Design Considerations of a Solar Racing Boat: Propeller Design Parameters as a Result of PV System Power

Abstract

Abstract In order to optimize a PV-powered racing boat, we researched the relationship between the power generated with PV modules and the design of the propeller for the boat during a race. Research on solar-powered boats show optimization of sub-components, but do not consider the interaction of the complete set of components and the optimization thereof. We made a set of equations describing the energy generated while sailing a distance, and a model for a permanent magnet DC motor. Furthermore, we considered the power flows from PV module hull resistance in the water. Considering the available amount of power and the hull's resistance for various speeds, we were able to determine optimum efficiencies of the electrical engine to determine design parameters for the boat's propeller. We compared monitoring data from a race for PV-powered boats from 2012 with a similar race in 2014. As a result, we noticed an increase of 15% in efficiency. With these equations, we prove that considering the available amount of solar energy can help optimize the propulsion system for PV-powered boats.