A solar absorber with a solar absorptance of minimum 0.93 and a thermal emittance of maximum 0.06 for intermediate temperatures of 350°C are under development. The first step in the development has been to select candidates from theoretical modelling and temperature stability testing in vacuum of existing commercial and lab prepared absorber samples. The results shows that a few of the commercial absorber coatings that are used in low temperature (up to 100°C and ambient air pressure) are stable in vacuum (5 10-3 Pa) at 350°C. The results also show that a number of candidates of the modelled coatings fulfil this required minimum absorptance and maximum emittance.
New development of spectrally selective solar-absorbing coating for low and intermediate temperature applications
Crema, Luigi;Bartali, Ruben;
2010-01-01
Abstract
A solar absorber with a solar absorptance of minimum 0.93 and a thermal emittance of maximum 0.06 for intermediate temperatures of 350°C are under development. The first step in the development has been to select candidates from theoretical modelling and temperature stability testing in vacuum of existing commercial and lab prepared absorber samples. The results shows that a few of the commercial absorber coatings that are used in low temperature (up to 100°C and ambient air pressure) are stable in vacuum (5 10-3 Pa) at 350°C. The results also show that a number of candidates of the modelled coatings fulfil this required minimum absorptance and maximum emittance.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
