FHR provides third-gener­ation tube coating solutions for solar thermal absorbers in concen­trated solar power plants (CSP) – highly productive sputtering systems to deposit complex thin film systems on tube surfaces

When it comes to func­tional lay­ers for solar thermal applic­a­tions, then greatest import­ance is attached to the best pos­sible absorp­tion of solar radi­ation while the emis­sion of heat (IR radi­ation) shall of course be as low as feas­ible. These prop­er­ties are achieved by way of coat­ing the absorber tubes under vacuum with a spe­cial sys­tem of thin films con­sist­ing of metal­lic and ceramic lay­ers. FHR Anla­gen­bau provides for the solar thermal energy mar­ket to their Taiwanese cus­tomer Xxentria tube coat­ing solu­tions of the third gen­er­a­tion which fea­ture the phys­ical vapour depos­ition tech­no­logy (PVD). These cut­ting-edge, highly ver­sat­ile and pro­duct­ive vacuum coat­ing sys­tems of the FHR.Line series are ideally suited for tube dia­met­ers ran­ging from 25 mm to 100 mm. The types of mag­net­rons used can be chosen freely and the sput­ter­ing tar­gets can be arranged in an appro­pri­ate way, which makes for cus­tomer-spe­cific optim­isa­tion of the sput­ter­ing con­fig­ur­a­tion with view to both layer sys­tem and tubu­lar geo­metry of the sub­strates. An absorptance of more than 95 per cent and low­est emissiv­ity can already be achieved with an inex­pens­ive stand­ard layer sys­tem depos­ited on the absorber tube sur­faces.