Performance Indicators of Wind Energy Production February 16, 2015 Guglielmo D’Amico Dipartimento di Farmacia, Universit` a ‘G. D’Annunzio’ di Chieti-Pescara, 66013 Chieti, Italy Filippo Petroni 1 Dipartimento di Scienze Economiche ed Aziendali, Universit` a degli studi di Cagliari, 09123 Cagliari, Italy Flavio Prattico Dipartimento di Ingegneria Industriale e dell’Informazione e di Economia, Universit` a degli studi dell’Aquila, 67100 L’Aquila, Italy Abstract Modeling wind speed is one of the key element when dealing with the production of energy through wind turbines. A good model can be used for forecasting, site evaluation, turbines design and many other purposes. In this work we are interested in the analysis of the future fi- nancial cash flows generated by selling the electrical energy produced. We apply an indexed semi-Markov model of wind speed that has been shown, in previous investigation, to reproduce accurately the statisti- cal behavior of wind speed. The model is applied to the evaluation of financial indicators like the Internal Rate of Return, semi-Elasticity 1 Corresponding Author. Email address: fpetroni@unica.it 1 arXiv:1502.03205v1 [physics.data-an] 11 Feb 2015