QI/ The inner and outer surfaces of a 5-m 6-m brick wall of thickness 30 cm and thermal conductivity 0.69 W/m °C are maintained at temperatures of 20°C and 5°C, respectively. Determine the rate of heat transfer through the wall, in W. Answer: 1035 W Brick wall 20 C S°C 30 cm

QI/ The inner and outer surfaces of a 5-m 6-m brick wall of thickness 30 cm and thermal conductivity 0.69 W/m °C are maintained at temperatures of 20°C and 5°C, respectively. Determine the rate of heat transfer through the wall, in W. Answer: 1035 W Brick wall 20 C S°C 30 cm

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.19P: 1.19 A cryogenic fluid is stored in a 0.3-m-diameter spherical container is still air. If the...

See similar textbooks

Related questions

Q: A 5-m·diameter spherical tank is filled with liquid oxygen (p = 1141 kg/m cp =1.71 kJ/kg-°C) at -…

Q: Q2. The inner and outer surfaces of a 6-m x 6-m brick wall of thickness 30 cm and thermal…

Q: A large plane wall is subjected to specified heat flux and temperature on the left surface and no…

A: The heat flux through a plane wall in one-dimensional steady heat conditions can be calculated using…

Q: A 278-ft-long section of a steam pipe whose outer diameter is 4 inches passes through an open space…

Q: Q1.1 : The inner and outer surfaces of a 5-m x 6-m brick wallof thickness 30 cm and thermal…

A: Given: The temperature at the inner surface of the wall is Ti=20°C, The temperature at the outer…

Q: 1-88 Consider a 20-cm-thick granite wall with a thermal con- ductivity of 2.79 W/m-K. The…

Q: Q) An apple has been put into a freezer at (-18°C) to be cooled. Initially, the apple is at a…

Q: The inner and outer surfaces of a 5-m x 6-m brick wall of thickness 30 cm and thermal conductivity…

Q: Q) An apple has been put into a freezer at (-23°C) to be cooled. Initially, the apple is at a…

A: Given:- Surrounding temperature, T∞=-23°C=250K Initial temperature of apple, Ti=15°C=288K…

Q: The inside and outside surfaces of a 1-cm thick, 4-m squared-shaped

A: Given data⇒ Thickness (t)=1 cm=0.01 m Side of square(a)=4 m Inside temperature T1=90C=9+273T1=282 K…

Q: The temperature at the inner and outer surfaces of a boiler wall made of 20 mm thick steel and…

Q: Q) An apple has been put into a freezer at (-23°C) to be cooled. Initially, the apple is at a…

A: Given data:- Surrounding temperature, T∞=-23°C=250K Initial temperature of apple, Ti=15°C=288K…

Q: The inner and outer surfaces of a 5-m x 6-m brick wall of thickness 30 cm and thermal conductivity…

Q: A house has a composite wall of plywood, fiberglass insulation, and plaster board, as indicated in…

A: A) ASSUMPTIONS: (1) One-dimensional conduction, (2) Steady-state conditions, (3) Negligible contact…

Q: A wall of length "L" m and height "H" m is made from a thick bricklayer of 38 cm with thermal…

Q: A circuit board houses on its surface 120 closely spaced logic chips, each dissipating 0.12 W. If…

A: Solution:-Each Chip dissipates = 0.12WTotal Number of chip = 120Heat disripates during = 10-hr(a)…

Q: Calculate the convection heat transfer coefficient value on the outer surface of the insulation to…

A: The environment air temperature is, T0=30°C The thickness of the insulating material is, L=4 cm The…

Q: 1.)For heat transfer purposes, a standing man can be modeled as a 34.17-cm-diameter, 173.37-cm-long…

Q: Hot air at 80°C is blown over a 2-m x 4-m flat surface at 30°C. If the convection heat transfer…

A: Given, Temperature of surface = TS = 80 oC Area of surface = 2 m x 4 m = 8 m2 Air temperature = T∞ =…

Q: A 12-cm × 18-cm circuit board houses on its surface 100 closely spaced logic chips, each dissipating…

A: Given information: The area of the circuit board, The number of chips = 100 The environment…

Q: Consider a large plane wall of thickness L = 0.4 m, thermal conductivity k = 2.3 W/m · °C, and…

A: Concept Of Heat Transfer Used

Q: A solid plate, with a thickness of 15 cm and a thermal conductivity of 80 W/m-K, is being cooled at…

Q: A circuit board houses on its surface 120 closely spaced logic chips, each dissipating 0.12 W. If…

Q: The roof of an electrically heated home is 9 m long, 12 m wide, and 0.50 m thick, and is made of a…

A: GIVEN DATA - AREA OF ROOF A=9*12m2 THICKNESS dx=0.50m Thermal conductivity k=0.8W/m'C T1=25'C T2=5'C…

Q: A large plane wall has a thickness of 0.4 m, thermal conductivity k= 2.3 W/m. °C, and surface area…

A: Given:Thickness, t=0.4 mK=2.3 W/m°CA=30 m2Left side wall temperature, TL=90°CT∞=25°Ch=24 W/m2°C

Q: Q5: Consider a large plane wall of thickness L = 0.4 m, thermal conductivity k=2.3 W/m- "C, and…

Q: 16. The roof of an electrically heated home is 6 m long, 8 m wide, and 0.25 m thíck, and is made of…

A: a.

Q: (b) The inner and outer surfaces of a 25-cm-thick wall are at 27 C and 45 C, respectively. The outer…

Q: . Consider a person standing in a room at 25°C. Determine the total rate of heat transfer and the…

Q: EXAMPLE 1 Aspherical container of inner radius rl = 2 m, outer radius r2 = 2.1m, and thermal…

A: Given: The inner radius of container, r1 = 2 m The outer radius oof container, r2 = 2.1 m The…

Q: QI/A 5-cm-external-diameter, 10-m-long hot water pipe at 80°C is losing heat to the surrounding air…

Q: Question 1.1: The inner and outer surfaces of a 5-m x 6-m brick wallof thickness 30 cm and thermal…

A: Outer temperature = 20C Inner diameter = 5C Area = 30 m2 Thickness = 30 cm thermal conductivity =…

Q: (A) Choose the right answer 1.The temperature profile for heat conduction through a wall of constant…

Q: A cat has a body temperature of 48 ºC. She stays inside a closed air conditioned room that has an…

A: Find the heat loss per unit area from the cate

Q: 700 W/m3 electrical heat is generated in a large plane wall whose one side is insulated while the…

Q: The inner and outer surfaces of a 5-m × 6-m brick wall of thickness 30 cm and thermal conductivity…

A: Given data A=30 m2∆x=0.3 mk=0.69 W/m°cT1=20 °cT2=5 °c

Q: A 20-cm diameter copper ball is to be heated from 110°C to an average temperature of 170°C in 90…

Q: A wall of length "L" m and height "H" m is made from a thick bricklayer of 26 cm with thermal…

Q: A 1500-W iron plate has a thickness of 3 mm, cross-sectional area of 320 cm^2 . The room convection…

A: Given, Q=1500 W, t=3 mm, A=320 cm2=320×10-4 m2h=25 W/m2.K, T∞=23 °C, T1=950 °C, T2=300 °Cρ=2850…

Q: A plane wall 3.5 cm thick generates heat internally. The wall is made of a material with thermal…

Q: A thermal window consisting of two panes of 0.25" glass (R-value 0.08 hr · ft2. °F/BTU each),…

A: Given: Glass: t = 0.25 in R = 0.08 hr.ft2F/BTU Air: t = 0.75 in Find: R value in summer and winter

Q: Q3/ The north wall of an electrically heated home is 20 ft long, 10 ft high, and 1 ft thick, and is…

Q: Question 2:A circuit board houses on its surface120 closely spaced logic chips, each dissipating…

A: closely Logic chips = 120 Heat dissipation, Q = 0.12 W Heat transfer is negligible Area of the…

Q: In a warm room, a naked resting person has a skin temperature of 33°C If the room temperature is…

A: skin temp = 33°C =33+273=303Kroom temp=29°C =29+273=302Kbody surface area=1.5m2heat transfer…

Q: Refractory bricks are used as linings for furnaces, and they generally have low thermal conductivity…

A: Given data Thermal conductivity of the furnace wall lining K=1 W/mK Thermal diffusivity = 5.08 *…

Q: furnace is constructed with 20 cm of firebrick (k=1.36 W/m-K), 10 cm of insulating brick (k=0.26…

Q: A constant heat flux comes to the x = 0 surface of a plane wall with a thickness of 25 cm and a heat…

Q: A circuit board houses on its surface 120 closely spaced logic chips, each dissipating 0.12 W. If…

A: Given data: The number of the chip, n = 120. The power dissipated by each chip, P = 0.12 W. The…

Q: The inner and outer surfaces of a 0.5-cm-thick 2-m by 2-m window glass in winter are 10°C and 3°C,…

Concept explainers

Forms of Energy

Energy is described as the capability to accomplish a task, like the ability to push a block by applying force on it. It is a quantitative property that is used to accomplish work on an object.

