A 20 mm diameter copper pipe is used to carry heated water, the external surface of the pipe is subjected to a convective heat transfer coefficient of h = 6 W /m*K , find the heat loss by convection per metre length of the pipe when the external surface temperature is 80°C and the surroundings are at 20°C. Assuming black body radiation what is the heat loss by radiation?

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: Radiation heat transfer needs a media to occur where as conduction and convection is not.

A: We have to tell whether radiation heat transfer needs a media to occur.

Q: The inner and outer surfaces of a 0.5-cm-thick 2 m x 3 m window glass in summer are 48°C and 18°C,…

A: Given  Temperature inside wall T1 = 18 oC Temperature outside of wall T2 =48 oC Conductivity of wall…

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: rates of radiation heat transfer

A: In thermal radiation heat transfers from higher temperature  to lower temperature  without the…

Q: 6. In a long rectangle fin, its material has thermal conductivity of 200 w/ m.K and is subjected to…

A:

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

A:

Q: The inner and outer surfaces of a 0.5-cm-thick 2 m x 3 m window glass in summer are 48°C and 18°C,…

A: As per our guidelines, we are supposed to answer only 3 sub parts.

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A:

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

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

A:

Q: The inner and outer surfaces of a 0.5-cm-thick 2 m x 3 m window glass in summer are 48°C and 18°C,…

A: GIVEN THAT  INSIDE TEMPERATURE T1 = 18oC Out side temperature T2 = 48oC Heat trasfer area A = 2×3…

Q: 1-128 A thin metal plate is insulated on the back and ex- posed to solar radiation on the front…

A: Given  Solar radiation incident on plate = 700 w/m2 Absorptivity of plate = 0.7 Temperature of…

Q: Air at 20°C blows over a 50 x 75 cm hot plate made of carbon steel (AISI 1010) with 2 cm thickness.…

A:

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

A: given Temperature of body Tb=373 K Temperature of the surrounding Ts=477.4 K Emissivity e=0.85…

Q: Flue gas at 15 psia and 600 F is flowing across a single tube of an economizer with a velocity of 25…

A: Given data: Pressure of flue gas = 15 psia Temperature = 600 0F Diameter of tube = 4.5 in Velocity…

Q: Problem 1 A concrete wall (plane wall) of 20-cm-thick, is subjected to convection on both sides. In…

A:

Q: For the plane wall shown, solve the conduction equation, deriving an algebraic expression for the…

A: Conduction is a simple heat transfer process in which heat transfers from one end to another end of…

Q: b) A heated sphere of radius R is placed in a large amount of stagnant fluid. Consider the heat…

A: Given:The temperature at the share is constant,So, at r=R, T=TR, and throughout the liquid it…

Q: = 1-D heat transfer.

A:

Q: the total heat loss per metre length of the reactor,

A:

Q: Calculate the heat loss from a double-pane glass window consisting of two pieces af glass, each…

A: Given: The window is made up of a glass of thickness i.e. L1 = L2 = 10 mm or 0.01 m each and in the…

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

A:

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

A:

Q: The circular base, 4 mm thick, of a pan with a diameter of 150 mm can be made of materials with…

A: The thickness of the base of the circular pan=4mm=0.004m Diameter of the base=150mm=0.15m The amount…

Q: coefficient (h). Dreive the critical insulation thickness and explaine the effect of re on the rate…

A:

Q: Steam is being transported in a pipe Outer diameter of the pipe is 8 cm, and the surrounding air…

A: (a) The rate of heat transfer from the pipe to the surroundings is to be determined.

Q: Q2: An electrical hot plate that work ona 800W heater iron plate is exposed to the air at 20°C. The…

A: Given Heat transferred through the electrical hot plate=800 W temp of air=20o C=293 K emissivity of…

Q: Find the rate of heat leakage for a spherical tank 2 m inside diameter and 12 mm thick with thermal…

A: Refer to the figure shown below for the given information in the problem statement:

Q: 1. A 5.2 cm diameter spherical ball whose surface is maintained at a temperature of 71°C is…

A: the total heat transfer would be due to the radiationand convection.

Q: . A glass window of width W = 1 m and height H = 2 m is 5 mm thick and has a thermal conductivity of…

A: Given,the width of the glass window is, The height of the glass window is, The thickness of the…

Q: 1.B.) - A person is in a room with an air temperature of 20°C. The exposed surface area and the skin…

A: From body to air there is radiation and from air to surface of the room there is convection, so will…

Q: The rear window of an automobile is defogged by pass- ing warm air over its inner surface. (a) If…

A:

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

A:

Q: On a hot summer day, a cylindrical beverage can of 7 cm in diameter and 15 cm in length was taken…

A: Given, d= 7cm= 0.07m, r= 0.07/2= 0.035m; h= 15cm= 0.15m. So total surface area =…