Impact of water temperature and structural parameters on the hydraulic labyrinth-channel emitter performance
The effects of water temperature and structural parameters of a labyrinth emitter on drip irrigation hydraulic performance were investigated. The inside structural parameters of the trapezoidal labyrinth emitter include path width (W) and length (L), trapezoidal unit numbers (N), height (H), and spacing (S). Laboratory experiments were conducted using five different types of labyrinth-channel emitters (three non-pressure compensating and two pressure-compensating emitters) commonly used for subsurface drip irrigation systems. The water temperature effect on the hydraulic characteristics at various operating pressures was recorded and a comparison was made to identify the most effective structural parameter on emitter performance. The pressure compensating emitter flow exponent (x) average was 0.014, while non-pressure compensating emitter’s values average was 0.456, indicating that the sensitivity of non-pressure compensating emitters to pressure variation is an obvious characteristic (p<0.001) of this type of emitters. The effects of water temperature on emitter flow rate were insignificant (p>0.05) at various operating pressures, where the flow rate index values for emitters were around one. The effects of water temperature on manufacturer’s coefficient of variation (CV) values for all emitters were insignificant (p>0.05). The CV values of the non-pressure compensating emitters were lower than those of pressure compensating emitters. This is typical for most compensating models because they are manufactured with more elements than non-compensating emitters are. The results of regression analysis indicate that N and H are the essential factors (p<0.001) to affect the hydraulic performance.
Al-Amoud AI, 1995. Significance of energy losses due to emitter connections in trickle irrigation lines. J Agric Eng Res 60: 1-5. http://dx.doi.org/10.1006/jaer.1995.1090
Al-Amoud AI, Al-Saud MI, 2005. Effect of temperature on hydraulic characteristics of emitters. King Saud University Journal, Agricultural Sciences 18(1): 47-74.
ASABE, 2005. EP-458: Field evaluation of microirrigation systems. ASABE, St. Joseph, USA.
Ayars JE, Phene CJ, Hutmacher RB, Davis KR, Schoneman RA, Vail SS, Mead RM, 1999. Subsurface drip irrigation of row crops: A review of 15 years of research at the Water Management Research Laboratory. Agric Water Manage 42: 1-27. http://dx.doi.org/10.1016/S0378-3774(99)00025-6
Batchelor CH, Lovell CJ, Murata M, 1996. Simple microirrigation techniques for improving irrigation efficiency on vegetable gardens. Agric Water Manage 32: 37-48. http://dx.doi.org/10.1016/S0378-3774(96)01257-7
Bhatnagar PR, Srivastava RC, 2003. Gravity-fed drip irrigation system for hilly terraces of the northwest Himalayas. Irrig Sci 21: 151-157.
Bralts VF, Wu IP, Gitlin HM, 1981. Manufacturing variation and drip irrigation uniformity. T ASABE 24(1): 113-119. http://dx.doi.org/10.13031/2013.34209
Clark GA, Lamm FL, Rogers DH, 2005. Sensitivity of thin-walled drip tape emitter discharge to water temperature. Appl Eng Agric 21(5): 855-863. http://dx.doi.org/10.13031/2013.19713
Cook FJ, Thorburn PJ, Fitch P, Bristow KL, 2003. Wet up: A software tool to display approximate wetting patterns from drippers. Irrig Sci 22(3-4): 129-134. http://dx.doi.org/10.1007/s00271-003-0078-2
Decroix M, Malaval A, 1985. Laboratory evaluation of trickle irrigation equipment for field. Proc 3rd Int Drip/Trickle Irrig Cong, California, USA. Vol 1, pp: 325-338.
Dogan E, Kirnak H, 2010. Water temperature and system pressure effect on drip lateral properties. Irrig Sci 28: 407-419. http://dx.doi.org/10.1007/s00271-009-0202-z
Evans RG, Wu I, Smajstrala AG, 2007. Microirrigation systems, Chapter 17. Design and operation of irrigation systems, 2nd edition. Am Soc Agr Biol Eng Spec Monog, pp: 632-683.
Griffiths BAK, Lecler NL, 2001. Irrigation system evaluation. Procedures of the South African Sugar Technologists Association 75: 58-67.
Hezarjaribi A, Dehghani AA, Meftah Helghi M, Kiani A, 2008. Hydraulic performance of various trickle irrigation emitters. J Agron 7(3): 265-271. http://dx.doi.org/10.3923/ja.2008.265.271
Kang S, Yulong Z, Zhuangde J, 2003. Laser profilometer. Opt Precis Eng 11(3): 245-248.