Question

Transport phenomena

Q1/ The inner and outer surfaces of a 5-m_ 6-m brick wall of thickness 30 cm and
thermal conductivity 0.69 W/m °C are maintained at temperatures of 20°C and
5°C, respectively. Determine the rate of heat transfer through the wall, in W.
Answer: 1035 W
Brick
wall
20°C
5°C
30 cm

Exchange of mass, energy, charge, momentum, and angular momentum between observed and studied systems. Mass, momentum, and heat transport all share a very similar mathematical framework, and the parallels between them are exploited in the study of transport phenomena in various disciplines, including chemical engineering.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A plane wall 15 cm thick has a thermal conductivity given by the relation k=2.0+0.0005T[W/mK] where T is in kelvin. If one surface of this wall is maintained at 150C and the other at 50C, determine the rate of heat transfer per square meter. Sketch the temperature distribution through the wall.
A high-speed computer is located in a temperature-controlled room at 26C. When the machine is operating, its internal heat generation rate is estimated to be 800 W. The external surface temperature of the computer is to be maintained below 85C. The heat transfer coefficient for the surface of the computer is estimated to be 10W/m2K. What surface area would be necessary to assure safe operation of this machine? Comment on ways to reduce this area.
Discuss the modes of heat transfer that determine the equilibrium temperature of the space shuttle Endeavour when it is in orbit. What happens when it reenters the earths atmosphere?
1.10 A heat flux meter at the outer (cold) wall of a concrete building indicates that the heat loss through a wall of 10-cm thickness is . If a thermocouple at the inner surface of the wall indicates a temperature of 22°C while another at the outer surface shows 6°C, calculate the thermal conductivity of the concrete and compare your result with the value in Appendix 2, Table 11.
A steam pipe 200 mm in diameter passes through a large basement room. The temperature of the pipe wall is 500C, while that of the ambient air in the room is 20C. Determine the heat transfer rate by convection and radiation per unit length of steam pipe if the emissivity of the pipe surface is 0.8 and the natural convection heat transfer coefficient has been determined to be 10 W/m2K.
1.37 Mild steel nails were driven through a solid wood wall consisting of two layers, each 2.5-cm thick, for reinforcement. If the total cross-sectional area of the nails is 0.5% of the wall area, determine the unit thermal conductance of the composite wall and the percent of the total heat flow that passes through the nails when the temperature difference across the wall is 25°C. Neglect contact resistance between the wood layers.
1.29 A spherical interplanetary probe with a 30-cm diameter contains electronic equipment that dissipates 100 W. If the probe surface has an emissivity of 0.8, what is its surface temperature in outer space? State your assumptions in the calculations.
1.19 A cryogenic fluid is stored in a 0.3-m-diameter spherical container is still air. If the convection heat transfer coefficient between the outer surface of the container and the air is 6.8 , the temperature of the air is 27°C, and the temperature of the surface of the sphere is –183°C, determine the rate of heat transfer by convection.
The heat transfer coefficient between a surface and a liquid is 57 W/(m2K). How many watts per square meter will be transferred in this system if the temperature difference is 10C?
The heat transfer across a 5" wall of firebrick is 500 W/m2. If the surface temperature thermalconductivity of brick is 0.7 Btu/hr-ft-°F, find he on cold side is 30°C and temperature on hot side. O 65.37 deg C 87.25 deg C 73.45 deg C 82.41 deg C
Q: A large plane wall of thickness (L= 0.3 m), thermal conductivity (k = 40 W/m-°C), and surface area 0.4 m2. The left side of the wall is maintained at a constant temperature of 70°C while the right side loses heat to the surrounding air with heat flux q' expressed by: 1200k q = k+20L A- Find a relation to determine the variation of temperature in the wall. B- Determine the rate of heat transfer through the wall. C- Determine the temperature at the right side of the wall. wall T1= 70 °C L= 0.3m
Consider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = 40 W/m-K and a thickness L = 0.3 m, with no internal heat generation. T1 -T2 L Determine the heat flux, in kW/m?, and the unknown quantity for each case. Case T1(°C) T2(°C) dT/dx(K/m) q (kW/m?) 1 50 -20 -233.333 9333.32 2 -30 -10 66.667 75466.67 3 70 117.85 160 6400 4 63.85 40 -80 3200 5 -30.15 30 200 8000