Vacuum tube:

Specification:

1:ø47mmx1800mm 2:ø58mmx1800mm 3:ø58mmx1900mm 4:ø58x2100mm

Structure:All-glass double-tube co-axial structure

Glass material:High borosilicate 3.3 glass

Absorptive coating property:

Structure:Cu/ss-aln(h)/ss-aln(l)/aln

Sediment method:3 target magnetron sputtering plating

Specific absorption:As=0.93~0.96(am1.5)

Emission ration:H=0.04~0.06(80°C±1.5°C)

Vacuum tightness:P<=5.0*10-³Pa

Idle sunning property parameters:Y=260~300m².°C/kw

Solar irradiation for obtaining a preset water temperature:

H<=4.7mj/m²(φ58) h=3.7~4.2mj/m²

H<=3.7mj/m²(φ47) h=2.9~3.2mj/m²

Average heat loss coefficient:Ult=0.4~0.6w/(m².°C)