Adequabilidade do Método do Consumo Máximo Provável para o dimensionamento de sistemas prediais de água fria

Abstract

The Maximum Probable Consumption Method is commonly used for designing building potable water supply installations by probabilistic coefficients to estimate the probable flow in the system sections depending on the devices that are supplied by each node, was recommended by ABNT NBR 5626:1998 but no longer by its new edition, from 2020. However, according to that standard, probabilistic methods can still be used since the system design respects the established hydraulic operation guidelines. Thus, the objective was to analyze the hydraulic performance of a building potable water supply system, to verify the suitability of the Maximum Probable Consumption design method to the new design and hydraulic performance parameters determined in ANBT NBR 5626:2020, specifically concerning the minimum pressures and the variation of the dynamic pressure in the showers in isolated operation condition and due to simultaneous operation with different devices. The dynamic pressure head reduction limit, recommended by the standard new edition was exceeded only for two of the five combinations in one of the two analyzed bathrooms in this study, however when considering the design flow as only the shower flow. Thus, for the studied building, a typical single-family with only one floor, the Maximum Probable Consumption Method could be used, with the proviso that only the dynamic pressure head in the most unfavorable points of the building were verified.