| Full text | |
| Author(s): |
Ana C. S. de Araujo
[1]
;
José A. Frizzone
[2]
;
Antonio P. de Camargo
[3]
;
Diego J. de S. Pereira
[4]
;
Verônica G. M. L. de Melo
[5]
;
Wagner W. A. Bombardelli
[6]
Total Authors: 6
|
| Affiliation: | [1] Universidade de São Paulo. Escola Superior de Agricultura “Luiz de Queiroz” - Brasil
[2] Universidade de São Paulo. Escola Superior de Agricultura “Luiz de Queiroz” - Brasil
[3] Universidade Estadual de Campinas. Faculdade de Engenharia Agrícola - Brasil
[4] Universidade de São Paulo. Escola Superior de Agricultura “Luiz de Queiroz” - Brasil
[5] Universidade de São Paulo. Escola Superior de Agricultura “Luiz de Queiroz” - Brasil
[6] Universidade de São Paulo. Escola Superior de Agricultura “Luiz de Queiroz” - Brasil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Revista Brasileira de Engenharia Agrícola e Ambiental; v. 25, n. 1, p. 3-9, 2020-11-30. |
| Abstract | |
ABSTRACT The objective of this study was to quantify the effect of water temperature variations on the discharge of collapsible thin-walled drip tapes with integrated non-pressure-compensating emitters. The tests were conducted in the laboratory using an automated test bench. Tests were performed to determine the discharge-pressure curves by varying the water temperature from 20 to 50 °C. Nine emitter models of three wall thicknesses (6, 8, and 9 MIL) were evaluated. The coefficients K and x of the discharge-pressure curves varied according to the water temperature. In flat emitters of turbulent flow (x < 0.5), the discharge decreased as the temperature increased. In the welded emitters of turbulent flow, several responses were observed. Regarding emitter D (x > 0.5), the discharge increased as the temperature was increased, while for emitter C (x < 0.5), the discharge decreased; the highest discharge variations occurred at pressures higher than 60 kPa. For embossed emitters, the discharge increased as a function of temperature, however, the greatest variation occurred at the lowest pressures. None of the emitters showed significant difference in the discharge variation due to wall thicknesses. (AU) | |
| FAPESP's process: | 18/20099-5 - Clogging processes of irrigation drippers due to interactions of calcium carbonate and solid particles |
| Grantee: | Antonio Pires de Camargo |
| Support Opportunities: | Regular Research Grants |