Nozzle classification system in Japan based on the relative spray ...

TABLE 1: Overview of the <strong>in</strong>vestigated nozzle-pressure comb<strong>in</strong>ation and the environment
parameters <strong>in</strong> the drift experiment
<strong>Nozzle</strong> <strong>in</strong>formation Environment parameters [3]
Notation [1] Flow rate [2] ,
L m<strong>in</strong> -1
Pressure,
MPa
Air
temperature,
℃
Water
temperature,
℃
Relative
humidity,
%
HS03-0.30 1.20 0.30 22.4 20.6 57.3
ES05-1.00 0.35 1.00 23.7 21.6 50.7
ES05-1.50 0.43 1.50 27.0 22.8 46.7
ES06-1.00 0.51 1.00 25.4 22.0 53.3
ES06-1.50 0.62 1.50 25.6 22.2 43.7
ES07-1.00 0.68 1.00 27.0 22.8 37.7
ES07-1.50 0.83 1.50 21.8 20.7 78.0
ES08-1.00 0.90 1.00 22.2 20.7 71.7
ES08-1.50 1.10 1.50 26.5 22.0 42.7
ES09-1.00 1.13 1.00 25.8 21.2 45.3
ES09-1.50 1.39 1.50 23.1 31.7 42.5
ES10-1.00 1.41 1.00 24.3 21.0 49.0
ES10-1.50 1.73 1.50 17.5 17.6 66.7
ES11-1.00 1.69 1.00 17.4 17.5 70.3
ES11-1.50 2.07 1.50 22.0 19.3 60.0
[1]
HS03, Hypro ISO F 110 03 standard flat fan nozzle; ES, YAMAHO KIRINASHI ES nozzle; [2] The flow
rate data were cited from manufacturer data; [3] The values of the environment parameters were
obta<strong>in</strong>ed by averag<strong>in</strong>g the value of three repetitions.
2.2 Index calculation and nozzle drift <strong>classification</strong>
In this study, the DIXRP value was calculated to estimate the drift reduction performance of
the <strong>in</strong>vestigated nozzle-pressure comb<strong>in</strong>ations (Herbst, 2001). In the calculation process, the
nozzle heights were 0.5m for the reference spray while the nozzle heights were 0.4m and
0.3m for the ES series nozzles <strong>based</strong> on the manufacturer recommendation. The details of
the calculation equations could be found <strong>in</strong> the above reference. The virtual floors (h=0m) <strong>in</strong>
the <strong>in</strong>dex calculation were assumed to be 0.6m, 0.7m and 0.8m above the floor of the w<strong>in</strong>d
tunnel correspond<strong>in</strong>g to the three nozzle heights, respectively. Thus, the nozzle heights which
equal the vertical distance between the nozzle and the lowest collector l<strong>in</strong>e were 0.5m, 0.4m
and 0.3m. The nozzle drift <strong>classification</strong> for the nozzle-pressure comb<strong>in</strong>ations <strong>in</strong>vestigated
was carried out follow<strong>in</strong>g the methods adopted by German Federal Biological Research
Centre for Agriculture and Forestry Braunschweig (BBA) (Herbst, 2001).