Constructive    and Dimensional Parameters
Receiver Tube Length2000    (room temperature) 4060    (room temperature)4060    (room temperature)4386    (room temperature)4386    (room temperature)4060    (room temperature)4025 (room    temperature)
4086.6 (400℃)4096    (550℃)4415    (400℃)4428    (550℃)4086.6    (400℃)4050 (400℃)
Aperture  Length92.1%
(400℃)
96.7%
(400℃)
96.5%
(550℃)
96.9%
(400℃)
96.6%
(550℃)
96.7%
(400℃)
95.0%
(400℃)
Absorber Tube Outer Diameter42mm70mm70mm80mm80mm88.9mm102mm
Absorber Tube Thickness1.5mm / 2mm2.2mm3mm2mm3mm 2.5mm7.5mm
Absorber Tube MaterialStainless    Steel
304L
Stainless    Steel
321
Stainless    Steel
321H
Stainless    Steel
321
Stainless    Steel
321H
Stainless    Steel
321
Stainless Steel
347H
Stainless steel tube according to ASTM A312
Glass Tube Outer Diameter90    / 100mm130    mm130    mm130    mm130    mm145    mm150 mm
Glass Tube Thickness2.5mm3mm3mm3mm3mm3mm3mm
Envelope Tube Materialborosilicateborosilicateborosilicateborosilicateborosilicateborosilicateborosilicate

Optical and Thermal Parameters
Average Thermal Emittance at 400ºC9%8.5%10% (550 ℃)
8.5% (400 ℃)
8.5%10% (550 ℃)
8.5% (400 ℃)
8.5%8.5%
Average Solar Transmittance (AM 1.5)96.5%96.7%96.7%96.7%96.7%96.7%96.7%
Average Solar Absortance96.2%96.2%96.2%96.2%96.2%96.2%96.2%
 
Operational    Parameters
Max. Operating Temperature300    ℃550    ℃550    ℃400    ℃550    ℃400    ℃550 ℃
Max. Operating Pressure40    bar40    bar40    bar40    bar40    bar40    bar40 bar
Annulus Vacuum Pressure10-2 Pa10-2 Pa10-2 Pa10-2 Pa10-2 Pa10-2 Pa10-2 Pa