Local heat transfer measurements of steam/air mixtures in horizontal condenser tubes

Helium-Liquefaction by a Cryocooler in Closed-Loop Cooling System for 21 T Ft-Icr Magnets

“…The Nusselt number increases with Reynolds number for a given quality. Also Nu decreases with quality for a given Re and has its lower limit when x = 0 or liquid flow, as proved by experimentally in the recent research [7]. When the mass flow rate is 250 mg/s or corresponding Re is 2.98×10 4 , Nu is 73.1 and increases with quality as indicated by dots in FIGURE 3.…”

Experimental and theoretical investigation on condensation inside a horizontal tube with noncondensable gas

“…The developed model was also tested with Kuhn's experiment [9] for vertical in-tube condensation and Wu's experiment [31] for horizontal in-tube condensation. Run number 3.3-2 of Kuhn's experiment was performed with the inlet steam flow rate of 59.5 kg/h, the inlet air flow rate of 6.75 kg/h, the inlet mixture pressure of 199 kPa, annular flow.…”

“…From the aspect of experiments, Wu and Vierow [31] studied the heat transfer and fluid flow phenomena in a horizontal condenser tube, together with the heat transfer reduction effect of the noncondensable gas. They found that the condensation heat transfer coefficients on the tube top were much greater than the values at the bottom and the noncondensable gas significantly reduced the heat transfer rate.…”

Experimental study of steam–air condensation over a vertically longitudinal finned tube

“…And steam-air condensation heat transfer has been widely studied for the smooth tube [7][8][9][10][11][12]. The earliest study of steam-air condensation was conducted by Othmer in 1929 [7].…”