000153078 001__ 153078 000153078 005__ 20251017144554.0 000153078 0247_ $$2doi$$a10.1002/we.2450 000153078 0248_ $$2sideral$$a116910 000153078 037__ $$aART-2020-116910 000153078 041__ $$aeng 000153078 100__ $$aLacal-Arántegui, Roberto 000153078 245__ $$aTechnology effects in repowering wind turbines 000153078 260__ $$c2020 000153078 5060_ $$aAccess copy available to the general public$$fUnrestricted 000153078 5203_ $$aThis research investigates, analyses, and quantifies the technological effects of wind turbine repowering (ie, where old turbines are removed and new turbines are installed at the same or a very close location, including the enhanced performance in energy production). In these cases, it is assumed that both old and new turbines are subject to the same wind regime, other than because of technological elements, such as hub height, and thus it is possible to isolate the effects of new technology from the effect of changing local wind conditions. This research is based on the analysis of empirical data on repowering turbines in Denmark and Germany, and on historical production data available for the Danish component of the data set. Technological innovations are expected to enable new wind turbines to capture more energy at the repowering site, mostly through larger rotors and higher hub heights, and this is what this study has analysed. The results show that new turbines in repowering projects are twice as high, have three times the rotor diameter, nine times the swept area, six times the nominal power, and nine times as much electricity as the old turbines. However, the most significant improvement is probably the increase of capacity factor of 7.1% on a per-turbine basis, or 9.7% on a per-production basis. 000153078 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es 000153078 590__ $$a2.73$$b2020 000153078 591__ $$aENGINEERING, MECHANICAL$$b54 / 133 = 0.406$$c2020$$dQ2$$eT2 000153078 591__ $$aENERGY & FUELS$$b78 / 114 = 0.684$$c2020$$dQ3$$eT3 000153078 592__ $$a0.742$$b2020 000153078 593__ $$aRenewable Energy, Sustainability and the Environment$$c2020$$dQ2 000153078 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000153078 700__ $$aUihlein, Andreas 000153078 700__ $$0(orcid)0000-0003-3174-9703$$aYusta, José María$$uUniversidad de Zaragoza 000153078 7102_ $$15009$$2535$$aUniversidad de Zaragoza$$bDpto. Ingeniería Eléctrica$$cÁrea Ingeniería Eléctrica 000153078 773__ $$g23, 3 (2020), 660-675$$pWind energ.$$tWIND ENERGY$$x1095-4244 000153078 85641 $$uhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85076726403&doi=10.1002%2fwe.2450&partnerID=40&md5=a8f6f2bbab38db5ef04e567cfa705b27$$zTexto completo de la revista 000153078 8564_ $$s4168523$$uhttps://zaguan.unizar.es/record/153078/files/texto_completo.pdf$$yVersión publicada 000153078 8564_ $$s1912934$$uhttps://zaguan.unizar.es/record/153078/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000153078 909CO $$ooai:zaguan.unizar.es:153078$$particulos$$pdriver 000153078 951__ $$a2025-10-17-14:12:44 000153078 980__ $$aARTICLE