From the dimensions of the blocks, their hydraulic diameters are determined, with which the heat flow rate of the block is calculated. The type of airflow in the room can disrupt the heat flows. These purge flows from the heat flow are considered in the calculation through the purging degree. The determining factor for the extent of the required volume flow rates is also the height of the detection equipment above the blocks or appliances. If the height of a device differs from that of its block, calculations are no longer made with the heat flow of the block, but with the heat flow rate of the individual appliances. The position of the blocks in the room determines the reduction factor in the calculation of heat flows. If the heat flows from free installation blocks create too many loads in the room, an additional compensating volume flow rate is needed to dissipate the loads. This is displayed in the results.

Furthermore, the air volumes required for dishwasher operation can be determined. During operation, heat emissions are emitted from the machine and the wash ware. Different washing methods with corresponding machine types are available for determining the resulting machine loads. Depending on the type of machine, you can select between typical default values for heat emission and hourly plate capacity. When defining the wash ware, predefined types of wash ware are offered with stored factors for their heat capacity, which, together with the dwell time of the wash ware in the room, result in the loads of the wash ware. The required supply and extract air volume flow rates are determined from the loads of the machine and the wash ware, taking into consideration the inlet and outlet temperatures of the room air.