Karmeli D, Keller J, 1975. Trickle irrigation design. Rain Bird Sprinkler Manuf. Corp., Glendora. 133 pp.
Keller J, Karmeli D, 1974. Trickle irrigation design parameters. T ASABE 17(4): 678-684. http://dx.doi.org/10.13031/2013.36936
Madramootoo CA, Khatri KC, Rigby M, 1988. Hydraulic performances of five different trickle irrigation emitters. Can Agr Eng 30: 1-4.
Mizyed N, Kruse EG, 1989. Emitter discharge evaluation of subsurface trickle irrigation. T ASABE 32: 1223-1228. http://dx.doi.org/10.13031/2013.31138
Nakayama FS, Bucks DA, 1986. Trickle irrigation for crop production, Elsevier Sci, Amsterdam, pp: 1-383.
Özekici B, Sneed RE, 1995. Manufacturing variation for various trickle irrigation on-line emitter. Appl Eng Agric 11(2): 235-240. http://dx.doi.org/10.13031/2013.25734
Özekici B, Bozkurt S, 1999. Determination of hydraulic performances of in-line emitters. Tr J Agr Forest 23: 19-24.
Qingsong W, Gang L, Li W, Jincan Z, Jie L, Yusheng S, 2010. Experimental study on the multisegment regime of water flow in drip emitters. J Irrig Drain Eng ASCE 136(4): 254-260. http://dx.doi.org/10.1061/(ASCE)IR.1943-4774.0000181
Rodriguez-Sinobas L, Juana L, Losada A, 1999. Effects of temperature changes on emitter discharge. J Irrig Drain Eng ASCE 125(2): 64-73. http://dx.doi.org/10.1061/(ASCE)0733-9437(1999)125:2(64)
Scaloppi EJ, Allen RG 1993. Hydraulics of irrigation laterals: comparative analysis. J Irrig Drain Eng ASCE 119(1): 91-115. http://dx.doi.org/10.1061/(ASCE)0733-9437(1993)119:1(91)
Von Bernuth, RD, Solomon KH, 1986. Design principles: emitter construction. In: Trickle irrigation for crop production (Nakayama FS & Bucks DA, eds.), Elsevier, Amsterdam, pp: 27-52. http://dx.doi.org/10.1016/B978-0-444-42615-4.50007-2
Wei Z, Tang Y, Zhao W, Lu B, 2007. Rapid structural design of drip irrigation emitters based on RP technology. Rapid Prototyping Journal 13(5): 268-275. http://dx.doi.org/10.1108/13552540710824760
Wei Z, Tang Y, Lu B, 2009. Two-phase flow analysis and experimental investigation of micro-PIV for emitter micro-channels. Proc. 7th Int Conf on CFD in the Minerals and Process Industries, CSIRO, Melbourne, Australia, 9-11 December.
Wu IP, Gitlin HM, 1975. Energy gradient line for drip irrigation laterals. J Irrig Drain Eng ASCE 101(4): 321-326.
Wu IP, Gitlin HM, 1983. Drip irrigation application efficiency and schedules. T ASABE 28: 92-99.
Zapata N, Nerilli E, Martinez-Cob A, Chalghaf I, Chalghaf B, Fliman D, Playan E, 2013. Limitations to adopting regulated deficit irrigation in stone fruit orchards: a case study. Span J Agric Res 11(2): 529-546. http://dx.doi.org/10.5424/sjar/2013112-2902
Zhang J, Zhao W, Tang Y, Lu B, 2011. Structural optimization of labyrinth-channel emitters based on hydraulic and anti-clogging performances. Irrig Sci 29: 351-357. http://dx.doi.org/10.1007/s00271-010-0242-4
Zhao W, Zhang J, Tang Y, Wei Z, Lu B, 2009. In: IFIP International Federation for Information Processing, vol. 294, Computer and Computing Technologies in Agriculture II (Li D & Cunjiang Z, eds), Springer, Boston, USA, pp: 881-890.
Zhiqin L, Lin L, 2011. The influence of the sectional form of labyrinth emitter on the hydraulic properties. AICI 2011, CCIS 237 (Deng H et al. eds), Berlin, Heidelberg: Springer-Verlag, pp: 499-505.
Zur B, Tal S, 1981. Emitter discharges sensitivity to pressure and temperature. J Irrig Drain Div ASCE 107: 1-9.
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