Eficiencia Energética: Centros Educativos, Culturales y Deportivos | Energy Efficiency: Educational, Cultural & Sports Centres www.futurenergyweb.es 72 FuturEnergy | Abril April 2016 Con rendimientos medios mensuales (COP) del orden de 9/12 (verano/invierno) y una producción de energía útil por kWh consumido 15 veces superior a una caldera de gas natural, el sistema SediREC es capaz de recuperar más del 200% de la energía requerida para calentamiento de renovación, desde temperatura de red hasta temperatura del vaso. Gracias a ello, SediREC es capaz de calentar el agua de renovación captada de la red a 12-14 ºC hasta los 36-38 ºC a partir del agua extraída de la piscina a 27-28 ºC para renovación, logrando un coste energético mínimo en la renovación del agua y una rápida recuperación de la inversión. SediREC permite obtener unos ahorros mensuales importantes y es susceptible de recibir subvenciones en eficiencia energética y como energía renovable. Adicionalmente, como “sub-producto”, SediREC entrega el agua de renovación extraída de la piscina a una temperatura media anual que puede oscilar entre 4 ºC y 7 ºC. Esta energía de enfriamiento puede ser almacenada y utilizada posteriormente a coste mínimo en aplicaciones de vasos de contraste muscular o climatización. En la imagen 2 vemos que el SediREC de Altzate se ha ubicado dentro de una caseta metálica. En condiciones normales y para la required to heat up the renovation water, from the grid temperature to the pool temperature. As such, SediREC is able to heat the renovation water collected from the grid at 12-14ºC to 36-38ºC on the basis of the water taken from the pool at 27-28ºC for renovation, achieving a minimal energy cost for water renovation and a fast return on investment. SediREC can achieve significant monthly savings and is also eligible for energy efficiency subsidies and as a renewable energy. In addition, as a “by-product”, SediREC supplies the renovation water taken from the swimming pool at an average annual temperature that can fluctuate between 4ºC and 7ºC. This cooling energy can be stored and subsequently used at minimum cost in applications for the hydrotherapy pools or for temperature control. Image 2 shows how the SediREC unit at Altzate has been housed inside a metal hut. Under normal conditions and for the majority of swimming pools, it is easily installed inside the plant room along with the buffer tanks, the circulation pumps and the filters. SediREC can fully automate the daily management of renewing the swimming pool water, constantly measure and record all relevant values regarding volume, energy, temperatures, instantaneous outputs, instantaneous efficiency and average daily efficiency levels. The whole process can be remotely controlled via Internet. SediREC installation: operation and flows of water and energy Table 2 provides an analysis of the operating situation of the swimming pools in May 2014 following installation of the fully operational SediREC system at the facility. Image 3 shows a general layout of the SediREC connection at the Altzate swimming pool, as well as the usual average working values for managing both the large and small pools in terms of water flow, temperatures and instantaneous consumed and recovered outputs. Under average working conditions in May 2014, SediREC was able to achieve a COP efficiency of more than 11 for the large pool and 12 for the small pool. The system works with a constant output flow for drainage of 1,900 l/h and a variable input flow from the grid that is always higher than the output flow. The difference between Imagen 1. Balance diario de flujos aproximados de agua y energía en los vasos antes de la instalación del SediREC (Mayo 2013) Image 1. Daily balance sheet of approximate flows of water and energy into the pools prior to installing SediREC (May 2013) Equipo SediREC 1.9/122 instalado en Lezo SediREC 1.9/122 unit installed at Lezo Imagen 2. Ubicación del SediREC en las piscinas Altzate, Lezo. | Image 2. Location of the SediREC at the Altzate swimming pools, Lezo.
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