MIE.38 – Smart Eco-friendly Consumer Lawn Irrigation Device Using Harvested Rainwater

• Gerda Andriuskevicius
• Kamile Dirzys
• Panos Malamis
• David Podstawski
• Ashley Roman

Sustainable management of water resources is of utmost importance in addressing the global challenges related to water scarcity and environmental conservation. This project aims to help manage water sustainability issues through a water collection system, which encompasses rainwater harvesting, water management, and the dispersion of water. Although similar technologies are available for purchase, such as The Oto or Rain Flo, both rely on a pre-existing grid. This project considers the integration of traditional and modern technologies, such as rainwater harvesting tanks and solar collectors. During the summer months, outdoor water usage is more prevalent since green lawns are highly desired. The issue is wasting water on one’s lawn, as it lowers the drinking water amount and makes people question sustainability. Collecting and using rainwater prevents people from using their household water. Based on the average rainfall from April to August in the Chicago-land area, it would take about one 55-gallon rain barrel three times a week to water a 0.32-acre lawn. By utilizing a rain barrel, there is less of an impact on the environment and homeowners can save money. When designing the rain barrel system and its components, there were a few designs proposed in terms of placement of all the electronics. The prototypes included electronics housed on top of the barrel under a cover or a separate housing box next to the barrel. The first design was more compact and mobile which aided in the decision. An all-inclusive design was desired, so the solar panel was designed to be attached to the top of the barrel instead of on the side of the house or fence. To achieve the desired result, simulations and experiments were performed. Electrical schematics were simulated and professionally drawn with software. Computer Aided Design (CAD) models were created of everything for measurements and to ensure proper fitment within the top of the barrel. Real time coding troubleshooting was done with the raspberry pi and other components to create a working system. The group also experimented with various production methods to create a mold for a fiberglass lid, and 3D printing was the best option for the size and shape desired. Finally, a Failure Mode Effective Analysis (FMEA) table was created to assess failure modes of the system’s design. The entire rainwater barrel and its components were used as the system and the FMEA were considered for the entire apparatus. The table helped lower the Risk Priority Number (RPN) for all failure modes. The customer requested a completely green and automated system that could water their lawn. A fully sustainable and automated watering system was developed that uses rainwater, solar power, and replaceable parts. The components were automated using a Raspberry Pi and Python so that the client does not need to manually turn it on. This system reduced water usage, was completely powered by the sun, and reduced waste by allowing individual parts to be replaced rather than discarding the entire system.