Table 2
STSC design parameters.
Design parameters Operating conditions
Number of absorber
tubes
32 Direct solar
radiation
900 W/
m2
Outside diameter of
the tubes
0.63 cm Air velocity 2.3 m/s
Material absorber
tubes
SS 316 Ambient
temperature
315 K
Absorber area 6.44 102 m2 Solar maximum
altitude
80.7
Reflectance of the
reflector
0.92 Fluid temperature 929 K
Insulation conductivity 0.042 W/(m K) Heat transfer to
fluid
8423 W
Insulation thickness 0.075 m Total error 12 mrad
2