Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN: 9781305387102
Author: Kreith, Frank; Manglik, Raj M.
Publisher: Cengage Learning
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Chapter 2, Problem 2.52P
To determine
The rate of heat flow.
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Hi, kindly solve this problem and show the solution. Thank you
The below shown graph is drawn from the
tabulated values of brass which we measured
during the experiment of thermal
conductivity: (Consider the value of heater
power (Q') and the area of cross section (A)
of the material from the tabulated values)
X-axis 1 unit = 1cm
vaxis 1 unit s'c
70-
20-
10-
Distance of the test point from the hot end in centimeter
Calculate the following:
Thermal conductivity of
brass
Calculated
Value
quantities
Difference in temperature (AT)
C° (with sign)
Difference in distance between
test points (Ax) cm
Slope from the graph °C/m
(with sign)
Thermal conductivity of brass
kp W/m°C
Calculate the heat transferred from the cube-shaped iron mass (a = 30 cm) to the environment at 20 ° C with all surfaces at a temperature of 100 ° C. (Assume that the heat is only from the surfaces, the inner parts of the surfaces are insulated.)
Chapter 2 Solutions
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Ch. 2 - A plane wall, 7.5 cm thick, generates heat...Ch. 2 -
2.2 A small dam, which is idealized by a large...Ch. 2 - 2.3 The shield of a nuclear reactor is idealized...Ch. 2 - A plane wall 15 cm thick has a thermal...Ch. 2 - 2.5 Derive an expression for the temperature...Ch. 2 - A plane wall of thickness 2L has internal heat...Ch. 2 - 2.7 A very thin silicon chip is bonded to a 6-mm...Ch. 2 - 2.9 In a large chemical factory, hot gases at 2273...Ch. 2 - 2.14 Calculate the rate of heat loss per foot and...Ch. 2 - 2.15 Suppose that a pipe carrying a hot fluid with...
Ch. 2 - Prob. 2.16PCh. 2 - Estimate the rate of heat loss per unit length...Ch. 2 - The rate of heat flow per unit length q/L through...Ch. 2 - A 2.5-cm-OD, 2-cm-ID copper pipe carries liquid...Ch. 2 - A cylindrical liquid oxygen (LOX) tank has a...Ch. 2 - Show that the rate of heat conduction per unit...Ch. 2 - Derive an expression for the temperature...Ch. 2 - Heat is generated uniformly in the fuel rod of a...Ch. 2 - 2.29 In a cylindrical fuel rod of a nuclear...Ch. 2 - 2.30 An electrical heater capable of generating...Ch. 2 - A hollow sphere with inner and outer radii of R1...Ch. 2 - 2.34 Show that the temperature distribution in a...Ch. 2 -
2.38 The addition of aluminum fins has been...Ch. 2 - The tip of a soldering iron consists of a 0.6-cm-...Ch. 2 - One end of a 0.3-m-long steel rod is connected to...Ch. 2 - Both ends of a 0.6-cm copper U-shaped rod are...Ch. 2 - 2.42 A circumferential fin of rectangular cross...Ch. 2 - 2.43 A turbine blade 6.3 cm long, with...Ch. 2 - 2.44 To determine the thermal conductivity of a...Ch. 2 - 2.45 Heat is transferred from water to air through...Ch. 2 - 2.46 The wall of a liquid-to-gas heat exchanger...Ch. 2 - Prob. 2.47PCh. 2 - The handle of a ladle used for pouring molten lead...Ch. 2 - 2.50 Compare the rate of heat flow from the bottom...Ch. 2 - 2.51 Determine by means of a flux plot the...Ch. 2 - Prob. 2.52PCh. 2 - Determine the rate of heat transfer per meter...Ch. 2 - Prob. 2.54PCh. 2 - 2.55 A long, 1-cm-diameter electric copper cable...Ch. 2 - Prob. 2.56PCh. 2 - Prob. 2.57PCh. 2 - Prob. 2.58P
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- **19. ssm Two cylindrical rods are identical, except that one has a thermal conductivity k and the other has a thermal conductivity k2. As the drawing shows, they are placed between two walls that are maintained at different temperatures Tw (warmer) and Te (cooler). When the rods are arranged as in part a of the drawing, a total heat Q' flows from the warmer to the cooler wall, but when the rods are arranged as in part b, the total heat flow is Q. Assuming that the conductivity k, is twice as great as k, and that heat flows only along the lengths of the rods, determine the ratio Q'/Q. k1 k2 Tw k2 Tc Tw Tc (a) (b)arrow_forwardShow detailed step by step solution. Topic: Thermodynamicsarrow_forwardP-6 Please I need help with this question needed very clearly and step by step explanation and needed with clear handwriting please, will be really appreciated for your helparrow_forward
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