8.71 A 50-mm-diameter, thin-walled metal pipe covered with a 25-mm-thick layer of insulation (0.085 W/m.K) and carrying superheated steam at atmospheric pressure is suspended from the ceiling of a large room. The steam temperature entering the pipe is 120°C, and the air tem- perature is 20°C. The convection heat transfer coefficient on the outer surface of the covered pipe is 10 W/m².K. If the velocity of the steam is 10 m/s, at what point along the pipe will the steam begin condensing?

8.71 A 50-mm-diameter, thin-walled metal pipe covered with a 25-mm-thick layer of insulation (0.085 W/m.K) and carrying superheated steam at atmospheric pressure is suspended from the ceiling of a large room. The steam temperature entering the pipe is 120°C, and the air tem- perature is 20°C. The convection heat transfer coefficient on the outer surface of the covered pipe is 10 W/m².K. If the velocity of the steam is 10 m/s, at what point along the pipe will the steam begin condensing?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter3: Transient Heat Conduction

Section: Chapter Questions

Problem 3.10P: 3.10 A spherical shell satellite (3-m-OD, 1.25-cm-thick stainless steel walls) re-enters the...

See similar textbooks

Related questions

Q: Explore the effect of insulation thickness on the heat loss q and the temperature of the insulation…

Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…

A: Given Data Outer diameter of the steel pipe is: do=100 mm=0.1 m Thickness of the inner layer is:…

Q: The rectangular wall of a furnace consists of 3in. fire clay brick surrounded by 0.25in. of steel on…

Q: What is the fin effectiveness of a rectangular plate fin made of aluminum O.3 mm thick mounted on a…

Q: Water flows at 67 C inside a 2.5 cm inside diameter tube such that hi = 3500 W/m² .C. The tube has a…

Q: Consider 469 mm × 447 mm window in an aircraft. For a temperature difference of 98°C from the inner…

Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…

Q: A 20 m metal pipe, with a thermal conductivity of 60 W/(m. K), is carrying pasteurised orange juice…

A: Given: Length of the pipe→L=20 m Thermal conductivity of metal pipe→k1=60 W/mK Temperature of orange…

Q: Water flows at 50 C inside a 2.5-cm-inside-diameter tube such that h, =3500 W/m2 C. The tube has a…

Q: 3. A pipe carrying the liquid at -20°C is 10 mm in outer diameter and is exposed to ambient at 25°C…

A: Write the given data. Ti=-20 °Cr1=5 mmh∞=50 W/m2KT∞=25 °Ckins=0.5 W/mKL=1 mt1=2.5 mmt2=7.5 mmt3=15…

Q: Problem-2: A 2.2-mm-diameter and 10-m-long electric wire is tightly wrapped with a 1-mm-thick…

A: The interface temperature and change in the interface temperature.Given:The radius of the wire is…

Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…

A: Given The outer diameter of the pipe is do=100 mm. The thickness of inner layer insulation is ti=40…

Q: A Thermopane window consists of two 3-mm-thick pane of glass separated by a stagnant air space of…

Q: Air at 4 °C is being carried within a metal cylindrical pipe to a storage room at a bioprocessing…

Q: A 112 m steel pipe has a 246.4˚C temperature, diameter of 230.8 mm is insulated with a 203.9 mm…

Q: Fins are used to improve heat transfer by increasing the effective * surface area TRUE O False O

A: Hi. as you have posted multiple questions and not specified which question needs to be solved, we…

Q: A steel pipe 150mm external diameter conveys steam at a temperature of 260°C and is covered by two…

Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…

A: Given data: The diameter of the steel pipe, d = 100 mm. The thickness of the inner insulation, t1 =…

Q: . Saturated steam at 500 K flows in a 0.20 m inside diameter, 0.21 m outside diameter pipe. The pipe…

Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…

A: Given The outer diameter of the pipe is do=100 mm. The thickness of inner layer insulation is ti=40…

Q: An uninsulated 100-mm diameter steam pipe runs for 25-meters inside a room whose walls and air are…

Q: a. Heat loss per hour. = Answer kJ / hour. b. Temperature between insulation layers. = Answer ° C.

Q: How many inches of insulation are required to insulate a ceiling such that the surface temperature…

A: Given: Attic temperature→T1=49°C Room temperature→T2=20°C Because ceiling facing the living area is…

Q: Explore the effect of insulation thickness on the heat loss q and the temperature of the insulation…

A: The data given is, Outside pipe radius, r1 = d1/2 = 0.025 m Outside air temperature, T = 30°C = 303…

Q: 2. A steam line is covered with two successive layers of insulation. The 1.6 in thick layer in…

Q: One vessel having a carbon-steel wall of thickness 5 mm carrying saturated steam and water at 423K.…

Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

100%

8.71 A 50-mm-diameter, thin-walled metal pipe covered with
a 25-mm-thick layer of insulation (0.085 W/m.K) and
carrying superheated steam at atmospheric pressure is
suspended from the ceiling of a large room. The steam
temperature entering the pipe is 120°C, and the air tem-
perature is 20°C. The convection heat transfer coefficient
on the outer surface of the covered pipe is 10 W/m².K.
If the velocity of the steam is 10 m/s, at what point along
the pipe will the steam begin condensing?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

2.7 A very thin silicon chip is bonded to a 6-mm thick aluminum substrate by a 0.02-mm thick epoxy glue. Both surfaces of this chip-aluminum system are cooled by air at , where the convective heat transfer coefficient of air flow is . If the heat dissipation per unit area from the chip is under steady-state conditions, draw the thermal circuit for the system and determine the operating temperature of the chip.
3.10 A spherical shell satellite (3-m-OD, 1.25-cm-thick stainless steel walls) re-enters the atmosphere from outer space. If its original temperature is 38°C, the effective average temperature of the atmosphere is 1093°C, and the effective heat transfer coefficient is , estimate the temperature of the shell after reentry, assuming the time of reentry is 10 min and the interior of the shell is evacuated.
2.42 A circumferential fin of rectangular cross section, 3.7-cm OD and 0.3 cm thick, surrounds a 2.5-cm- diameter tube as shown below. The fin is constructed of mild steel. Air blowing over the fin produces a heat transfer coefficient of K. If the temperatures of the base of the fin and the air are and , respectively, calculate the heat transfer rate from the fin.
please include assumptions
In the final stages of production, a pharmaceuticalis sterilized by heating it from 30°C to 75°C as it moves at0.2 m/s through a straight thin-walled stainless steeltube of 12.7-mm diameter. A uniform heat flux is maintained by an electric resistance heater wrappedaround the outer surface of the tube. If the tube is 10 m long, what is the required heat flux? If fluidenters the tube with a fully developed velocity profile and a uniform temperature profile, what is thesurface temperature at the tube exit? Fluid properties may be approximated as ? = 1000 kg/m3, cp =4000 J/kg K, ? = 2 x 10-3 kg/s m, k = 0.8 W/m K, and Pr = 10.
Please fats. The answer in the box is incorrect
You are asked to design a metal hot dog holder for roasting hot dogs over an opencampfire. The holder is to be designed such that while the end holding the hot dogbecomes cherry red (1400oF), the other end can still be held without using aninsulated handle or glove (~95oF). Design it such that it can be used even on awarm, still day, Tf = 90oF (Assume the convective heat transfer coefficient, h, fora horizontal cylinder is uniform over the whole cylinder and equal to 4.0Btu/hrft2oF)
Required information Heat dissipated from an engine in operation can cause hot spots on its surface. If the outer surface of an engine is situated in a place where oil leakage is possible, then when leaked oil comes in contact with hot spots above the oil's autoignition temperature, it can ignite spontaneously. Consider an engine cover that is made of a stainless-steel plate with a thickness of 1 cm and a thermal conductivity of 14 W/m.K. The stainless-steel plate is covered with a 5-mm-thick insulation (k=0.5 W/m.K). The inner surface of the engine cover is exposed to hot air at 350°C with a convection heat transfer coefficient of 5 W/m².K as shown in the figure. The 2-m-long engine outer surface is cooled by air blowing in parallel over it at 7 m/s in an environment where the ambient air is at 60°C. To prevent fire hazard in the event of oil leak on the engine cover, the engine cover surface should be kept below 180°C. It has been determined that the 5- mm-thick insulation layer is…
A stainless steel tube (AISI 304) with 36 mm internal diameter and 2mm wall thickness is used for transporting a fluidrefrigerated. The fluid is kept at 6oC and the ambient air is at 23oC, being the convective coefficients of the inner and outer sides equal to 100 W/(m2 oC) and 50 W/(m2 oC), respectively. Ask:(a) Estimate the global heat transfer coefficient for thisprocess and identify the limiting resistance between the resistancesinvolved;(b) What is the heat gain per unit length of the tube?(c) What is the temperature at the surface of the tube exposed to air?(d) If a 10 mm insulating layer is inserted into the surfaceexposed pipe (kiso=0.050 W/(m.K)), what will be the heat gainper unit of tube length and the new temperature of theexposed surface?
An ordinary egg can be approximated as a 5.5-cm-diameter sphere whose thermal conductivity of roughly k = 0.6- W mk overall density of p = 1000; and heat capacity of C₂ = 3000- kg m² The egg is initially at a uniform temperature of T₂ = 10°C and is dropped into boiling water at T.. = 90°C W - determine how long it will take for the egg to m²K Taking the convective heat transfer coefficient to be h reach T = 70°C. In solving the problem, please follow the steps below. For the Lump Model In solving this problem, please use the lump model method (ignoring the requirement of small Biot number and discuss the outcomes, 1. 2. Compute the characteristic length Lc Compute the volume and surface area of the sphere (as the egg model) Vol As 3. Compute the diffusivity α = = 10- k p Cp = J kgk Compute non-dimensional excessive temperature 0 = h Lc k 4. Compute the Biot number using the characteristic length found above Bi = T-Too 5. Ti-Too 6. Calculate the Fourier number from the equation =…
A vertical cooling fin approximates a flat plate 800 mm in height is.exposed to saturated steam at 100°C (hig 2257 kJ/kg). The fin is maintained at a temperature of 80°C. Calculate: i)Thickness of film at bottom of the fin, ii) Average heat transfer coefficient, 111) The rate of heat transfer. The relevant fluid properties are, P, = 965.3 kg/m³ k, = 0.68 W/m°C 4,= 3.153 x 10 N s/m?
Read the question carefully and give me right solution according to the question Note: Don't copy from other experts solution