Developing a PDA Head–Outflow Relationship from a Microscale Analysis
Pressure-driven analysis (PDA) frequently is adopted for water distribution system hydraulic simulation under pressure deficient conditions. Wagner’s equation is the most used head–outflow relationship (HOR) to represent the supply rate as a function of the available pressure. PDA simplifies the mul...
| Autores: | , , |
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| Formato: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Recursos: | Universidad de Castilla-La Mancha |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/32805 |
| Acesso em linha: | https://doi.org/10.1061/JWRMD5.WRENG-6314 http://hdl.handle.net/10578/32805 |
| Access Level: | acceso abierto |
| Palavra-chave: | Premise plumbing Pressure-driven Demand-driven |
| Resumo: | Pressure-driven analysis (PDA) frequently is adopted for water distribution system hydraulic simulation under pressure deficient conditions. Wagner’s equation is the most used head–outflow relationship (HOR) to represent the supply rate as a function of the available pressure. PDA simplifies the multiple outflow fixtures for spatially distributed customers represented by a node as a single orifice. It also assumes that all demands are flowrate based, neglecting the volumetric limits. This work demonstrates a methodology for developing HOR functions by building nodal demands from a microscale fixture by fixture analysis and determining actual supply at the hydraulic model node according to the responses in a small neighborhood of homes. Results are shown for a base case and for sensitivity tests of the number of homes, the value of the emitter coefficients, and human factors. Additional research is needed to precisely simulate fixture relationships and human responses at the household level and to identify the applicable range of pressures under which a PDA is necessary. |
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