Analysis of the procedures of passive calculation of cooling and definition of an effective control tool

The exploitation of resources natural ventilative constitutes an excellent tool for ensuring the passive cooling of buildings, especially in warm climates and in summer seasons. That means, the movement and the renewal of the air, that are major depending the consistency of temperature and pressure between the inside and the outside, subtract heat from the building structures for thermal convection. The phenomena occurs in a natural way, without the use of mechanical ventilators or energy consumption. This strategy, in addition to ensure the benefits coolant, also allows to improve the quality, purity and freshness of the air. The energy that must be supplied, or subtracted, by the air-conditioning system, in order to maintain conditions of thermal comfort within a space, can be determined through the analysis of the heat flows, between internal and external environments. Precisely in relation to this calculation, the analysis of flows is vital because they change depending on seasonal variations typical daily in local climate. In particular, the direction of origin of the flow, the persistence i.e. the duration of the same, the intensity and the amount of flow. This complex process gives reliable results in the design phase should be controlled by methods of calculation and simulation software dynamic. At present there is a method of calculating reliable and fully comprehensive, the purpose of the research and therefore, to identify among existing instruments the specifics of each in order to define and design a new methodology that allows to completely solve the problems inherent in the simulation design.