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COB743 INTEGRATION OF BUILDING AIR FLOW MODELS OF DIFFERENT RESOLUTION

Cezar Otaviano Ribeiro Negrão

Departamento de Engenharia Mecânica - UFSC, Caixa Postal 476, CEP 88.040-900 Florianópolis, Brasil - E-mail: negrao@nrva.ufsc.br

Building air flow models, such as those derived from Computational Fluid Dynamics and fluid flow network are investigated and their deficiencies are identified. In the first, the air flow is defined in high resolution, allowing the evaluation of temperature and velocity gradients within enclosures. However, the boundary conditions cannot be well established. Although the later allows computation of air infiltration and ventilation for the entire building, air velocity, pressure and temperature are assumed uniform within spaces. A new modelling approach, which combines the two methodologies and reduces their shortcomings, is proposed. The potential of such technique is demonstrated by a case study.

Keywords: Building Air Flow Simulation, Computational Fluid Dynamics/Simulação de Fluxos de Ar em Edificações, Dinâmica dos Fluidos Computacional

COB1435 ANÁLISE DINÂMICA DO COMPORTAMENTO INTEGRADO DE EDIFICAÇÕES E SISTEMAS DE CLIMATIZAÇÃO / INTEGRATED DYNAMIC ANALYSIS OF BUILDING AND AIR CONDITIONING UNITS

Jorge E. Corrêa (*), Cezar O. R. Negrão (**), Cláudio Melo (**)

(*) Universidade Federal do Pará / Centro Tecnológico / Depto. de Engenharia Mecânica

(**) Universidade Federal de Santa Catarina / Depto. de Engenharia Mecânica / NRVA

CEP 88040-900 - Florianópolis - SC - E.mail: melo@nrva.ufsc.br

This work is concerned with the dynamic modeling of self-contained air conditioning units. Units with air-cooled and water-cooled condensers are modeled. The ESP-r (Environmental System Performance - research) code, when coupled with these models, becomes capable of modeling the energy and fluid flow within combined building and plant systems, under typical operational brazilian conditions.

Keywords: Simulação, Ar condicionado, Edificações, Energia / Simulation, Air-Conditioning, Buildings, Energy.

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