Question 6A steel pipe (k = 48 W/m-K) of a heating system carries wet steam at 120 °C. The inner and outerdiameters of the pipe are 15 cm and 16 cm respectively. The pipe is insulated on the outside withrockwool insulation (k = 0.05 W/m K) of thickness 8 cm. The ambient air temperature is 32 °C. Theoutside heat transfer coefficient is 20 W/m2-K. The thermal resistance between the inner pipe surfaceand the steam is negligible. Calculate the rate of heat flow (in W) from the steam to the ambient over a5 m length of pipe.Round your answer to 2 decimal places.Add your answerFollow-up question to Question 6, calculate the temperature (in °C) of the outer surface of theinsulation.Round your answer to 2 decimal places.Add your answerFollow-up question to Question 6, calculate the rate of condensation of steam (in kg/hr) over the 5-mlenzth of pipe if the latent heat of steam is 2200 k/kg.Rc und your answer to 2 decimal places.Add your answer

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

Answered: Question 6 A steel pipe (k = 48 W/m-K)…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A 4-mm and 2-m-long electric wire is tightly wrapped with a 2-mm-thick plastic cover whose thermal conductivity is k =0.1 W/m-°C. Electrical measurements indicate that a current of 10 A passes through the wire and there is a voltage drop of 10 V along the wire. If the insulated wire is exposed to a medium at =20 °C with a heat transfer coefficient of h=10 T. W/m2.°C, determine the temperatures T1 and T2 as shown in the figure below. Also determine whether doubling the .thickness of the plastic cover will increase or decrease T2 T
Question 4 The window of a room is made of 5 mm thick glass which has a thermal conductivity of 1.4 W/m-K. A heater is used to maintain the room temperature at 22 °C. Take the convection heat transfer coefficients on the outer surface of the window to be 12 W/m²-K. Take appropriate assumptions while solving this problem. (a) T₁=15°C TA -A- 1m x 3m = 3m², k=1.4W/m-K -T₂=5°C L=0.005m Figure Q2 Determine the heater thermal load to maintain the room temperature?
A 1,155 ft², 4 in. thick concrete wall has inside and outside surface temperatures of 24°C and 4°C. A 2 in. insulation batt with a thermal conductivity of k= 0.03 Btu/(h. ft. °F) is added to the wall. Determine the reduction in heat transfer rate. What is the thickness of the insulation in meters? 0.0508 x Your response differs from the correct answer by more than 10%. Double check your calculations. m What is the thermal conductivity value of the insulation batt in W/(m. K)? 0.05188 W/(mK) What is the R-value of the concrete wall (in m². K/W)? 0.022578 X Your response differs from the correct answer by more than 10%. Double check your calculations. m². K/W What is the R-value of the insulation batt (in m² K/W)? 1.9584 X Your response differs from the correct answer by more than 100%. m² K/W What is the heat transfer rate (in W) when the insulation is added? X W What is the percent reduction in the heat transfer rate? 96 x %
A 1-in Sch 40 stainless steel pipe with a thermal conductivity of 45 W/m-K can move 1,000 kg of saturated steam per hour at 150 °C. Refractory material 0.25 inches thick with a thermal conductivity of 0.025 W/m-K insulates the pipe. At a temperature of 25 °C, the pipe is exposed to the outside air. There is a 1135 W/m2 internal heat transfer coefficient.40 W/m2-K is the outside heat transfer coefficient, whereas -K. Suppose that only the radial direction is involved in steady-state heat transfer and that radiation effects are negligible. ✓ Determine how much heat is being lost through these pipes to the environment.a. 399.1 W/mb. 1525.0 W/mc. 618.4 W/md. 1128.7 W/me. none of the above √ How about the insulated pipe's surface temperature?a. 118.5 °Cb. None of the abovec. 101.5 °Cd. 216.3 °Ce. 292.2 °C
Approximately 106 discrete electrical components are placed on a single integrated circuit (chip) with electrical heat dissipation of q = 30,000 W/m². The chip, which is very thin, is exposed to a dielectric liquid at its outer surface, with ho = 450 W/m²/K and To= 20°C, and is joined to a circuit board at its inner surface. The thermal contact resistance between the chip and the board is R = 104 m² K/W, and the board thickness and thermal conductivity are L = 4 mm and 00,0 kb = 0.95 W/m/K, respectively. The other surface of the board is exposed to ambient air for which hi = 30 W/m²/K and T = 20°C. a) Provide a resistance diagram labeling appropriate variables associated with this problem. b) Determine a symbolic expression for the temperature of the chip T. c) Calculate the chip temperature for the given parameters. Coolant ho 00,01 Air Too,i hi 三三 -Chip q Te -Thermal contact resistance, Re -Board, kp
Calculate the heat loss through a 100-ft² wall with an inside temperature of 65°F and an outside temperature of 35°F. Assume the exterior wall is composed of 2- in. of material having a 'k' factor of 0.80, and 2-in. of insulation having a conductance of 0.16. RTotal = 8.75 & Q = 342-Btu/hr RTotal = 9.2 & Q = 399-Btu/hr RTotal = 8.75 & Q = 399-Btu/hr RTotal = 9.2 & Q = 342-Btu/hr Hide hint for Question 3 Utilize the (RTotal = 1/C + x1/k1) equation.
Water flows through a cast steel pipe with k = 53 W/m-K with an outer diameter of 110 mm and 3.5 mm wall thickness. Calculate the thickness of insulation to be lagged on the pipe if the heat transfer per unit length is 6.5 W/m. The thermal conductivity of the insulation is 0.045 W/m-K. The water temperature is 15°C with convective heat transfer coefficient of 30 W/m2 -K while the outside air is -8°C and 18 W/m2 -K.
A thick-walled tube of stainless steel with thermal conductivity k=19 W/m°C has inner diameter of 10 cm and outer diameter of 30 cm covered with 5 cm layer of asbestos insulation with thermal conductivity k= 0.2 W/m°C. If the inside of the pipe and outside of insulator temperature is maintained at 600°C and 107°C respectively. Determine the heat loss per meter length of pipe and the tube-insulation interface temperature.

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS