A metal rod 1 sq. in. in cross section and 6 in. long is heated at one end and cooled at the other. If the rate of heat input is 3 BTu/hr and the difference in temperature of the two ends is 2 deg. F, what is the coefficient of thermal conductivity in BTU/(hr)(ft²)(⁰F/ft)

A metal rod 1 sq. in. in cross section and 6 in. long is heated at one end and cooled at the other. If the rate of heat input is 3 BTu/hr and the difference in temperature of the two ends is 2 deg. F, what is the coefficient of thermal conductivity in BTU/(hr)(ft²)(⁰F/ft)

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 1.10P: 1.10 A heat flux meter at the outer (cold) wall of a concrete building indicates that the heat loss...

See similar textbooks

Related questions

Q: 2. Determine k, thermal conductivity of a wall if q = 1000 kcal/m? -hr at thickness, k= 33 m 206

Q: A flat wall is exposed to an environmental temperature of 38 oC. The wall is covered with a layer of…

Q: Q1- An exterior wall of a house consists of 10.2 cm brick and 3.8 cm gypsum plaster. What thickness…

Q: Do a quick calculation of the thermal conductance (U value) across a cavity wall consisting of:…

Q: section radius of a bar of metal of length L and uniform coefficient of thermal conductivity k is…

Q: A mechanic needs to remove a tight fitting pin of material A from a hole in a block made of material…

A: GIVEN TOPIC- Thermal expansion of metals A mechanic needs to remove a tight…

Q: A plane wall of an oven with an insulation coating is attached to an insulated wall. The thermal…

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…

Q: 1- A wall 2 cm thick is to be constructed from material that has an average thermal conductivity of…

A: Given data: tw=2cmkw=1.3 W/m°Ckins=0.35 W/m°CTi=1300°CTo=30°C Need to determine the thickness of the…

Q: Two bars A and B, each of length 2m and cross sectional area 1m^2, are placed end to end. Their…

A: Given Thermal conductivity, kA = 339 W/mK kB = 837 W/mK…

Q: want to know how much heat the tube lost due to the material it is made of. Even if it is a small…

Q: What is temperature distribution inside the rod in-terms of "heat generation: g surface…

Q: Convection heat transfer from a plate (2 m x 2 m) is 450 W. If surface temperature of plate is 450 K…

A: Given, Area of plate = A = 2 m x 2 m = 4 m2 Heat transferred = Q = 450 W Surface temperature = Ts =…

Q: A nuclear reactor can be modelled as the plane wall shown in figure below. The thermal conductivity…

A: Given Data The thermal conductivity of wall is: k=12 W/m.K The heat generation rate is:q˙G=106644…

Q: A new 1 ft thick insulating material was recently tested for heat resistant properties. The data…

A: Given Data⇒ Temperature recorded on the cold side Tc=700F Temperature recorded on the hot side…

Q: b) A plane wall is 205 mm thick and area 225 cm2 has a thermal conductivity of 14.86 W/m°C. The…

Q: What is the thermal resistance of a spherical shell with 12 in OD and an internal radius of 5 in.?…

Q: 1. The following figure shows different A and B metal rods connected at one end. T = 90°C A в T, =…

Q: Question 6 A steel pipe (k = 48 W/m-K) of a heating system carries wet steam at 120 °C. The inner…

A: Given: The conductivity of steel pipe is k1=48 W/m·K. The temperature of the steam is T1=120°C. The…

Q: On a winters day the outside temperature of a 15 inch thick concrete wall is -25F, the wall is 16 ft…

Q: Two long rods of the same diameter, one of brass(k= 85 W/mK) and the other of copper (k=375 W/mK)…

Q: See the composite wall in the image below. The width and height of the wall are both 0.12 meters.…

Q: By writing the Fourier heat conduction equation, we can find the meaning of each term in the…

A: Diameter of cylinder, d=25 mm=0.025 m Length of cylinder, L=30 mm= 0.030 m Thermal power, Q=22.4 W…

Q: Activity: compile 1 example for each topic: explain: 1. Conductive heat flow through flat surface…

A: Solution: Note: Dear Student! As per our guidelines, we are only allowed to answer first three…

Q: temperature profile described by the equation T= 5x+100 (K) and a thermal conductivity of k=10…

Q: Imagine having a plane wall of 5 in thickness and 6 ? area with two surfaces that are 2 maintained…

Q: A temperature difference of 85°C is impressed across a fiberglass layer of 13 cm thickness. The…

Q: 2 10 km of steel railroad track are placed when the Temperature is 20°C. The linear coefficient of…

A: Write the initial length of the railroad track. Li=10 km Write the initial temperature of the…

Q: Problem 7 Heat Loss through a Wall Consider a 3 m high, 5 m wide and 0.3 m thick wall whose thermal…

A: As per the guidelines of BARTLEBY we are subjected to solve only one question at a time. Please…

Q: 5) In a resistance microwelding process, the applied voltage is 3.5 V and overall contact resistance…

Q: A thermal efficiency of a cornbustion chamber valued equal to 73.15 % with heat supplied to the…

A: To find : determine the net work done produce . Given : thermal efficiency of a combustion chamber…

Q: 54. A rectangular building is being designed to minimize heat loss. The east and west walls lose…

Q: thickness L= 20 mm with a thermal conductivity k=45 W/m·K has a uniform volumetric heat generation…

Q: 4. Calculate the heat loss per linear foot from a 10.3 in. nominal pipe (outside diameter=10.75 in.)…

