Methodologies for the simulation and verification of the hydraulic operation of cold water building systems according to the guidelines of NBR 5626/2020

Authors

DOI:

https://doi.org/10.20873/2024_jul_13066

Abstract

The Brazilian standard ABNT NBR 5626:2020 presented the possibility of  methodologies development for the design potable-water supply systems of buildings, excluding the old calculation script (Maximum Probable Consumption method), indicating that the designer must estimate the pressure in the fixtures using flow vs. pressure performance equations, in addition to not allowing a pressure reduction of more than 10% for showers operating at the same time with other appliance, in relation to its design pressure. Thus, two methodologies were developed to verify the hydraulic operation of potable-water plumbing systems. The first had the Bernoulli Equation as a precept, in two ways: not considering the influence of the sub-branches (Approach 1A) and taking them into account (Approach 1B). In the second, a permissible variation in the pressure in the shower is defined, at the designer's discretion, checking the hydraulic operation with developed inequations, ensuring greater flexibility to the designer during the design. The developed methodologies were adapted to the design guidelines of potable-water hydraulic systems for buildings and facilitated the design process, as they already enable the simulation and verification of the system's hydraulic operation. For the first methodology the simplification advantage does not surpass the precision loss.

Published

2024-07-30

How to Cite

Silveira Thebaldi, M., Tavares Assunção, C., Zanotto Baratti, L., Alexandre da Silva, M., & Neves Merlo, M. (2024). Methodologies for the simulation and verification of the hydraulic operation of cold water building systems according to the guidelines of NBR 5626/2020. DESAFIOS - Revista Interdisciplinar Da Universidade Federal Do Tocantins, 11(5). https://doi.org/10.20873/2024_jul_13066

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