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Operational Characterization of Pressure Regulating Valves
The functionality of pressure regulating valves (PRVs) is important for proper uniformity and efficiency of irrigation during center pivot irrigation, especially when the center pivot operates on sloping terrain. In practice, the regulated pressure at the PRV outlet is slightly influenced by its inl...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6011070/ https://www.ncbi.nlm.nih.gov/pubmed/29977168 http://dx.doi.org/10.1155/2018/1213638 |
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author | Talamini Junior, M. V. de Araujo, A. C. S. de Camargo, A. P. Saretta, E. Frizzone, J. A. |
author_facet | Talamini Junior, M. V. de Araujo, A. C. S. de Camargo, A. P. Saretta, E. Frizzone, J. A. |
author_sort | Talamini Junior, M. V. |
collection | PubMed |
description | The functionality of pressure regulating valves (PRVs) is important for proper uniformity and efficiency of irrigation during center pivot irrigation, especially when the center pivot operates on sloping terrain. In practice, the regulated pressure at the PRV outlet is slightly influenced by its inlet pressure, the flow rate through it, and hysteresis effects. The objectives of this work were (a) to evaluate operational characteristics of PRVs based on requirements stated by ISO 10522 (1993) and (b) to model the regulated pressure as a function of inlet pressure and flow rate through the valve considering hysteresis. We carried out tests to evaluate regulation uniformity, regulation curve, hysteresis, and the regulated pressure as function of flow rate and inlet pressure. The following three models of PRVs were evaluated: 10 PSI, 15 PSI, and 20 PSI. For each model, three samples were tested under increasing and decreasing conditions of inlet pressure, within the range from 49.03 to 784.53 kPa, with increments of 49.03 kPa. In addition, flow rates were tested within the range of 0 and 4 m(3) h(−1). From the gathered data, models to predict outlet pressure as a function of inlet pressure and flow rate were fitted. |
format | Online Article Text |
id | pubmed-6011070 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Hindawi |
record_format | MEDLINE/PubMed |
spelling | pubmed-60110702018-07-05 Operational Characterization of Pressure Regulating Valves Talamini Junior, M. V. de Araujo, A. C. S. de Camargo, A. P. Saretta, E. Frizzone, J. A. ScientificWorldJournal Research Article The functionality of pressure regulating valves (PRVs) is important for proper uniformity and efficiency of irrigation during center pivot irrigation, especially when the center pivot operates on sloping terrain. In practice, the regulated pressure at the PRV outlet is slightly influenced by its inlet pressure, the flow rate through it, and hysteresis effects. The objectives of this work were (a) to evaluate operational characteristics of PRVs based on requirements stated by ISO 10522 (1993) and (b) to model the regulated pressure as a function of inlet pressure and flow rate through the valve considering hysteresis. We carried out tests to evaluate regulation uniformity, regulation curve, hysteresis, and the regulated pressure as function of flow rate and inlet pressure. The following three models of PRVs were evaluated: 10 PSI, 15 PSI, and 20 PSI. For each model, three samples were tested under increasing and decreasing conditions of inlet pressure, within the range from 49.03 to 784.53 kPa, with increments of 49.03 kPa. In addition, flow rates were tested within the range of 0 and 4 m(3) h(−1). From the gathered data, models to predict outlet pressure as a function of inlet pressure and flow rate were fitted. Hindawi 2018-06-06 /pmc/articles/PMC6011070/ /pubmed/29977168 http://dx.doi.org/10.1155/2018/1213638 Text en Copyright © 2018 M. V. Talamini Junior et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Talamini Junior, M. V. de Araujo, A. C. S. de Camargo, A. P. Saretta, E. Frizzone, J. A. Operational Characterization of Pressure Regulating Valves |
title | Operational Characterization of Pressure Regulating Valves |
title_full | Operational Characterization of Pressure Regulating Valves |
title_fullStr | Operational Characterization of Pressure Regulating Valves |
title_full_unstemmed | Operational Characterization of Pressure Regulating Valves |
title_short | Operational Characterization of Pressure Regulating Valves |
title_sort | operational characterization of pressure regulating valves |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6011070/ https://www.ncbi.nlm.nih.gov/pubmed/29977168 http://dx.doi.org/10.1155/2018/1213638 |
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