A: Heat transfer in hollow cylinder: q˙= ∆TR Where ∆T →Temperature difference R → Thermal resistance…

Q: Find the thermal resistance r (in hr · °F/BTU) and the equivalent R-value (in hr · ft. °F/BTU) of a…

A: Given that, Wall dimension=18'×8'Inside temperature=72 °F,Outside temperature=32 °F,Thickness of…

Q: A slender rod of length L, diameter d (L >> d) and thermal conductivity k1 is joined with another…

A: Given:one Slender rod of length L and thermal conductivity k1Second slender rod of length L and…

Q: Calculate the quantity of heat conducted per minute through a duralumin circular disc 143 mm…

A: Givend=143mm=143×0.00328084 ft=0.46916ftt=46mm=46×0.00328084 ft=0.150919 ft∆T=10oCK=33000…

Q: An exterior wall's insulation is made up of the following materials: 2" cork (K = 0.025; concrete (K…

A: Given:Thickness of cork, L1=2"=212ft=0.1667ftThermal conductivity of cork, K1=0.025…

Q: QUESTION 2 The wall of a refrigerated truck consists of 1.5mm sheet steel outer surface, 10mm…

Q: The heat dissipating capacity of a worm gearbox not depends upon one of following factors…

A: The heat dissipating capacity of a worm gearbox depends upon: Temperature of surrounding air Heat…

Q: Mild steel nails were driven through a solid wood wall consisting of two layers, each 15 mm thick,…

Q: 1.A carpenter builds an exterior house wall with a layer of wood 3.0 cm thick on the outside and a…

A: Given Data: The thickness of the wood, 3.0 cm The thickness of Styrofoam, 2.2 cm Thermal…

Q: Calculate the energy transfer rate across a 6″ wall of firebrick with a temperature difference…

A: Wall thickness, L=6"=612ft=0.5 ftTemperature difference across the wall, ∆T=50oCThermal conductivity…

Q: Thermal Conductivity Problems: a. A wall is made of firebrick 6 inches thick and has a 50°C…

A: GivenPart at=6inch=0.5ft∆T=50oC=(50°C × 9/5) + 32 = 122°F K=0.65BTU/hr-ft-FoPart…

Q: A finned surface has been added to cool an electronic part. The surface temperature of the…

A: Given: Surface temperature of the electronic part (Ts)=60°CAmbient temperature (T∞)=25°C (assumed…

Q: An exterior wall's insulation is made up of the following materials: 2" cork (K = 0.025, BTU hr-ft-F…

Question

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

Similar questions

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.
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.
The thermal conductivity of fibreglass insulation at 67F is 0.02 Btu/h ft F. What is its value in SI units?
As a designer working for a major electric appliance manufacturer, you are required to estimate the amount of fiberglass insulation packing (k = 0.035 W/m K) that is needed for a kitchen oven shown in the figure below. The fiberglass layer is to be sandwiched between a 2-mm-thick aluminum cladding plate on the outside and a 5-mm-thick stainless steel plate on the inside that forms the core of the oven. The insulation thickness is such that the outside cladding temperature does not exceed 40C when the temperature at the inside surface of the oven is 300C. Also, the air temperature in the kitchen varies from 15Cto33C, and the average heat transfer coefficient between the outer surface of the oven and air is estimated to be 12.0W/m2K. Determine the thickness of the fiberglass insulation that is required for these conditions. What would be the outer surface temperature when the inside surface of the oven is at 475C?
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.
1.2 The weight of the insulation in a spacecraft may be more important than the space required. Show analytically that the lightest insulation for a plane wall with a specified thermal resistance is the insulation that has the smallest product of density times thermal conductivity.
Determine k, thermal conductivity of a wall if q = 1000 kcal/m2 -hr at thickness, k = 33 mm and ∆t = 30°C.
What will be the rise in temperature in 30 minutes of a block of copper of 500-gram mass if it is joined to a cylindrical copper rod 20 cm long and 3.0 mm in diameter when a temperature difference of 80 degree Celsius is maintained between ends of the rod? The thermal conductivity of copper is 1.02 cal/cm2-sec-°C/cm (neglect heat losses). Please include FBD
Engineering science An Aluminium bar welded to the bottom of a skillet weigh 1.5 kg. How much heat is needed to raise the temperature of aluminium bar from 250°C to 1700°C, if the specific heat capacity of Al is 0.9 kJ/kg K.
A room has a pine ceiling [ k = 0.12 W/(m•C°) ] that measures 3.0 m x 4.0 m x 2.0 cm. On a cold day, the temperature inside the room is 20°C, and the temperature in the attic above is 8°C. If 6.0 cm of glass wool insulation [ k = 0.042 W/(m•C°) ] were put in above the ceiling, how much energy would be saved in one hour? Please use gresa method
a pipe with an outside diameter of 2.7 inches. insulate with a 2 inches. layer of asbestos (ka = 0.396 btu-in./hr-ft-F), followed by a layer of cork 1.5 inches. thick (kc = 0.30 btu-in/hrft-F). if the temperature of the outer surface of the cork is 91 F, calculate the heat lost per 100 ft of insulate pipe. The temp of the inner surface of the pipe is 275 F.
Two bars A and B, each of length 2m and cross sectional area 1m^2, are placed end to end. Their thermal conductivities are kA = 339 W/mK and kB = 837 W/mK . The left end of bar A is maintained at 373 K while the right end of B is maintained at 273 K. What is the temperature at the interface between A and B?