(Dutch language video)
In our view, photovoltaic thermal hybrid solar collectors (PVT) are one of the most underestimated renewable energy harvesting solutions in places where space is rare and expensive. Think countries like the Netherlands. In a solar panel, a typical 20% of the solar radiation is transformed into electricity. In an isolated black flat plate solar thermal collector, the absorption rate is near 100%. In oractive typical values are: 250 kW electricity plus 400 kW heat, and operating with 80% overall conversion efficiency. In a hybrid PVT-panel/collector the photo-electric and thermal functions are combined in one. In the examples presented here, the thermal collector functions as the source for a heat pump. This is an alternative to more conventional solutions as extracting heat from a much colder source like 10 Celsius soil. The roof rather than the garden, so to speak.
In the Netherlands it is no longer allowed by law to build new homes with a natural gas connection; hence tens of thousands of new homes every year come with a heat pump installed. The battle for the most advantageous heat source for the heat pump has been ignited: soil, air or PVT-roof. May the best solution win.
[wikipedia.org] – Photovoltaic thermal hybrid solar collector
[Google Maps] – Waalre
[volthera.nl] – Volthera hybrid solar collector
[nl.wikipedia.org] – Warmtepomppaneel
[triplesolar.eu] – Triple Solar PVT Heat Pump Panel
[installatie.nl] – PVT: het dak als warmtepompbron
A similar example in Schildwolde, Groningen