Aplicação de famílias paramétricas para análise de perda de carga em redes de dutos AVAC

Abstract

The present work addresses a solution to the limitations of Autodesk Revit software regarding the automatic calculation of localized head loss in duct fittings. The main objective consists of developing a parametrization methodology applicable to the most varied families of singularities present in HVAC systems within a BIM environment, following ASHRAE and SMACNA standards. The adopted methodology involved the geometric modeling of critical singularities, such as elbows, transitions, and tees, combined with the structuring of experimental data into external Lookup Tables. Formulas with complex conditional logic were implemented within the families to correlate geometric and flow variables with the respective coefficients, allowing the software to make autonomous decisions on which table to consult. The tool validation occurred through a comparative case study between the analytical manual calculation and the automated calculation via BIM, using a reference duct system from technical literature. The results indicated high precision, with null relative errors in the selection of coefficients and negligible variations, in the order of thousandths of a percent, in dynamic pressure and total head loss values, attributed solely to computational rounding differences. It is concluded that the developed technological solution satisfactorily fills the software's functional gap, eliminates the need for manual consultations of standard tables, and provides greater agility and reliability to the engineering workflow in a BIM environment.