Heating Air by Condensing Steam. Air is flowing through a tube having an jnside diameter of 38.1 mm at a velocity of 6.71 m/s, average temperature of 449.9 K, and pressure of 138 kPa. The inside wall temperature is held constant at 204.4°C (477.6 K) by steam condensing outside the tube wall. Calculate the heat-transfer coefficient for a long tube and the heat-transfer flux. Ans. h 39.27 W/m? ·K (6.91 btu/h • ft? · °F)

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

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Q: 6) Problem 4.7-6 (Page 350): Natural Convection Heat Loss in Double Window. 4.7-6. Natural…

A: Given that T1 =25 CT2 =10 Ch=2 mw=1.2 m Ra

Q: An aluminium pan whose thermal conductivity is 237 W/m/°C has a flat bottom whose diameter is 20 cm…

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Q: A pot 25 cm in diameter is placed on the stove. The pot is made of stainless plate (k = 15 W / [m °…

A: Given: Thermal conductivity, k = 15 W/m.0C Pan thickness, x = 0.6 cm = 0.006 m Dia of the pan, D =…

Q: Q1) A 20-cm-square plate loses heat with rate of 5000 W/m². Air at 1 atm and 300 K flows across the…

A: Side of the square plate, a = 20 cm = 0.20 m Heat lost from the plate, Q = 5000 W/m2 Air flows at…

Q: As the water flows through a pipe with an inner diameter of 5 cm and a length of 10 m, it heats up…

A: Inner diameter of the pipe, di = 5 cm = 0.05 m Length of the pipe, L = 10 m Initial water…

Q: 2. Heat is transferred steadily in one direction in a composite plane wall that is made of two…

A: The objective of this question is to determine the rate of heat transfer in the system and the…

Q: Question 3 A pipeline is constructed by a proposed material M with thermal conductivity of 0.0015…

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Q: Calculate the overall heat transfer coefficient of steel pipes based on the inner surface. The…

A: Given that, Given that, The inner diameter of the pipe Di = 12.7 cm = 0.127 m The thickness of the…

Q: The energy transfer between the hot fluid and cold fluids is brought about by their complete…

A: We have to answer which type of heat exchanger is used where the hold and cold fluid is direct…

Q: 3. A vertical furnace door, 1 m. in height has a surface temperature of 120°C over which air (30°C)…

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Q: A circumferential fin of rectangular profile has a thickness of 0.7 mm and is installed on a tube…

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Q: A long circular cylinder is encased and centered in a long square cylinder of concrete (k 1.2 W/m·K)…

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Q: It is the transfer of energy as a result of a temperature difference between the system and the…

A: Heat is the transfer of thermal power from a system to its environment or from one object to some…

Q: Steam at 140 ° C flows in a pipe having an inner radius of 45 mm and an outer radius of 55 mm. The…

A: The rate of heat transfer through a pipe is calculated as, Q=Ti-To1Aihi+ln(ro/ri)2πkwL+1Aoho Where,…

Q: Calculate the heat flow every 1.7 hours through the outside fluid film from a 16.2 m² flat vertical…

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Q: Calculate the overall heat transfer coefficient of the steel pipe based on the inner surface. The…

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Q: Water available at 24 C is heated by a heating element having 30 mm outside diameter and 0.4 m…

A: Cp=4180J/kg.∘C k=0.64W/m∘C density(r)=988kg/m3 μ=0.55×10-3N-S/m2 Ts=80∘C length=0.4m do=30mm=0.03m…

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Q: A steam pipe with 80 mm diameter passes through a room at 25°C (both air and walls). The pipe is…

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Q: Air at 2 bar and 40°C is heated as it flows through tube of diameter 30mm at a velocity of 10 m/s.…

A: Given, Pressure P = 2 bar Velocity = 10 m/s

Q: The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe…

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Q: Through a laboratory experiment it was determined that the heat flow through a wall of an unknown…

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Q: A bioengineer working at chemical company intends to dry an insoluble wet granular material in a pan…

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Q: Polymer laminates are formed by “squeezing” two flat sheets of polymer together under high pressure.…

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Q: The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe…

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Q: Q2/ Air at atmospheric pressure and 27 °C is blown across a long 4.0 cm diameter tube at a velocity…

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Q: A 3-inch Sched 40 steel pipe has a thermal conductivity of k = 15 W/m ° C covered with a 2.5 cm…

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Q: A 2.8-mm diameter and 15-m long electric wire is covered with a 2.2-mm layer of insulation having…

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Q: Liquid food is heated in a tubular heat exchanger. The inner pipe wall temperature is 110 ° C. The…

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Q: px 10³ beg 10³

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Q: Water flows through a pipe at an average temperature of 7-50°C. The inner and outer radii of the…

A: Given: The pipe has an inner radius of r1 = 6 cm and outer radius ry = 6.5 cm, The average…

Principal Quantities and EOS

A physical quantity represents the physical state of a system. It is expressed as the product of a number and unit. The basic quantities used in science are length, mass, and time. The principal quantities are the quantities that are independent of other quantities.