Fundamentals of Heat and Mass Transfer
7th Edition
ISBN: 9780470917855
Author: Bergman, Theodore L./
Publisher: John Wiley & Sons Inc
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Chapter 10, Problem 10.6P
To determine
The nucleate pool boiling heat transfer coefficient.
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Saturated, pure steam at a temperature of 170 oC condenses on the outer surface of avertical tube of outer diameter 2 cm and length 1.5 m. The tube surface is maintained at auniform temperature of 150 oC.Calculate:a) the local film condensation heat-transfer coefficient at the bottom of the tube.
b) the average condensation heat-transfer coefficient over the entire length of the tube.
c) the total condensation rate at the tube surface.
Chapter 10 Solutions
Fundamentals of Heat and Mass Transfer
Ch. 10 - Show that, for water at 1-atm pressure with...Ch. 10 - The surface of a horizontal. 7-mm-diameter...Ch. 10 - The role of surface tension in bubble formation...Ch. 10 - Estimate the heat transfer coefficient, h,...Ch. 10 - Prob. 10.5PCh. 10 - Prob. 10.6PCh. 10 - Prob. 10.7PCh. 10 - Prob. 10.8PCh. 10 - Calculate the critical heat flux on a large...Ch. 10 - Prob. 10.11P
Ch. 10 - Prob. 10.12PCh. 10 - Prob. 10.13PCh. 10 - Prob. 10.15PCh. 10 - Prob. 10.16PCh. 10 - Consider a gas-fired boiler in which five coiled,...Ch. 10 - Prob. 10.18PCh. 10 - Prob. 10.19PCh. 10 - Prob. 10.20PCh. 10 - Prob. 10.22PCh. 10 - Prob. 10.24PCh. 10 - Prob. 10.25PCh. 10 - A small copper sphere, initially at a uniform,...Ch. 10 - Prob. 10.28PCh. 10 - A disk-shaped turbine rotor is heat-treated by...Ch. 10 - A steel bar, 20 mm in diameter and 200 mm long,...Ch. 10 - Electrical current passes through a horizontal....Ch. 10 - Consider a horizontal. D=1 -mm-diameter platinum...Ch. 10 - Prob. 10.34PCh. 10 - Prob. 10.35PCh. 10 - Prob. 10.36PCh. 10 - Prob. 10.37PCh. 10 - A polished copper sphere of 10-mm diameter,...Ch. 10 - Prob. 10.39PCh. 10 - Prob. 10.40PCh. 10 - Consider refrigerant R-134a flowing in a smooth,...Ch. 10 - Determine the tube diameter associated with p=1...Ch. 10 - Saturated steam at 0.1 bar condenses with a...Ch. 10 - Prob. 10.45PCh. 10 - Prob. 10.46PCh. 10 - Prob. 10.47PCh. 10 - Prob. 10.48PCh. 10 - Prob. 10.50PCh. 10 - Prob. 10.53PCh. 10 - The condenser of a steam power plant consists of...Ch. 10 - Prob. 10.56PCh. 10 - Prob. 10.61PCh. 10 - Prob. 10.62PCh. 10 - A technique for cooling a multichip module...Ch. 10 - Determine the rate of condensation on a 100-mm...Ch. 10 - Prob. 10.66PCh. 10 - Prob. 10.67PCh. 10 - Prob. 10.70PCh. 10 - Prob. 10.71PCh. 10 - Prob. 10.74PCh. 10 - Prob. 10.75PCh. 10 - A thin-walled cylindrical container of diameter D...
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- Handwrite pleasearrow_forwardEstimate the power required to boil the water in a copper pan (Cs,f = 0.013 and n = 1), 180 mm in diameter. The bottom of the pan is maintained at 115 ℃ by the heating element of an electric range. Properties of Water (1 atm): Tsat = 100℃, ρl = 957.9 kg/m3, ρv = 0.5955 kg/m3, Cpl = 4217 J/kg.K, μl = 279*10^-6 N.s/m2, Prl = 1.76, hfg = 2257 kJ/kg, σ = 58.9*10^-3 N/m. Select one: a. 16420 W b. 18166 W c. 16240 W d. 11760 Warrow_forwardSaturated, pure steam at a temperature of 170 oC condenses on the outer surface of a vertical tube of outer diameter 2 cm and length 1.5 m. The tube surface is maintained at a uniform temperature of 150 oC. Calculate: the local film condensation heat-transfer coefficient at the bottom of the tube. the average condensation heat-transfer coefficient over the entire length of the tube. the total condensation rate at the tube surface.arrow_forward
- Region I Region II Maximum Region IV | critical) heat | flux. Film Nucleate boiling to Transition boiling boiling Natural convection 10 Minimum boiling Slugs and heat flux,4 Di min to columns- Isolated Region II bubbles 10 10 30 100 320 1000 AT=T,-T. (C) Figure 2. Boiling mechanisms for water. Table 1. Heating Resistor Features. Features and Benefits Power rating of 17.0608 Btu/min • Diameter of 10 mm Length of 65 mm Quartz resistance wire for maximum heater life • TIG-welded end disc prevents contamination and moisture absorption Fibreglass lead wire insulation • Complies with Electrostatic Control Standards ANSI/ESD S20.20:2014 and BS EN 61340-5- 1:2007 ROHS compliant on restricted hazardous substances 4 (W/m)arrow_forwardWill the largest condensation heat transfer coefficient always be obtained for a horizontal finned tube with the maximum possible fpm?arrow_forwardWater is to be boiled at atmospheric pressure in a polished copper pan by means of an electric heater. The diameter of the pan is 0.48 m and is kept at 108 deg C. What is the power required to boil the water? Tsat = 100°C; Properties of water at 100°C: Density, pl= 961 kg/m3; Kinematic viscosity., v 0.293x10-6 m2/s; Prandti Number, Pr = 1.740; Specific heat, Cpl = 4216 J/kg.K: Dynamic viscosity, p = p x v = 961 x 0.293 x 10-6 = 281.57 x10-6 Ns/m2; hfg = 2256.9 k/kg: pv = 0.597 kg/m3; 0 = 0.0588 N/m: Csf=0.013; n=1: Select one: O a. 11633.5098 O b. 13259.1393 O c. 16641.2421 O d. 9493.7946arrow_forward
- A vertical condenser composed of ½” and 1.5” Std Steel pipes will handle cyclohexane vapor condensing at 1 atm inside the small pipe. Assume water as the cooling medium at an average temperature of 70oC and heat transfer coefficient of 3000 W/m2 -K. Assuming film type condensation, what is the mass rate of cyclohexane if the exchanger is 1.5 m long?arrow_forward6. A vertica platc 450 mm high and maintained at 3°C is exposed o satuated seam atatmospheric pressare. Calculte: (1) The rate of hea ransfe, and () The condensate a per hour per mete for plae widih film condensation. “The propertiesof waer im at the mean temperaure are: 0.3 kg/m sk = 6.4 x 10 WinC; = 434 x 10° kg/ms; and b = 22569 kg [Ans. 4399 x 10° kI, 2188 ke/h]arrow_forwardcan you answer the questionarrow_forward
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