| Author | Dante, Edgar Trinidad |
| Call Number | AIT Thesis no.AE-90-08 |
| Subject(s) | Spraying equipment
|
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Laboratory and field tests were conducted to determine the spray
distribution pattern and deposition characteristics of charged spray from an
electrostatic spinning disc sprayer. Spray distribution pattern was determined
using a laboratory spray patternator. A standard fluorometric analysis quantified
the amount of fluorescent material deposited on the target. Six-level artificial
plants and soybean plants were used as targets in t he laboratory and field tests,
respectively.
Low s peed (2000 rpm) spray pattern had a saddle-shaped curve with a hump
near the center. At 3000 to 5000 rpm, t he spray pattern assumed a bell-shaped
curve. The spray pattern uniformity improved while tilting the disc at 30°
backward and utilizing two liquid feed tubes positioned 180° apart.
In the laboratory tests, t he deposition efficiency of uncharged spray was
between 32% to 53% . Optimum electrode voltage was found at 2.5 kV where the
deposition efficiency of charged spray was between 55% to 94%, giving relative ·increases of between 1. 6- to 2. 0-fold over uncharged spray. Deposition efficiency
improved as disc speed increased and deteriorated as flowrate increased. Multilevel deposition analysis showed between 2- to 6-fold relative increases in
deposition due to charging at the intermediate and lower levels of the target and
between 1.1- to 1.7-fold improvement on the top levels. Underside surface
deposition accounted only between 4% to 10% of the total deposition. |
| Year | 1990 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Gupta, Chandra P.; |
| Examination Committee(s) | Singh, Gajendra ;Gee-Clough, D. ;Salokhe, Vilas M; |
| Scholarship Donor(s) | Netherlands Government; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |