This Task is Complete
Welcome to the official website of IEA SHC
Task 35 "PV/Thermal Solar Systems" - a research work task initiated
January 1, 2005, as part of the International Energy Agency (IEA) Solar Heating
and Cooling (SHC) Programme.
The objectives of this Task were to catalyse the
development and market introduction of high quality and commercial competitive
PV/Thermal Solar Systems and to increase general understanding and contribute to
internationally accepted standards on performance, testing, monitoring and
commercial characteristics of PV/Thermal Solar Systems in the building sector.
The heart in a PV/Thermal Solar System is a PhotoVoltaic/Thermal module, or PV/T
module which is a combination of photovoltaic cells with a solar thermal
collector, forming one device that converts solar radiation into electricity and
heat simultaneously. Apart from the PV/T module also components as hot water
storage tanks, heat exchangers, piping, controllers, inverters, wiring and heat
pumps can form part of a PV/Thermal Solar System.
PV/T modules can generate more energy per unit surface area than side by side
photovoltaic panels and solar thermal collectors, at a potentially lower
production and installation cost. Moreover, PV/T modules share the aesthetic
advantage of PV. Because of their high efficiency per unit surface area, PV/T is
particularly well suited for applications with both heat and power demand and
with limited roof space available. Therefore, the potential of PV/T is
especially large in the residential market, both collective and individual.
An overview of
commercially available PV/T products can be downloaded here.
There are many ways to combine the different PV and Solar Thermal technologies
to a PV/T collector: crystalline or amorphous silicon or thin-film PV, liquid or
air collectors, flat-plate or concentrating technologies with or without
transparent cover, some fully building integrated. So far, most development has
been done on silicon technologies with liquid and air, flat-plate type
collectors. Furthermore, work has been done on concentrating and combined
liquid/air PV/T collectors and on building integrated systems for preheating of
e.g. ventilation air.