43%uo 7:52* ZAIN IQ I.sheet No.3.pdfHomework 01-03 -2021one-dimensional heat transfer and disregarding radiation, determine therate of heat transfer through the wall.Q4/ Steam at Te1-320°C flows in a cast iron pipe (k=80W/m.°C) whoseinner and outer diameters are D =5cm, and D=5.5cm, respectively. Thepipe is covered with 3 cm thick glass wool insulation withk=0.05W/m.°C. Heat is lost to the surroundings at T02=5°C_by naturalconvection and radiation, with a combined heat transfer coefficient to beh,=18W/m.C. Taking the heat transfer coefficient inside the pipe to beh,=60W/m.C, determine the rate of heat loss from the steam per unitlength of the pipe. Also determine the temperature drops across the pipeshell and the insulation.05/ Determine the overall heat transfer coefficient U based on the outersurface of a D=2.5cm, and D=3.34 cm steel pipe (k=54.0W/m.°C) forthe following conditions: inside and outside heat transfer coefficients are1200W/m."C. and 2000W/m."C respectively. If the temperature of innerfluid and outer fluid are 600°C and 300°C, calculate the heat transferthrough one meter length and the temperature of the outer surface.Q6/ A 5-m internal diameter spherical tank made of 1.5cm thick stainlesssteel (k=15W/m. C) is used to store iced water at 0°C. The tank is locatedin a room whose temperature is 20°C. Heat transfer between the outersurface of the tank and the surroundings is by natural convection only.The convection heat transfer coefficients at the inner and outer surfaces ofthe tank are 80W/m.C and 10W/m."C, respectively. Determine the rateof heat transfer to the iced water in the tank and the amount of ice at 0°Cthat melts during a 24-h period. The heat of fusion of water atatmospheric pressure is h =333.7kJ/kg(2)Heat Transfer(Third year)ByDr. Basil Noori Merzah2020- 2021Homework 01-03 -2021Q7/ To reduce frosting it is desired to keep the outside surface of a glazedwindow at 4°C. The outside is at –10°C and the convection coefficient is60 W/m?K. In order to maintain the conditions a uniform heat flux isprovided at the inner surface which is in contact with room air at 22°Cwith a convection coefficient of 12 W/m²K. The glass is 7 mm thick andhas a thermal conductivity of 1.4 W/mK. Determine the heating requiredper m area.

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Q4/ Steam at To1-320°C flows in a cast iron pipe (k-80W/m. C) whose inner and outer diameters are D,-Scm, and D-5.5cm, respectively. The pipe is covered with 3 cm thick glass wool insulation with k-0.05W/m."C. Heat is lost to the surroundings at To2-s°C by natural convection and radiation, with a combined heat transfer coefficient to be h-18W/m. C. Taking the heat transfer coefficient inside the pipe to be h-60W/m. C, determine the rate of heat loss from the steam per unit length of the pipe. Also determine the temperature drops across the pipe shell and the insulation.

Q4/ Steam at To1-320°C flows in a cast iron pipe (k-80W/m. C) whose inner and outer diameters are D,-Scm, and D-5.5cm, respectively. The pipe is covered with 3 cm thick glass wool insulation with k-0.05W/m."C. Heat is lost to the surroundings at To2-s°C by natural convection and radiation, with a combined heat transfer coefficient to be h-18W/m. C. Taking the heat transfer coefficient inside the pipe to be h-60W/m. C, determine the rate of heat loss from the steam per unit length of the pipe. Also determine the temperature drops across the pipe shell and the insulation.

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

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Question #7 Steam at 320°C flows in a stainless steel pipe (k-15W/m K) whose inner and outer diameter are 5cm and 5.5cm respectively. The pipe is covered with 3cm thick glass wool insulation (-0.038W/mK). Heat is lost to the surroundings at 5°C by natural convection and radiation, with a combined natural convection and radiation heat transfer coefficient of h 15W/m² K. Taking the heat transfer coefficient inside the pipe to be happe = outside pipe = 80 W/m²K. (A) Draw the schematic diagram of this problem and label all quantities. (B) Draw the thermal network diagram of this problem and label all thermal resistors and the direction of heat flow. (C) Determine the (i) inner surface area (ii) outer surface area (iii) inner thermal resis- tance (iv) outer thermal resistance (v) thermal resistance across pipe and (vi) thermal resistance across insulation. (D) Determine the total thermal resistance for the unit length of pipe. (E) Determine the rate of heat loss from the steam per unit…
Only need assumptions and fbd
2. Air at 20° blows over a hot plate 50X60 cm made of carbon steel maintained at 220°. The convective heat transfer coefficient is 25W/m²K. What will be the heat loss from the plate in W?
This problem is for us to practice convection coefficient calculation for internal flow. You will have to design a water heating system that will heat up water flowing at 1 kg/s from 10°C to 40°C. You have to chose from two heated ducts - (a) one with rectangular cross-section of 0.6 mx1.2 m and (b) the other with 15 cm diameter circular pipe. Both ducts are maintained at a constant temperature of 60°C. Assuming that the flow is fully devloped in both cases, compare the length required for the two ducts to reach the deasired water temperature. Comment on whether the fully-developed assumption is justifiable in both cases.
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Hello Sir, Good Afternoon.I have a question in my homework related Heat Transfer lesson. The following below is my question. Please Advice, thank you.