| Author(s) | Ahmed I. Al-Amoud and Mohammed I. Al-Saud |
| Affiliation | Agricultural Engineering Department, College of food and Agriculture Sciences, King Saud University, Riyadh |
| Title | Water Temperature Effects on Emitters Flow Rates |
| Source | Journal of King Saud University. Agricultural Sciences. Volume 18, No 1. (2006/1426) |
| Abstract | Theoretical functions were developed to verify the relations between emitters discharge rates and water temperature. The functions describe the relations in different flow patterns including turbulent, laminar and steady and unsteady state flow. To verify the relations and to study the performance of emitters, laboratory experiments were carried out at different water temperatures levels ranged between 20 and 80 úC. Results show effects of water temperature on emitter’s performance were varied. The discharge rates of laminar flow emitters and partially turbulent flow emitters increase with the increase of water temperature while the flow rates of unsteady flow emitters decrease with the increase of water’s temperature. The theoretical functions have comparable results with the laboratory study in the lower range of water temperatures, however; with the increase of water’s temperatures the results diverge. In general, theoretical predictions of flow rates for laminar flow emitters are higher than laboratory measured, while the flow rates of unsteady flow emitters are equivalent to the measured when water temperature less than 40 úC, However, the measured rates are higher than the predicted otherwise. |
