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Los edificios de viviendas son uno de los principales consumidores de energía debido a todos los aparatos eléctricos que tenemos instalados en casa. Ahora tenemos la oportunidad de convertir nuestras viviendas en pequeñas centrales generadoras de energía limpia y que ayuden a compensar el consumo.

Eso ya es posible, no solo por las excelentes condiciones climáticas de Barcelona, una ciudad con muchas horas de sol, sino también porque las tecnologías de las energías renovables son más eficientes y accesibles para los ciudadanos que nunca.

Barcelona tiene un enorme potencial energético. Por eso el Ayuntamiento impulsa el aprovechamiento de las azoteas de las viviendas como uno de los principales recursos autóctonos de la ciudad.

El sol, fuente de energía eléctrica

La energía solar fotovoltaica es la electricidad que se obtiene de la luz solar. Los rayos de sol inciden sobre los paneles o placas solares formados por la unión de pequeñas células de silicio capaces de captar la radiación solar y transformarla en electricidad.

La energía solar fotovoltaica que se genera en las azoteas de Barcelona puede verterse en la red eléctrica o bien autoconsumirse instantáneamente con el fin de rebajar el consumo de energía de la red convencional.

Los componentes principales de un sistema de energía fotovoltaica son los siguientes:

  • Las placas: Están formadas por células fotovoltaicas que captan la radiación solar y la transforman en electricidad en corriente continua.
  • El inversor: Es el encargado de transformar la corriente continua (de 12, 24 o 48 V) generada por la instalación fotovoltaica en corriente alterna (220 o 230 V), que es la que utilizan la red eléctrica convencional y la mayoría de aparatos eléctricos de uso habitual.

 

Otros sistemas de energía renovable para viviendas

Solar térmica. Es la energía que se obtiene directamente al aprovechar el calor de los rayos de sol para calentar otro fluido. Se basa en unos captadores o placas solares donde inciden los rayos, y el calor recogido se utiliza para producir agua caliente sanitaria.

Minieólica. Es la que aprovecha la energía cinética del viento para convertirla en energía eléctrica o mecánica. Se genera a partir del movimiento de los aerogeneradores por efecto del viento.