ISSN Online: 2377-424X
International Heat Transfer Conference 3
EXPERIMENTAL INVESTIGATION OF NATURAL CONVECTION IN SINGLE AND MULTIPLE VERTICAL ANNULI WITH HIGH PRESSURE CARBON DIOXIDE
Sinopsis
An experimental investigation has been
undertaken to measure the natural convective
heat transfer coefficients in narrow vertical
annuli containing carbon dioxide at pressures
up to 50 atmospheres. Firstly, the properties
of single annular gaps were studied, and
secondly, configurations with an annular gap
sub-divided laterally.
The annular gaps for the single annuli were 0.300, 0.150 and 0.050 in., and the annulus which was sub-divided was that with a gap of 0.300 in.
The results for the single gaps have been correlated in the form:
Nut = A(GrtPr)0.30(H/t)−0.25 For the multiple gaps, although improvement in insulating properties is significant, the magnitude is not as large as expected from simple analysis.
The annular gaps for the single annuli were 0.300, 0.150 and 0.050 in., and the annulus which was sub-divided was that with a gap of 0.300 in.
The results for the single gaps have been correlated in the form:
Nut = A(GrtPr)0.30(H/t)−0.25 For the multiple gaps, although improvement in insulating properties is significant, the magnitude is not as large as expected from simple analysis.