#24#23, todo lo que quieras, pero lo que de verdad importa es que al final de su vida útil hayan generado más energía que la que se invirtió en su construcción y mantenimiento, y varios estudios demuestran que la TRE de la fotovoltaica es positiva, y en general, bastante alta:
Life-cycle analyses show that the energy intensity of typical solar photovoltaic technologies is rapidly evolving. In 2000 the energy payback time was estimated as 8 to 11 years[80], but more recent studies suggest that technological progress has reduced this to 1.5 to 3.5 years for crystalline silicon PV systems [79].
Thin film technologies now have energy pay-back times in the range of 1-1.5 years (S.Europe).[79] With lifetimes of such systems of at least 30 years, the EROEI is in the range of 10 to 30. They thus generate enough energy over their lifetimes to reproduce themselves many times (6-31 reproductions, the EROEI is a bit lower) depending on what type of material, balance of system (or BOS), and the geographic location of the system.[81]
Básicamente, que la fotovoltaica que se está fabricando actualmente tiene una TRE de entre 8,5 y 30. Para comparar, la TRE del petróleo actualmente anda sobre 7.
en.wikipedia.org/wiki/Photovoltaics#Energy_payback_time_and_energy_ret
Life-cycle analyses show that the energy intensity of typical solar photovoltaic technologies is rapidly evolving. In 2000 the energy payback time was estimated as 8 to 11 years[80], but more recent studies suggest that technological progress has reduced this to 1.5 to 3.5 years for crystalline silicon PV systems [79].
Thin film technologies now have energy pay-back times in the range of 1-1.5 years (S.Europe).[79] With lifetimes of such systems of at least 30 years, the EROEI is in the range of 10 to 30. They thus generate enough energy over their lifetimes to reproduce themselves many times (6-31 reproductions, the EROEI is a bit lower) depending on what type of material, balance of system (or BOS), and the geographic location of the system.[81]
Básicamente, que la fotovoltaica que se está fabricando actualmente tiene una TRE de entre 8,5 y 30. Para comparar, la TRE del petróleo actualmente anda sobre 7.