7th Edition

ISBN: 9780470917855

Author: Bergman, Theodore L./

Publisher: John Wiley & Sons Inc

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It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. T…

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Textbook Question

Chapter 8, Problem 8.67P

Repeat Problem 8.66 for a circular tube of diameter D = 2 mm . an applied heat flux of q n = 200 , 000 W/m 2 . and a mass flow rate of m = 1 0 g / s .

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Chapter 8, Problem 8.66P

Chapter 8, Problem 8.68P

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3. Water at an average bulk temperature of 80 F flows inside a horizontal smooth tube with wall temperature maintained at 180 F. The tube length is 6 ft and the diameter is 0.5 in. The flow velocity is 0.4 ft/s. Calculate the heat transfer rate. For water, c = 1 Btu/lb-F and k = 4.27 Btu- in/hr-ft2-F. *

Current Attempt in Progress Consider pressurized water, engine oil (unused), and Nak (22 %/78%) flowing in a 20-mm-diameter tube. (a) Determine the mean velocity, in m/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for each of the fluids when the fluid temperature is 366 K and the flow rate is 0.014 kg/s. (b) Determine the mass flow rate, in kg/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for water and engine oil at 300 and 400 K and a mean velocity of 0.018 m/s. Part A Your answer is incorrect. Determine the mean velocity, in m/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for each of the fluids when the fluid temperature is 366 K and the flow rate is 0.014 kg/s. Liquid water engine oil Nak (m/s) ! i XALA(M) xer (m) Attempts: unlimited Submit Answer

Consider pressurized water, engine oil (unused), and Nak (22%/78%) flowing in a 20-mm-diameter tube. (a) Determine the mean velocity, in m/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for each of the fluids when the fluid temperature is 366 K and the flow rate is 0.01 kg/s. (b) Determine the mass flow rate, in kg/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for water and engine oil at 300 and 400 K and a mean velocity of 0.022 m/s. Part A Determine the mean velocity, in m/s, the hydrodynamic entry length, in m, and the thermal entry length, in m, for each of the fluids when the fluid temperature is 366K and the flow rate is 0.01 kg/s. Liquid Um (m/s) Xfdh (m) Xfd,t (m) water i engine oil i i i Nak i

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Fundamentals of Heat and Mass Transfer

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