Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm thick, has a thermal conductivity of 0.07 W / (m K). The outer layer, 20 mm thick, has a thermal conductivity of 0.15 W / (m K). Pipes are used to delivering steam with a pressure of 600 kPa. The temperature on the outer insulation surface is 24 ° C. If the pipe is 10 m long, determine the following: (assuming that the conduction heat transfer resistance of the steel pipe and the vapor convection resistance are negligible). a. Hourly heat loss ... (kj / hr) b. temperature between insulation layers ... (° C.)

Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm thick, has a thermal conductivity of 0.07 W / (m K). The outer layer, 20 mm thick, has a thermal conductivity of 0.15 W / (m K). Pipes are used to delivering steam with a pressure of 600 kPa. The temperature on the outer insulation surface is 24 ° C. If the pipe is 10 m long, determine the following: (assuming that the conduction heat transfer resistance of the steel pipe and the vapor convection resistance are negligible). a. Hourly heat loss ... (kj / hr) b. temperature between insulation layers ... (° C.)

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.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.54P

See similar textbooks

Related questions

Q: (a) Determine the temperature at tip of spoon handle assuming heat transfer from the tip of the…

A: The thermal conductivity of stainless steel is The cross section area of spoon is The heat transfer…

Q: Q1) On a 2.7-cm-outer-diameter circular tube, a 1.5-mm-thick aluminum fin is placed. The fin…

A: The outer diameter of the tube is .The thickness of the fin is .The length of the fin is .The…

Q: Determine conductive resistance (in K/W) of a 80 m^2 plane wall composed of 2 layers:

Q: The wall of a 5 m high cylinderical steel tank (ks= 20 W/mK) of inner diameter 1.5 m and 200 mm…

A: The length of cylinder is .The thermal conductivity is .The inner diameter is .The thickness of…

Q: A steel pipe (outside diameter 100 mm) is covered with two layers of insulation. The inside layer,…

Q: Question 6 A steel pipe (k = 48 W/m-K) of a heating system carries wet steam at 120 °C. The inner…

A: Given: The conductivity of steel pipe is k1=48 W/m·K. The temperature of the steam is T1=120°C. The…

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: hermometric well is placed in a pipe having diameter of 55 mm. Pipe wall temperature is 100°C and…

A: For solution refer below images.

Q: A 3 inch schedule 40 pipe is covered with two layers of…

A: Given data: 3 inch schedule-40 pipe means nominal diameter is 3 inch and it's outside diameter is,…

Q: Steam at 350 °C flows through the stainless steel pipe with k=26 W/m.°C. The inner and outer…

Q: Metal vapor pipe with an outer diameter of 30 mm has a surface temperature of 400 k and will be…

Q: Steam at 230°C is flowing through a steel pipe (k = 15W/m °C) whose inner and outer diameters are 90…

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: A steam is flowing through a 5.7 m long of steel tube that has inner and outer radii of r, = 0.015…

Q: A pipe of length L connects to thermal reservoirs that are kept constant at temperatures T₁ and T₂.…

A: GivenReservoirs temeprature T1 and T2length of the pipe =Lx=0.2L

Q: (2) The pipeline made of steel tube with a diameter of 150x5mm, should be covered with two layers of…

A: The mathematical formula for the thermal resistance per unit length of a hollow cylinder is given as…

Q: In a thermal power plant, a horizontal copper pipe of "D" diameter, "L" length and thickness 1.2 cm…

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 oil radiator has an outside surface area of 0.18 m2 and operates at a surface temperature of 85…

A: GIVEN DATA- AREA A=0.18m2 T1=85'C T2=16'C h=38.25 W/m2K

Q: Stainless steel pipes with a thermal conductivity of 17 W / (m° C) are used to transport hot oil.…

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: 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: You are designing a 3m x 3m floor with radiant heating. The floor has 12 parallel pex pipes (k = 40…

A: Designing a 3m x 3m floor with radiant heating. 12 parallel pex pipes (k = 40 W/mK) L = 3m, OD =…

Q: 6.A 1.5 m pipe of negligible thickness holding a hot fluid at 140°C and having an outer diameter of…

A: Given Thermal conductivity, k1= 0.02 W/m.K k2 = 0.06 W/m.K…

Q: A thick-walled cylindrical tubing of hard rubber (k=0.151 W/m*K) having an inside radius of 5 mm and…

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

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

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%

a. Hourly heat loss ... (kj / hr)
b. temperature between insulation layers ... (° C.)

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps with 1 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

Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm thick, has a thermal conductivity of 0.07 W / (m K). The outer layer, 20 mm thick, has a thermal conductivity of 0.15 W / (m K). Pipes are used to deliver steam with a pressure of 600 kPa. The temperature on the outer insulation surface is 24 ° C. If the pipe is 8 m long, determine the following: (assuming that the conduction heat transfer resistance of the steel pipe and the vapor convection resistance are negligible). a. Heat loss per hour. = kJ / hour. b. Temperature between insulation layers. = ° C
Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm thick, has a thermal conductivity of 0.07 W / (m K). The outer layer, 20 mm thick, has a thermal conductivity of 0.15 W / (m K). Pipes are used to deliver steam with a pressure of 500 kPa. The temperature on the outer insulation surface is 24 ° C. If the pipe is 12 m long, determine the following: (assuming that the conduction heat transfer resistance of the steel pipe and the vapor convection resistance are negligible). a. Heat loss per hour. = Answer kJ / hour. b. Temperature between insulation layers. = Answer ° C.
Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm thick, has a thermal conductivity of 0.07 W / (m K). The outer layer, 20 mm thick, has a thermal conductivity of 0.15 W / (m K). Pipes are used to deliver steam with a pressure of 800 kPa. The temperature on the outer insulation surface is 24 ° C. If the pipe is 10 m long, determine the following: (assuming that the conduction heat transfer resistance of the steel pipe and the vapor convection resistance are negligible). a. Heat loss per hour. = AnswerkJ / hr. b. Temperature between insulation layers. = Answer ° C.
Stainless steel pipes with a thermal conductivity of 17 W/ (m° C) are used to transport hot oil. The temperature inside the tube is 130 ° C. The inner diameter of the pipe is 8 cm and the thickness of the pipe wall is 2 cm. The pipe is then insulated with 4 cm thick insulation with a thermal conductivity of 0.035 W / (m° C). The ambient temperature of the pipe is 25 ° C. Calculate the temperature between the steel and the insulation if we assume a steady state. A picture of the pipe can be seen below.
A steel pipe (outside diameter 100 mm) is covered with two layers of insulation. The inside layer, 40 mm thick, has a thermal conductivity of 0.07 W/(m K). The outside layer, 20 mm thick, has a thermal conductivity of 0.15 W/(m K). The pipe is used to convey steam at a pressure of 600 kPa. The outside temperature of insulation is 24°C. If the pipe is 10 m long, determine the following, assuming the resistance to conductive heat transfer in steel pipe and convective resistance on the steam side are negligible: a. The heat loss per hour. b. The interface temperature of insulation.
A thick-walled cylindrical tubing of hard rubber (k=0.151 W/m*K) having an inside radius of 5 mm and an outside radius of 20 mm is being used as a temporary cooling coil in a bath. Ice water is flowing rapidly inside, and the inside wall temperature is 275 K. The outside surface temperature is 300 K. A total of 20 W must be removed from the bath by the cooling coil. How many meter of tubing are needed?
A steam is flowing through a 5.7 m long of steel tube that has inner and outer radii of r, = 0.015 and r, 0,024 m, and a thermal conductivity of 0.14 W/m.K. The steam and the outer surface of the tube is maintained at constant temperature of 150 °C and the air = 25 °C, h = 0.35 W/m2.k) is surrounding the tube. To prevent the outer surface of the steel from the environmental conditions, a material that has a thermal conductivity of 0.014 W/m.k is wrapped over the outer surface of the steel. What is the maximum heat transfer from the steam to the air (W)? NOTE: Enter your answer. Answer Air Th Steam Steel Tr 111 To
In a thermal power plant, a horizontal copper pipe of "D" diameter, "L" length and thickness 1.2 cm enters into the boiler that has the thermal conductivity as 0.37 W/mK. The boiler is maintained at 113C and temperature of the water that flows inside the pipe is at 29C. If the energy transfer (Q) is 118779 kJ in 7 hours. Calculate: 4-Length of the pipe, if D = 0.017 L. 5-Pipe Diameter (in mm)
Question 6 A steel pipe (k = 48 W/m-K) of a heating system carries wet steam at 120 °C. The inner and outer diameters of the pipe are 15 cm and 16 cm respectively. The pipe is insulated on the outside with rockwool insulation (k = 0.05 W/m K) of thickness 8 cm. The ambient air temperature is 32 °C. The outside heat transfer coefficient is 20 W/m2-K. The thermal resistance between the inner pipe surface and the steam is negligible. Calculate the rate of heat flow (in W) from the steam to the ambient over a 5 m length of pipe. Round your answer to 2 decimal places. Add your answer Follow-up question to Question 6, calculate the temperature (in °C) of the outer surface of the insulation. Round your answer to 2 decimal places. Add your answer Follow-up question to Question 6, calculate the rate of condensation of steam (in kg/hr) over the 5-m lenzth of pipe if the latent heat of steam is 2200 k/kg. Rc und your answer to 2 decimal places. Add your answer
3
A thermometric well is placed in a pipe having diameter of 55 mm. Pipe wall temperature is 100°C and heat transfer coefficient inside the pipe is 300 W/m² K. Thickness of thermowell is 1.2 mm and its length is 50 mm. Thermal conductivity of thermowell material. Is 30 W/mK. If the temperature of the gas flowing through the pipe is recorded by thermometer as 200°C, determine the true temperature of gas. If the error in gas temperature is to be reduced by 80% by increasing the length of thermowell, determine the new length of thermowell. Draw a sketch of this thermowell. Take perimeter to area ratio for thermowell as 1/T (T= thickness).
A 20 m metal pipe, with a thermal conductivity of 60 W/(m. K), is carrying pasteurised orange juice with a temperature of 80 °C. The pipe has an inside diameter of 90 mm and a wall thickness of 10 mm. To keep the orange juice at as high a temperature as possible, a 45 mm thick layer of fibreglass insulation is added to the pipe. This fibreglass has a thermal conductivity of 0.02 W/(m. K). If the the temperature outside the pipe is 15 °C, how much heat will be lost from the pipe? Assume that the conditions are steady-state. What is the resistance to heat flow in the metal pipe?: What is the resistance to heat flow in the fibreglass insulation?: What is the overall rate of heat flow from this insulated pipe? KIW W K/W