DETERMINATION OF THE EROI OF A WIND ENERGY CONVERSION SYSTEM
The Wind energy for electrical energy conversion has stood out in Brazil, the installed wind capacity in 2021, reached second place with a share of 11.8% (21.57 GW) in the Brazilian electricity matrix. In order to present itself as a viable energy source, wind energy studies are needed to assess the energy balance of the entire production chain. One of the main methods to verify what are the advantages of using a certain energy source, is by measuring the amount of energy generated in relation to the amount of energy used during the production process. Therefore this research aims to determine the Energy Return on Investment (EROI) of a theoretical wind farm located on the Northeast Brazilian coast, with twenty-five (25) 2 MW wind turbines. The process to be analyzed for the conversion of electrical energy through a wind farm is characterized by having four boundary conditions for the energy study, namely: 1 – Raw material processing stage, 2 – Wind turbine manufacturing stage, 3 – Wind turbine assembly stage, 4 – Operation and maintenance stage. The expected conclusions for this research are to obtain and to value the energy flow during the construction of a wind farm; as well as relating these results to the amount of energy used in all wind turbine construction processes alongside how much of this energy will represent at the end of the process. Meaning that, up to the delivery of this energy source to the distribution network. Having this information, it will make possible to learn the energy consumption, the energy efficiency in each activity, the global energy efficiency, and finally the EROI for that energy source.