Teaching solar energy applications using in-house developed testbench

The demand for energy from fossil fuel continues to increase, especially in countries such as China and some developing countries. However, known reserves of fossil fuel continue to decrease with resultant increase in the unit cost of oil. This economic consideration, coupled with environmental degradation has spurred renewed interest in alternative energy resources, especially solar energy and photovoltaic technology and applications. The United States of America has established a national goal on the increased utilization and penetration of solar energy. A roadmap, published in January 2000 by a group of experts from the U.S. industry, sets very ambitious goals for the next twenty years. Specifically, the U.S. industry looks to install 6 gigawatt peak (GWp) worldwide, and to lower the cost to end users to $ 3 per watt AC in 2010 and approach $ 1.50 per watt AC in 2020. This requires the training of students to meet the envisaged workforce. A solar energy testbench has been developed in the Electrical Engineering Department of Tuskegee University to provide this needed training to students. This paper discusses the development of this testbench and the utilization of this testbench to illustrate the design concepts of adequacy, efficiency and optimal control of solar generated electric energy. Concepts developed using the testbench can be validated on the larger scale in the Tuskegee University solar house and renewable energy center. Design projects completed by students are discussed and the dual utilization of this testbench for training students also in power electronics discussed, including possible design projects. Finally, an envisaged expansion of the testbench is discussed and the additional advantages and utilization for teaching and research presented.