highest efficiency solar heat pipe collector

andrea(_at_) suntasksolar.com Manifold(exterior):aluminum alloy Glass tube dimensions:58mmX1.8m/58mmX0.85m Daily efficiency:>55% Hail resistance:25mm Max pressure:12Bar Coating of vacuum tube:ALN/AIN-SS/CU Heat pipe:anti-freezing>-35C Solar keymark certificate types: SCM12-58/1800 SCM15-58/1800 SCM20-58/1800 SRCC certificate types: SR10-58/1800 SR15-58/1800 SR20-58/1800 SR30-58/1800 Model name SCM12-58/1800 SCM15-58/1800 SCM20-58/1800 number of tubes 121520Gross size(mm) 1010*1980 (W*L)1235*1980 (W*L)1610*1980 (W*L)aperture area M2 1.1081.3971.876Absorber area M2 0.9641.1991.603flat roof installation size 1420*1010*1420mm (L*W*H)1420*1235*1420mm (L*W*H)1420*1610*1420mm (L*W*H)weight empty (KG) 40.75664.4fluid volume( L) 0.811.37Heat transfer medium pure water/glycolpure water/glycolpure water/glycolworking pressure 6 bar6 bar6 barMax testing pressure 12 bar12 bar12 barMax working temperature 280°C280°C280°Cefficiency n° 0.7880.790.795inlet/outlet connection 22mm22mm22mmmanifold packing mm 1*2000*200*1601*2000*200*1601*2000*200*160tubes packing mm 1*1940*280*2701*1940*350*2702*1940*350*180certificate EN12975-1,2 SOLAR KEYMARKEN12975-1,2 SOLAR KEYMARKEN12975-1,2 SOLAR KEYMARK Material vacuum tube high borosilicate glasssize 58*1800mmcoating SS-CU-AIN/ALNheat pipe material TU1 copperheat pipe length 1790mmheat pipe diameter condenser dia14mm, body dia 8mmmanifold header pipe TP2 copper dia 35mmmanifold casing anodized aluminum alloyinsulation rock wool with polyurethane foambracket galvanized steeltube holder UV stabilized nylonseals silicon sealcontact sheets aluminum fin