
TY  - JOUR
A1  - Pailthorpe, BA 
A1  - Collins, RE 
A1  - O'Shea, S 
T1  - Temperature Limitation in Evacuated Solar Collector Tubes
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1987
VL  - 40
IS  - 5
SP  - 643
EP  - 658
KW  - 
UR  - https://doi.org/10.1071/PH870643 
N2  - A recent innovation in evacuated tubular solar collector technology is described. A desorbable gas, which specifically adsorbs on the graphitic solar selective surface, can reversibly degrade the vacuum by providing a heat conduction path at elevated temperatures. The stagnation temperature of the system is thus limited in a controllable manner without significantly degrading the low temperature performance. A simple theory incorporating the Langmuir adsorption isotherm and the Knudsen free molecule transport regime is used to describe the phenomenon. 
ER  -

