The automatic selection of hydraulic spray nozzles based on the psychrometric air conditions in hydropneumatic sprayers

• Published in: Revista Ceres Vol. 67; no. 1; pp. 9 - 15
• Main Authors: Sasaki, Robson Shigueaki, Brito, Ana Cláudia de, Alvarenga, Cleyton Batista de, Teixeira, Mauri Martins, Rocha, Helton John Alves
• Format: Journal Article
• Language: English
• Published: Vicosa Universidade Federal de Viçosa-UFV, Revista Ceres 01-02-2020; Universidade Federal de Viçosa; Universidade Federal De Viçosa
• Subjects: AGRICULTURE, MULTIDISCIPLINARY; Contamination; Control algorithms; Digital cameras; Droplets; droplets evaporation; droplets spectrum; Electronic systems; Evaporation; Humidity; Hydraulics; Laboratories; Nozzles; Response time; Sensors; Software; Spray nozzles; Spraying; Sprays; VPD; Water vapor; Brazil; droplets spectrum; droplets evaporation; VPD
• ISSN: 0034-737X; 2177-3491; 2177-3491
• DOI: 10.1590/0034-737x202067010002

According to Maciel et al. According to Queiroz & Reis (2015), it is essential conducting continuous studies about techniques capable of minimizing agricultural losses caused by water evaporation in hydraulic applications to help reducing costs and environmental contamination. [...]the aim of the current study was to develop an electronic system capable of automatically replacing hydraulic spray nozzles in hydropneumatic sprayers, based on the psychrometric air conditions at spraying time and evaluate the system developed for technical parameters and spray quality. [...]we set the water vapor saturation pressure deficit in the air (Equation 3). .. [...]the sprayer was left with two semi-arcs: one equipped with hydraulic nozzles presenting hollow-cone profile and medium-to-fine droplets (JA-2 model, Jacto®, Pompéia, SP, Brazil) and the other with air-induction hydraulic nozzles presenting hollow-cone profile and coarse to extremely coarse droplets (CVIA-015 model, MagnoJet®, Ibaiti, PR, Brazil) (Figure 2B).