An Algorithm for the Design of a Stand-Alone Hybrid System

Abstract

According to the report provided by REN 21 (Renewable Energy Network for the 21st Century), over 73.8% of the amount of energy produced in Europe comes from non-renewable energy sources. However, the energy produced by fossil sources leads to an increase in the greenhouse gases emissions and to global warming. To reduce these effects, more and more countries have decided to increase the use of renewable energy sources. Sun, wind, water, biomass and geothermal energies are the main sources of renewable energy, but part of them are unpredictable and are not available all the time. Therefore, to meet the required energy, the hybrid systems, based on a combination of renewable energies, are preferred. These systems are often used in remote areas, but, due to the variability of the renewable sources, their design and analysis is difficult to be performed. An algorithm for the selection and design of a hybrid energy system based on solar, wind and/or hydro energy is presented in this paper depending on the renewable resources onsite available. The algorithm is applied to a case study that enables to select the appropriate hybrid system that provides the required energy for a guesthouse located in a remote area. Conclusions and recommendations are formulated on the design of hybrid systems.