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 10.71P
(a)
To determine
The cold temperature for
(b)
To determine
The cold temperature for
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Please help me with the problem shown in the figure thanks
Saturated, 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.
can you answer the question
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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- What are the surface condensing systems? Explain their working.arrow_forward.All properties should be evaluated at the temperature of the steam.Saturated, pure steam at 65 ºC condenses on the surface of a vertical tube with outersurface diameter 2 cm which is maintained at a uniform temperature of 35 ºC. Determinethe tube length for a condensate flow rate of 5 x 10-3 kg/s.arrow_forwarda film-type condenser consists of a packed bed of 3-cm diameter spheres with a voidage of 35%. water sprayed onto the bed at 60oC is used to condense steam entering at the base at a saturation temperature of 100oC. How deep must the bed be to ensure complete condensation of the steam, and what is the outlet temperature of the water? (Use water properties based on the mean of the inlet and outlet water temperatures, and iterate if necessary)arrow_forward
- Analyze the condensation process using both chillers. Provide operating temperatures and pressures entering each component shown in the diagram (at points 1, 2, 3, 4). Indicate which chiller should be chosen based on the economics. See below for details: -Your work is replacing a chiller that is used as part of a distillation process that condenses methanol (boiling point = 65 °C). Your task is to select the most economical type of system. A conventional chiller will have a lower first cost and will have lower maintenance costs than one that involves enhanced heat transfer surfaces, but the chiller with enhanced surfaces will condense the same amount of alcohol with a lower energy consumption. Select the appropriate chiller by considering the net present value of both systems. That value will involve the first cost of the chiller, and the present value of the maintenance and energy costs. The chiller uses a standard vapor-compression refrigeration cycle with R-22 (see Figure 1). For…arrow_forwardWater is to be boiled at atmospheric pressure in a polished copper pan placed on top of a heating unit. The diameter of the bottom of the pan is 00.2 m. If during 30 minutes the water level is dropped by 0.1 m, calculate the inner surface of the bottom of the pan. Assumptions 1 Steady operating conditions exist. 2 Heat losses from the heater and the pan are negligible 3 The boiling regime is nucleate boiling. Note. Write your answer step by step and clearly explain your work. You need to upload a file.arrow_forwardWhat do you mean by condensation? Explain in details.arrow_forward
- What is condensation and when does occurs? How does filmwise condensation differs from drop-wise condensation? Which type has a higher heat transfer film coefficient and point out the reason thereof?arrow_forwardWater at atmospheric pressure is boiled in a container using a horizontal 8 mm electric wire (ε=0.9) whose temperature is maintained by an electric current at 250oC. Estimate the boiling heat transfer coefficient between the water and the wire surface. Properties of Water, liquid: ρl = 957.9 kg/m3, hfg = 2257 kJ/kg, vapor: ρv = 4.8 kg/m3, Cp,v = 2560 J/kg.K, μv = 14.85*10-6 N.s/m2, kv=0.0331 W/mK. Select one: a. 247 W/m2K b. 440 W/m2K c. 90.7 W/m2K d. 710 W/m2Karrow_forwardneed soon all parts don't copy I will downvotearrow_forward
- Question 3 Which statement about vaporization enthalpy and condensation enthalpy is correct? O The condensation enthalpy is equal in magnitude but opposite in sign when compared to the vaporization enthalpy O There is no general relationship between these two quantities and the values depend on the substance involved. O The vaporization enthalpy is always less than the condensation enthalpy. O The vaporization enthalpy is exactly equal to the condensation enthalpy.arrow_forwardWhich of the following is not an assumption that Nusselt made in analytically deriving the average heat transfer coefficient over a vertical surface surrounded by vapor undergoing film condensation? A. Film thickness is zero at the top of surface B. Falling film is undergoing laminar flow C. Heat transfer from the condensing vapor to the surface is happening via natural convection D. All the assumptions above are important to the film condensation problemarrow_forwardWill the largest condensation heat transfer coefficient always be obtained for a horizontal finned tube with the maximum possible fpm?arrow_forward
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