Tham khảo tài liệu 'a heat transfer textbook - third edition episode 3 part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 514 Chapter 9 Heat transfer in boiling and other phase-change configurations Water at 100 atm boils on a nickel heater whose temperature is 6 C above Tsat. Find h and q. Water boils on a large flat plate at 1 atm. Calculate qmax if the plate is operated on the surface of the moon at 6 of dearth-normal . What would qmax be in a space vehicle experiencing 10 4 of dearth-normal Water boils on a m diameter horizontal copper wire. Plot to scale as much of the boiling curve on log q vs. log AT coordinates as you can. The system is at 1 atm. Redo Problem for a m diameter sphere in water at 10 atm. Verify eqn. . Make a sketch of the q vs. Tw - Tsat relation for a pool boiling process and invent a graphical method for locating the points where h is maximum and minimum. A 2 mm diameter jet of methanol is directed normal to the center of a cm diameter disk heater at 1 m s. How many watts can safely be supplied by the heater Saturated water at 1 atm boils on a cm diameter platinum rod. Estimate the temperature of the rod at burnout. Plot Tw - Tsat and the quality x as a function of position x for the conditions in Example . Set x 0 where x 0 and end the plot where the quality reaches 80 . Plot Tw - Tsat and the quality x as a function of position in an 8 cm . pipe if kg s of water at 100 C passes through it and qw 200 000 W m2. Use dimensional analysis to verify the form of eqn. . Compare the peak heat flux calculated from the data given in Problem with the appropriate prediction. The prediction is within 11 . Problems 515 The Kandlikar correlation eqn. can be adapted subcooled flow boiling with x 0 region B in Fig. . Noting that qw hfb Tw - Tsat show that qw 1058 hloF Ghfg -07 Tw - Tsat 1 0 3 in subcooled flow boiling . Verify eqn. by repeating the analysis following eqn. but using the . du dy y g Tg ụ. in place of du dy y g 0. Verify .
