Table 6. Relationships between overall efficiency and pressure head, discharge and
waste fuel in Hamedan province Pumping plant
station Equation
r
2
F Diesel and Electrical
OPE = 0.7696 × H + 0.5853 P ≤87.5
0.6870 88.253
OPE = 56.0 P= 87.5 Diesel
OPE = 0.4933 × Q - 0.4252 0.5680
6.574 Electrical
OPE = 1.2028 × Q + 18.209 0.3635
5.714 Diesel
WF = -0.3662 × OPE + 8.563 0.5885
7.149 Electrical
WF = -0.5845 × OPE + 39.241 0.7562
27.800 OPE = Overall energy efficiency; Q = Discharge L.s
-1
; H= Pressure Head m; WF= waste fuel kWh or L
Significant difference at 0.1 ; Significant difference at 1;
Significant difference at 5
3.2. Kerman
In Kerman studied 14 fields that all of them had electrical irrigation pumping plants. Overall energy efficiencies ranged from 25.3 to 92.2 that were 38 to 139 of NPPPC. Average of
overall energy efficiency in trickle and sprinkler was 55.4 84 NPPPC and 49.5 75 NPPPC respectively and average of both systems was 54.5 83 NPPPC.
Table 7. Statistical data from overall energy efficiency test in Kerman motor-powered
Amount of energy consumption relative to actual need was excess in 12 fields and total of excessive energy consumption was 313.7 Mw. Excessive energy consumption was 26.1 Mw
per year averagely in every irrigation pumping plants. Overall energy efficiency was directly correlated with excessive energy consumption Figure 3. For each percentage decreased in
overall energy efficiency, the average excessive energy consumption increased 0.39 kWh. Pressure
headm Discharge
L.s
-1
Power kW
Voltage V
Current Amp
cosΦ Input power
kW Overall
efficiency Excessive
fuelkWh Minimum
30.0 16.0
4.7 370.0
25.0 0.82
13.9 25.3
0.1 Maximum
47.0 53.0
21.8 370.0
88.0 0.89
50.2 92.2
17.6 Mean
36.7 32.0
11.8 370.0
41.8 0.85
22.9 54.5
7.0 Standard
deviation 5.4
10.8 5.0
0.0 16.7
0.02 9.6
19.7 5.8
CV 14.7
33.8 42.4
0.0 39.9
2.34 41.8
36.5 83.5
y = -0.3921x + 25.956 R
2
= 0.6963
2 4
6 8
10 12
14 16
18 20
20 30
40 50
60 70
Overall energy efficiency E
xcessi ve f
u el
kW h
Figure 3. Relationships between excessive fuel consumption and overall
energy efficiency in Kerman Average of electrical motors efficiencies in 7 fields that pumping plant did not connect directly
to the well was 86.9 that was higher than NPPPC 88. Average energy efficiency of 5 electrical motors was more than 90, and two electrical motors were 83.1 that were less
than NPPPC. These results showed main cause of low overall energy efficiency was low pump efficiency. Pump efficiency of 7 pumps averaged 50.8 that was less than attainable pumping
efficiency.
3.3. Khorasan Razavi
In Khorasan Razavi studied 13 fields that all of them had electrical irrigation pumping plants Table 8. Overall energy efficiency averaged 45.1 68 NPPPC and ranged from 36.4 to
63.1. Overall energy efficiency was less than NPPPC in all of investigated pumping plants. Excessive energy consumption was 9.5 kWh averagely in each irrigation pumping plants
Table 8.
Table 8. Statistical data from overall energy efficiency test in Khorasan razavi motor-powered
Overall energy efficiency was directly correlated with excessive energy consumption Figure 4. For each percentage decreased in overall energy efficiency, the average excessive energy
consumption increased 0.38 kWh. Pressure
headm Discharge
L.s
-1
Power kW
Voltage V
Current Amp
cosΦ Input power
kW Overall
efficiency Excessive
fuelkWh Minimum
22.0 8.0
3.4 340.0
13.0 0.82
7.3 36.4
1.6 Maximum
165.0 40.0
25.5 380.0
114.0 0.89
62.8 63.1
24.8 Mean
69.5 23.2
13.3 370.0
54.0 0.85
29.4 45.1
9.5 Standard
deviation 51.2
9.6 7.0
13.5 26.1
0.02 14.2
8.8 6.5
CV 73.7
41.6 52.8
3.7 48.4
1.98 48.3
19.6 68.3
y = -0.378x + 25.901 R
2
= 0.6142
2 4
6 8
10 12
14 16
18
30 35
40 45
50 55
60 65
Overall energy efficiency E
xcessi ve f
u el
kW h
Figure 4. Relationships between excessive fuel consumption and overall energy efficiency in
Khorasan Razavi Electrical motors efficiency in 3 fields that pumping plant did not directly connect to the well for 2
sprinkler irrigation and 1 trickle systems averaged 93.2 and 93.1 respectively that were higher than NPPPC 88. These results showed main cause of low overall energy efficiency was low
pump efficiency. The pumping efficiency of 2 sprinkler irrigation systems averaged 66.1 and for the 1 trickle irrigation system 41.4 that were less than attainable pumping efficiency.
3.4. Provinces technical results combined
