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    • We look into the future for you

    Krantz uses latest software programs to precisely calculate in advance the behavior of air flows and temperatures within buildings. Normally, we look at large volume rooms such as assembly halls, theaters, concert halls, airport terminals or atria by means of numeric simulations.

    Those simulations always have health promoting or even life-saving effects, when it comes to smoke exhaust scenarios or the natural ventilation of power plants.

    • simulation for determination of room temperature gradient with mechanical or natural ventilation
    • simulation for determination of comfort parameters like: indoor air velocity, supply air temperature, temperature distribution, radiation impact, etc.
    • calculation of ventilation effectiveness or local air exchange rates
    • evaluation of measures for façade-screening
    • energetic system comparisons
    • simulation of airflow around buildings, suction situations at buildings, spread of emissions
    • examination of smoke exhaust scenarios

    Examples of Use for Simulations

    • Theatre

      The renovation of a historic theatre included an entirely new design of the ventilation system which had to meet exacting requirements. Due to our high number of comparable reference projects, we were asked to support the planning and to examine the concept by means of simulations before carrying it out.

      The arrangement of the six galleries on top of each other requires an accurate adjustment of air volumes, so that there is no draught in neither the concert hall itself nor the orchestra pit. For the simulations, models with various scales were being made and component models were validated by laboratory testing as far as possible:

      • Validation of outlet behaviour using a one-person model
      • Examination of the interaction between two boxes about each other
      • Construction of a full model of one part of the building

      For every step, the results of the next smaller model were used to check the modeling. Due to the precise execution and examination, the simulation results reached a high degree of authenticity.

    • Airport

      Supply air was discharged into a newly built airport terminal via jet nozzles that were directed towards the 32 m high external façade. Under winter conditions, this system was due to prevent any cold air drop on the façades.

      Laboratory testing and simulation calculations carried out in the Krantz laboratory showed that the planned air supply could only effectively shield two thirds of the façade. In the lower part, a cold air drop is responsible for a reduction of comfort.

      Due to the investigations, countermeasures could be implemented at an early stage and therefore prevented from unnecessary costs for refitting.