A 3-in Schedule 40 iron pipeline carries steam at 6 atm gauge. The line is uninsulated and is 70m long. The surrounding air is at 25C. The emissivity of the pipe wall is 0.70. How many kilograms of steam will condense per hour? What percentage of the heat loss is from conduction-convection?

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

A:

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: A duct has a cross sectional area as shown below is used to carry heated water, the external surface…

A: The rate of heat loss by convection and radiation is to be calculated.

Q: A 2-in. Sch. 10 pipe (Steel Type 321) is maintained at an inside temperature of 520 K for a heat…

A: Given details,                     A 2 inch schedule 10  pipe                      inside…

Q: 2) Three materials are connected as the following figure. The heat conductivity coefficient of…

A:

Q: Inner and outer diameters of 12 pipes used in a one shell one pass horizontal condenser are 2.2 cm…

A: Given: Hot fluid: Th = 60 oC mh = 0.045 kg/s hf = 2366 kJ/kg Cold Fluid: Tc1 = 20 oC mc = 6 kg/s…

Q: A loaf of bread having a surface temperature of 373 K is being baked in an oven whose walls and the…

A: Given:  Tb=373 K Ts=477.4 K Emissivity, ε=0.85 height, h = 114.3 mm width, w =114.3 mm length, l…

Q: Estimate the temperature gradient at the surface by convection over a surface of 7.8m2 area if the…

A: The temperature gradient at the surface is to be calculated.

Q: Consider a 1.2-m-high and 2-m-wide glass window whose thickness is 6 mm and thermal conductivity is…

A:

Q: Straight metal fins (k = 45 W/m °C) of triangular profile installed on a 1 m × 1 m wall The wall is…

A:

Q: Composite tube wall:  A thin electrical heater (of negligible size) is inserted between a long…

A: Given that, Inner radius ri = 20 mm = 0.02 Outer radius ro = 40 mm = 0.04 Thermal conductivity of…

Q: A cylindrical tube has inner diameter of 20 mm and outer diameter of 30 mm. Find out the rate of…

A:

Q: An uninsulated pipe passes through a room in which the air and walls are at 30°C. The outside…

A:

Q: The heat loss to the gas if the length of the pipe is 5.0 ? b. The temperature drop due to the…

A:

Q: Consider the cylindrical pipe shown in the figure. Heat is being generated in the pipe wall at a…

A: To find:i. The expression for the temperature distribution in the pipe wall.ii. The heat transfer…

Q: Calculate the natural convection heat transfer coefficient for a vertical stainless pipe, 100 mm…

A: Given, Diameter of pipe, D = 100 mm×1 m1000 mm    = 0.10 m temperature on outside surface of pipe,…

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

A: Assumptions- Thickness = y Convective heat transfer coefficient = h Thermal conductivity of fin…

Q: In this question .. how to get the*** surface area ****of the shape attached  we should use area or…

A:

Q: A steam pipe 8.9 cm o.d. is insulated with a 5.1 cm thickness of magnesia coated with 1.27 cm…

A: Given data: Outer diameter of pipe = 8.9 cm Thickness of magnesia layer = 5.1 cm Thickness of…

Q: Q2-A straight fin of triangular profile is constructed of copper with a thickness of 2.1 mm. The fin…

A: Given: A straight copper fin of triangular profile. Thickness of the fin, t = 2.1 mm = 0.0021 m…

Q: Heat Loss from a Furnace. Two horizontal metal plates having dimensions of 0.8 x 1.0 m comprise the…

A: Given  Metal plate with dimensions  Lenght L = 1 m Width W = 0.8 m Temperature of lower plate T1 =…

Q: Cylindrical surface multilayer Problem: A steam pipe line with inside diameter of 150 mm and outside…

A: From the given diameter we will obtain three radii and name them accordingly. The temperatures are…

Q: A harizantal tube carrying hat water has a surface temperature of 355.4 K and an outside diameter of…

A: Given data: Surface temperature of pipe = 355.4 K Outside diameter of pipe = 25.4 mm Room…

Q: The material to be heated is in a long, cylindrical tube, and is viscous enough that any flow inside…

A: (1) To find the point at which the temperature is 99% of the maximum possible temperature increase,…

Q: After pressure spraying, there is a thin layer of water (at 70°F) left inside of a 24 inch diameter…

A:

Q: 6.32- Consider a wall-mounted power transistor that dissipates 0.18W of power in an environment at…

A:

Q: A 5 cm thick steel pipe, 1.0 m long, with an internal diameter of 8 cm is covered with 4 cm thick…

A:

Q: 400 circumferential fins of rectangular profile (k = 386 W/m °C) are installed on a tube having a…

A:

Q: 1. A 2-in. Sch. 10 pipe (Steel Type 321) is maintained at an inside temperature of 520 K for a heat…

A: A 2 inch schedule 10  pipe  Inside temperature = 520 K  thickness of fireclay insulation layer (x2)…

Q: A gas nside a 25in steel pipe. kness covers the steel pipe. The convective heat-transfer coefficient…

A:

Q: Estimate the natural convection heat transfer coefficient of the horizontal pipe. The outer surface…

A: Outer surface temperature of the horizontal pipe, TS = 120°C =393 K Ambient air temperature, TA =…

Q: Air at 25 ° C blows over the hot steel plate whose surface temperature is maintained at 250 ° C. The…

A: Given data: Dimension of plate=50cmx40cm Thickness of plate=3cm Convective heat transfer coefficient…

Q: Air at 25 ° C blows over the hot steel plate whose surface temperature is maintained at 200 ° C. The…

A: In conduction mode of heat transfer the rate of heat transfer is calculated by the Fourier's law.…

Q: A plane wall has a thermal conductivity of 20 W/(m-K) and generates heat at 0.5 MW/m3. The wall is…

A: Given, Outside temperature, T∞ = 100 °C Thickness of the slab, L = 0.2 m Heat transfer coefficient,…

Q: heat transfer  Adjacent vertical quadrilaterals arranged as in the figure below are black bodies.…

A:

Q: As shown in the figure below, the left end of the cylindrical solid bar (radius: r, thermal…

A: