145 Ritesh Chavan , Amir Hussain, Sanika Mahadeokar, Swapnil Nichat, Deepak Devasagayam International Journal of Innovations & Advancement in Computer Science IJIACS ISSN 2347 – 8616 Volume 4, Issue4 April 2015 Design and Construction of Solar Powered Agricultural Pesticide Sprayer Ritesh Chavan #1 , Amir Hussain #2 , Sanika Mahadeokar #3 , Swapnil Nichat #4 , Deepak Devasagayam *5 # B.E., * Assistant Professor, Department of Mechanical Engineering Fr. C. Rodrigues Institute of Technology, Vashi, Navi Mumbai 400 703, India Abstract— Today’s world faces a huge “energy crisis” problem. To meet the future “energy demands”, the use of non-conventional energy as an alternate solution is inescapable. In order to meet the food requirements of growing population, modernization of agriculture has become a necessity. In agriculture, spraying of pesticides is an important task to protect the crops from insects for obtaining high yield. However, farmers have been mainly using traditional conventional techniques like hand operated and fuel operated spray pump system for spraying pesticides. Now-a-days, the concept and technology employing non-conventional energy has become very popular for all the developing activities. With this motivation, we have developed a solar powered agricultural pesticide sprayer prototype. The prototype was design considering parameters like desired spraying efficiency, low weight, low cost, user- friendly nature, high operating time and for faster coverage of area. Thus, the prototype was design to be a value for money product in the agricultural sector. For designing the prototype, the conventional sprayer system was studied to understand the mechanism for spraying process. Mathematical equations were derived after adopting suitable assumptions for calculation of the area covered during spraying, nozzle dimensions, pressure head and power of the motor required for the spraying a known discharge of fluid. The parts required for the system were selected by solving for known inputs value, the derived equations through a java program and considering their availability in market. The prototype was fabricated and arrangements were made on the system to allow the user to carry it on its back while operation. Thus, the system was made portable. The prototype was fabricated according to the design parameters and field tested according to the standard conditions. Keywords- Diaphragm pump, Spraying time, Portable. I. INTRODUCTION Spraying of pesticides is an important task in agriculture for protecting the crops from insects. Farmers mainly use hand operated or fuel operated spray pump for this task. This conventional sprayer causes user fatigue due to excessive bulky and heavy construction. Fuel operated spray pump exhaust carbon dioxide as pollutant which has a detrimental effect on our environment. Hence, these conventional sprayers are not very efficient. This motivated us to design and fabricate a model that utilizes solar energy for spraying pesticides. In our design, the hand lever will be eliminated to reduce the user’s fatigue level. There will be elimination of engine of fuel operated spray pump by which there will be reduction in vibrations and noise. The elimination of fuel will make our spraying system eco-friendly. So with this background, we are trying to design and construct a solar powered spray pump system. II. LAYOUT OF THESYSTEM The first unit of proposed system is energy conversion unit. Solar energy obtained by the sun is converted into electrical energy using solar panel by photovoltaic effect. The output