scholarly journals Critical Heat Flux under Flow Oscillation in a Natural Circulation Loop of Liquid Nitrogen.

1997 ◽  
Vol 11 (1) ◽  
pp. 56-65 ◽  
Author(s):  
Hisashi UMEKAWA ◽  
Mamoru OZAWA ◽  
Naoki ISHIDA
Keyword(s):  
Heat Flux ◽  
Liquid Nitrogen ◽  
Critical Heat Flux ◽  
Natural Circulation ◽  
Circulation Loop ◽  
Flow Oscillation ◽  
Natural Circulation Loop

618 Analysis of Flow Oscillation in Natural Circulation Loop

2001 ◽  
Vol 2001.39 (0) ◽  
pp. 237-238
Author(s):  
Hirotaka MATSUMURA ◽  
Sinichi FUKUHARA ◽  
Shoji YAMAUCHI
Keyword(s):  
Natural Circulation ◽  
Circulation Loop ◽  
Flow Oscillation ◽  
Natural Circulation Loop

Natural-Circulation Tests With Water at 800 to 2000 Psia Under Nonboiling, Local Boiling, and Bulk Boiling Conditions

1961 ◽  
Vol 83 (3) ◽  
pp. 261-273 ◽  
Author(s):  
O. J. Mendler ◽  
A. S. Rathbun ◽  
N. E. Van Huff ◽  
A. Weiss
Keyword(s):  
Heat Flux ◽  
Natural Circulation ◽  
Rectangular Channel ◽  
Heat Fluxes ◽  
Circulation Loop ◽  
Flow Conditions ◽  
Two Phase ◽  
Forced Circulation ◽  
Flow Fluctuations ◽  
Natural Circulation Loop

Natural and forced-circulation test data for a closed-loop system are presented and analyzed. The data were obtained at pressures of 800, 1200, 1600, and 2000 psia from the natural-circulation loop at the Bettis Laboratory, using single rectangular channel test sections (0.100 in. × 1.0 in. × 27.0 in. long, 0.200 in. × 1.0 in. × 27.0 in. long, and 0.250 in. × 1.0 in. × 27.0 in. long). Heat fluxes ranged from 50,000 Btu/hr-sq ft to burnout with inlet subcoolings of 20, 70, and 100 deg F. The results showed that single and two-phase pressure drop, burnout heat flux, and riser density measured under natural-circulation operation are no different from those measured with forced circulation at the same thermal and fluid flow conditions. For the loop studied, it was shown that natural-circulation-loop flow rates can be predicted to within 10 per cent for both single and two-phase flow. Some data for slip ratios at liquid velocities less than 1/2 fps and for two-phase exit losses were obtained. Flow fluctuations were noted during some of the natural-circulation runs; these occurred before burnout heat flux was reached. In some instances these fluctuations were severe enough to cause a premature burnout.

NATURAL CIRCULATION LOOP OF SUBCOOLED LIQUID NITROGEN

2008 ◽  
Author(s):  
M. J. Kim ◽  
H. M. Chang ◽  
J. G. Weisend ◽  
John Barclay ◽  
Susan Breon ◽  
...  
Keyword(s):  
Liquid Nitrogen ◽  
Natural Circulation ◽  
Circulation Loop ◽  
Subcooled Liquid ◽  
Natural Circulation Loop
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