Journal of Agricultural Science and Technology
Journal of Agricultural Science and Technology
JAST
Agriculture
http://jast.modares.ac.ir
1
admin
1680-7073
2345-3737
10.22034/jast
en
jalali
1388
4
1
gregorian
2009
7
1
11
3
online
1
fulltext
en
Effect of Electrostatic Induction Parameters on Droplets
Charging for Agricultural Application
In this study, an electrostatic sprayer which had been previously designed and constructed was evaluated in order to quantify the charging of droplets. Liquid atomization was achieved by using an ultrasonic nozzle. The nozzle maximum flow rate was 25 milliliters per minute and vibration frequency was about 30 kHz. The induction method was used for charging the output droplets. All experiments were carried out within a closed environment with a fixed ambient humidity and temperature to reduce the effect of environmental factors. The independent parameters in this study included: voltage at four levels of 1.5, 3, 5 and 7 kV; air flow speed at six levels of 14, 14.9, 17, 20.2, 21.6 and 23 m s-1; charging electrode radius in two levels of 10 and 15 millimeters, horizontal distance between the electrode and nozzle tip at four levels of 1.5, 6, 10 and 15 millimeters; and liquid flow rate at three levels of 5, 12 and 25 milliliters per minutes. For evaluation of the system, the charging quantities of droplets were measured in different states. The maximum charging occurred at 5 ml min-1 flow rate, voltage of 7 kV, air flow speed of 23 m s-1 and the resulting current was 0.24 μA. On dividing the electrical current by the liquid flow rate and changing the scale, the mean charge to mass ratio was 1.032 μC g-1. Increasing voltage increased the charging quantity slightly but higher voltages and lower air speeds decreased it. The effect of the faster air speed on droplet charging phenomena is positive and the smaller electrode radius causes less charge induction on the droplets. The quantity of droplets charging first increased with increased distance between ring electrode and nozzle tip, and then it was either reduced and/or fixed.
Induction electrode,Charged liquid droplets,Charged spray,Electrostatic spraying
249
257
http://jast.modares.ac.ir/browse.php?a_code=A-10-1000-7304&slc_lang=en&sid=23
B.
Mostafaie Maynagh
B.
Mostafaie Maynagh
100319475328460045475
100319475328460045475
No
Mechanics of Agricultural Machinery Department, Tarbiat Modares University, Tehran, Islamic Republic
of Iran. Tel: 021-44196522
Mechanics of Agricultural Machinery Department, Tarbiat Modares University, Tehran, Islamic Republic
of Iran. Tel: 021-44196522
B.
Ghobadian
B.
Ghobadian
100319475328460046817
100319475328460046817
Yes
Mechanics of Agricultural Machinery Department, Tarbiat Modares University, Tehran, Islamic Republic
of Iran.
Mechanics of Agricultural Machinery Department, Tarbiat Modares University, Tehran, Islamic Republic
of Iran.
T.
Tavakkoli Hashjin
T.
Tavakkoli Hashjin
100319475328460045476
100319475328460045476
No
Mechanics of Agricultural Machinery Department, Tarbiat Modares University, Tehran, Islamic Republic
of Iran. Tel: 021-44196522
Mechanics of Agricultural Machinery Department, Tarbiat Modares University, Tehran, Islamic Republic
of Iran. Tel: 021-44196522
M. R.
Jahannama
M. R.
Jahannama
100319475328460045477
100319475328460045477
No
Engineering Research Institute of Jihad-e-Agriculture Ministry, Tehran, Islamic Republic of Iran.
Engineering Research Institute of Jihad-e-Agriculture Ministry, Tehran, Islamic Republic of Iran.