Dimensionamento de um sistema de climatização para sala de cirurgia

Abstract

This work presents the design of an operating room air conditioning system, using modularized air treatment units to obtain a cooling load necessary to maintain temperature, humidity, sanitary and pressure parameters stipulated by the technical standard, ABNT NBR 7256: 2005 . For this, the thermal load required to remove the amount of sensible and latent heat is removed from the enclosure. The Radiant Time Series (RTSM) method is used, with the aid of CypeCad Cypetherm® software. The determination of the air flow of the insufflation, return and outside air; it becomes essential for the dimensioning of the pipeline network; that adding the losses of loads in the diffusers, grilles and modules of the air treatment unit define the pressure provided by the ventilation module. In order to fit the present work, the recommendations of ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers), special air-curtain diffusers and perforated plate unidirectional, both from TROX® manufacturer were chosen for implementation in the system. From the graphs generated by the thermal load software, the analysis of the plots of the total heat gain is performed in order to determine the validity of the data obtained. With the use of the equal pressure drop method, the dimensions of the ducts are determined as well as the choice of the external grids and external air intakes, with the flow, pressure loss and noise data consulted in the manufacturers' manuals. Finally, the design of the installation is made, making the conditioning modules, diffusers and ducts compatible with the available architecture.