| Titles |
|
English :
|
Hydraluic properties of some poly-ethelene PROPERTIES OF laterals with built-in drippers
|
|
Arabic :
|
الخصائص الهيدرولية لبعض خطوط البولي ايثلين الفرعيه ذات النقاطات الداخلية
|
|
| Abstract |
A field study was conducted in Bustan area to determine the suitable length of PE pipes built-in drippers) with outer diameters of 15.6 mm, 16mm and 20 mm at 50 cm spacing between drippers. The average emitter discharges are ranged from 2.0 to 2.5 l/h at operating pressure 1.0 bar. Three random samples were tested according to the described methods in ISO 9260 (1991) and AEnRI Standard Coding: IR/DR/EM/TEST/ (2002). The tested samples were:
1- PE built-in dripper 15.6 mm/ 50 cm and nominal discharge 2.2 l/h.
2- PE built-in dripper with 16.0 mm /50cm and nominal discharge 2.2 l/h.
3- PE emitter built-in dripper 20/ 50cm and nominal discharge 2.5 l/h.
The results showed that:
1- In case of pipe 15.6/13.8 mm (O.D/ I.D.), the maximum length under test conditions was 140 m of pressure drop from 1.5 bar to 1.0 bar. The emitter showed a turbulent characteristic according to observed equation q = 2.5073 h0.5001. However, at conventional design condition of allowable pressure drop 10 % from inlet pressure of 1.0 bar , the suitable design length was 75 m with discharge drop 2.5 to 2.38 l/h.
2- In case of drip line emitters with O.D/ I.D 16/13.8 mm of fully self compensating, , the suitable design length reached to 140 m according to field data which showed an almost constant discharge of about 2.2 l/h at inlet pressure 1.0 bar according to observed equation q = 2.2 h0.0523.
3- In case of pipe 20.0 mm O.D. and 17.6 mm I.D the suitable length 160 m, at inlet operating pressure 1.5 bar decreased to 1.0 bar resulted with turbulent flow , q = 2.69457h0.4938 at the allowable variation of the pressure 10.0% from inlet pressure (1.0 bar) and discharge 5.0%. The discharge ranged between 2.70 l/h and 2.56 l/h for length 120 m.
|
| Publication year |
2005
|
| Availability location |
مكتبة كلية الزراعة جامعة الازهر
|
| Availability number |
|
| Organization Name |
Agricultural Engineering Research Institute (AENRI)
|
| City |
القاهرة
|
| serial title |
المجلة المصرية للبحوث الزراعية
|
| Department |
On farm irrigation and drainage
|
| Author(s) from ARC |
|
| External authors (outside ARC) |
محمد نبيل العوضي
أستاذ متفرغ الهندسة الزراعية كلية الزراعة جامعة عين شمس
السعيد محمد كمال
معهد بحوث الهندسة الزراعية
|
| Agris Categories |
Agricultural engineering
|
AGROVOC
TERMS |
Fluid mechanics.
|
| Proposed Agrovoc |
PE pipes;Built-in drippers;uniformity of driplines;
|
| Publication Type |
Journal
|