The need for an exact control of the indoor conditions in buildings is the main reason for different simulation methods as a help for designers and researchers. This paper is focused on the numerical analysis of ventilation of building for broilers during the summer period with the use of computer fluid dynamics (CFD) software from Fluent Inc. The summer period is particularly critical. This paper presents the results of measurement and CFD analysis of the flow pattern, thermal state and concentration of pollutants inside the broiler house. Calculation respected the Czech standard. Final results show the improved arrangement of ventilation. There are a lot of aspects which has to be included in the process of improving the function of an existing broiler house ventilation system. It is commonly required to find an acceptable balance between the financial costs and maximum obtainable functionality of the system. It is usually impossible to make great structural and interior changes for houses and therefore the geometrical shape and the configuration of inlets and outlets is almost definitely a given and non-changeable condition. The paper presents the CFD solution of miscellaneously improved cases for the various flow and shape configurations of the broiler house. Effects of the transversal and longitudinal ventilation are combined with the changes of inlet air streams directions and also with the different cross-section shaping obtained using curtains. All cases are evaluated and compared according to the same methodology. Results are discussed in terms of an existing state and also in terms of the expected costs needed for the ventilation system reconstruction.
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