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PVT increasingly used for net zero energy buildings

Submitted by Baerbel Epp on May 31, 2018
Photo: ISFH, IEA SHC Task 60A rising number of manufacturers and suppliers in Europe are offering combined photovoltaic and solar thermal systems, also known as PVT units. This was one of the main messages of the International Workshop on the Status of PVT Systems, organised by Fraunhofer ISE on 16 May 2018 in Freiburg. The event, held as part of IEA SHC Task 60, Application of PVT Collectors and New Solutions in HVAC Systems, featured 15 speakers, who updated 63 attendees working in industry and science on the progress made with PVT products and research.
Photo: ISFH, IEA SHC Task 60

Switzerland: PVT System Output Reaches 330 kWhth/m² on Top of 163 kWhel/m²

Submitted by Baerbel Epp on July 29, 2016
PVT OberfeldCrystalline PV modules utilise only 12 to 15 % of the incoming sunlight, while the rest is usually treated as waste heat. Hybrid solar panels, also called PVT elements, will channel this unused low-temperature heat, as shown by a large-scale demonstration plant in Switzerland. The PVT system’s 1,300 m² are used to regenerate a borehole field in a Swiss multi-family housing area. Monitoring data of the system’s first year in operation between August 2014 and July 2015 resulted in an annual thermal yield of 330 kWh/m² in addition to the 163 kWh/m² of electricity produced by the PV modules, according to a statement made by researchers from the Swiss SPF – Institute of Solar Technology earlier this year. The borehole field serves as the energy source for the heat pumps, which supply hot water all-the-year and space heating in winter. Most probably, the recommendations that the SPF researchers made to optimise the system in a paper published in May 2016 will even lead to a higher thermal yield during the installation’s second year. 
Photo: SPF Rapperswil
 

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