Assignment 4 ENT319 (Chapter Heat Transfer) Semester I Academic 2021/2022Problem 7 Heat Loss through a WallConsider a 3 m high, 5 m wide and 0.3 m thick wall whose thermal conductivity is k = 0.9 W/m-K (Figure G). On a certain day, the temperature of the innerand the outer surfaces of the wall are measured to 16 °C and 2 °C, respectively. Determine the rate of heat loss through the wall on that day.Wall IWall 2T.T3RaallRons.wwTwwwFigure GRK 85 NMJ33003 ThermofluidPage 7 Assignment 4 ENT319 (Chapter Heat Transfer) | Semester 1 Academic 2021/2022Problem 6 Heat Transfer between Two Isothermal PlatesConsider steady heat transfer between two large parallel plates at constant temperature of T = 300 K and T2= 200 K that are L=1 cm apart, as shown in FigureF. Assuming the surfaces to be black (emissivity ɛ = 1), determine the rate of heat transfer between the plates per unit surface area assuming the gap betweenthe plates is(a) Filled with atmospheric air(b) Evacuated(c) Filled with urethane insulation(d) Filled with superinsulation that has an apparent thermal conductivity of 0.00002 W/m.K.T = 300 KT, = 200 KL=1 cmFigure FRK 85 NMJ33003 ThermofluidPage 6

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

Problem 7 Heat Loss through a Wall Consider a 3 m high, 5 m wide and 0.3 m thick wall whose thermal conductivity is k = 0.9 W/m-K (Figure G). On a certain day, the temperature of the inner and the outer surfaces of the wall are measured to 16 °C and 2 °C, respectively. Determine the rate of heat loss through the wall on that day.

Problem 7 Heat Loss through a Wall Consider a 3 m high, 5 m wide and 0.3 m thick wall whose thermal conductivity is k = 0.9 W/m-K (Figure G). On a certain day, the temperature of the inner and the outer surfaces of the wall are measured to 16 °C and 2 °C, respectively. Determine the rate of heat loss through the wall on that day.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: The temperature distribution across a wall 0.25 m thick at a certain instant of time is T(x) = a +…

Q: On a multi-layered square wall, the thermal resistance of the first layer is 0.005 ° C / W, the…

A: The thermal resistance of first layer is R1=0.005°C/W. The thermal resistance of second layer is…

Q: 12 = 40 cm and 13 = 80 cm, respectively. The leng is 1 meter. The thermal conductivity of the wall…

Q: wo heat reservoirs with respective temperatures of 325 and 275 K are brought into contact by an iron…

A: Given Thermal conductivity, k = 79.5 W/m K Temperature, T1 = 325 K…

Q: Q₁: Consider a large plane wall of thickness L = 0.4 m, thermal conductivity k-2.3 W/m °C, and…

A: Given data:- Plane wall thickness, Thermal conductivity of wall, and its surface area, The left…

Q: Calculate the overall heat transfer coefficient of the steel pipe based on the inner surface. The…

A: Heat transfer is given by Q = U*A*dT = (dT/R ) where R is thermal resistance R = (L/KA) and U is…

Q: A long, thin copper rod 5 mm in diameter is exposed to an environment at 20°C. The base temperature…

Q: Two industrial steel pipes are carrying 200 °C steam. The internal diameter of both pipes are 2.0 cm…

A: First option is correct.

Q: Using A and V as the variables, set up the objective function and constraint to optimize the first…

A: Given:water temperature = T = 250CSolar Energy: 260 W/m2convection coefficient = h = 2…

Q: and k =43 W/m-K, respectively. The time required for the rod to reach 300 °C is seconds.

A: Given data; d=0.01mL=0.2mTi=7500cTa=1000Ch=250 W/m2Kρ=7801 kg/m3Cp=473 j/kgKk=43W/m/kt=300 0c

Q: A pipe of length L connects to thermal reservoirs that are kept constant at temperatures T₁ and T₂.…

A: GivenReservoirs temeprature T1 and T2length of the pipe =Lx=0.2L

Q: uppose that the 10 cm thick concrete wall of a commercial building measures 30 m by 4 m. The energy…

Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

Assignment 4 ENT319 (Chapter Heat Transfer) Semester I Academic 2021/2022
Problem 7 Heat Loss through a Wall
Consider a 3 m high, 5 m wide and 0.3 m thick wall whose thermal conductivity is k = 0.9 W/m-K (Figure G). On a certain day, the temperature of the inner
and the outer surfaces of the wall are measured to 16 °C and 2 °C, respectively. Determine the rate of heat loss through the wall on that day.
Wall I
Wall 2
T.
T3
Raall
Rons.
ww
T
www
Figure G
RK 85 NMJ33003 Thermofluid
Page 7

Assignment 4 ENT319 (Chapter Heat Transfer) | Semester 1 Academic 2021/2022
Problem 6 Heat Transfer between Two Isothermal Plates
Consider steady heat transfer between two large parallel plates at constant temperature of T = 300 K and T2= 200 K that are L=1 cm apart, as shown in Figure
F. Assuming the surfaces to be black (emissivity ɛ = 1), determine the rate of heat transfer between the plates per unit surface area assuming the gap between
the plates is
(a) Filled with atmospheric air
(b) Evacuated
(c) Filled with urethane insulation
(d) Filled with superinsulation that has an apparent thermal conductivity of 0.00002 W/m.K.
T = 300 K
T, = 200 K
L=1 cm
Figure F
RK 85 NMJ33003 Thermofluid
Page 6

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Given data

VIEW

Final solution

VIEW

Trending now

This is a popular solution!

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

1- A solid infinitely long cylinder, radius 2 cm, has uniform internal heat generation. The temperature distribution in the cylinder is T(r) = = 256 – 8.6 x 104 r² where r is in meters, T in °C and the thermal conductivity of the cylinder material is 16 W/ m °C. Determine: (a) The temperature at the centerline. (b) The surface temperature. (c) The heat flux at the surface. (d) The rate of heat transfer to the surrounding per unit meter of cylinder length.
Consider a wall that is 5 m high, 8 m long, and 0.22 m thick. The thermal conductivities of the various materials used, in W/m °C, are kA = kF = 2, kB = 8, kC = 20, kD = 15 and kE = 35. The left and right surfaces of the wall are maintained at uniform temperatures of 300 °C and 100 °C, respectively. If the heat transfer through the wall is one-dimensional, determine (a) the rate of heat transfer through the wall; b) the temperature at the point where sections B, D, and E meet, and c) the temperature drop across section F. Disregard any contact resistances between the interfaces.
A car climbs through a slope of 30° in 5 seconds. If it starts at rest and after 10 m its velocity is 80 km/h. What is the power that the car has to develop? What is the force that produces this power and makes it possible for the car to climb and accelerate? Assume the car does not suffer any temperature change and that its mass is m = 450 kg. d = 10 m 0 - 30°
We have a wall (k = 10 W/mK) with a thickness of 0.4 m. At a certain instance of time temperature distribution is given by T(x) = 50 x²– 450 x + 350. a- Please calculate the rate of heat transfers entering and leaving the wall for a unit surface area and also find the change in the energy storage of the wall. b- If the environment temperature is 85 °C, what is the convection coefficient between the cold surface of the wall and environment.
a. The wall of a building has a surface area of 50 m2. The outside layer of the wall is 20 cm thick concrete with thermal conductivity kcon = .8 W/m-K. The inner layer is 10 cm thick balsa wood (kbalsa = .048 W/m-K) as an insulator. Outside temperatures of 47o C are expected, while an inside temperature of 21o C is maintained by the cooling system. Find the rate of heat transfer through the wall.