Question

A certain material has a thermal conductivity of 0.90 W/(m
^{o}C). If the area of a wall made of the material is 20
m^{2}, the thickness of the wall is 0.6 m, and the heat
transfer through that wall by conduction is 400 W, what is the
temperature difference between the surfaces of the wall? Give your
answer in terms of ^{o}C . (Enter the number only -- do not
include the units in your answer.)

Answer #1

A
40-mm-thick plain wall of thermal conductivity 0.04 W/m-K and of
temperature 304 K is exposed to both cold fluid and surroundings
both at 298 K. The cold fluid and wall provide that the heat
transfer coefficient is 10.5 W/m2-K and the emissivity of the wall
is 0.83. Given that the area of the wall is 1.5m2 If the total heat
transferred is 140.6987W, find the temperature of the other side of
the plain wall

71 mm thick horizontal plate made of an opaque material of
thermal conductivity k= 25 W/m-K. At the bottom, water flows at a
temperature of T∞,w = 25C, whereas air flows at the top of the
plate at T∞,a = 710 C having convection coefficient of ha= 71
W/m2-K. Assuming a diffused top of the plate that receives an
irradiated flux of 7100W/m2, of which 30% is reflected back. The
top and bottom surface temperatures are maintained at 43 C...

The thermal conductivity of a sheet of rigid,extruded insulation
is k = 0.020 W/(m*K). The measured temperature difference across a
30-mm-thick sheet of the material is T1-T2=10 C.
a.) Assuming 1-D, steady state conditions withouth thermal
energy generation in the material, what is the heat flux through a
2 m x 3 m sheet of the insulation?
b.) What would be the effect on the rate of heat transfer
through the sheet if a material with a relatively higher thermal...

Consider a cube of density, specific heat, and thermal
conductivity of 2700 kg/m3, 0.896 kJ/kg-K, and 204 W/m-K,
respectively. The cube is 5 cm in length, and is initially at a
temperature of 20 oC. For t>0, two of the boundary surfaces are
insulated, two are subjected to uniform heating at a rate of 10,000
W/m2, and two dissipate heat by convection to an ambient
temperature of 20 oC, with a heat transfer coefficient of 50
W/m2-K.
Assuming lumped capacitance...

A wall in a house contains a single window. The window consists
of a single pane of glass whose area is 0.15 m2 and whose thickness
is 1.9 mm. Treat the wall as a slab of the insulating material
Styrofoam whose area and thickness are 15.00 m2 and 0.110 m,
respectively. Heat is lost via conduction through the wall and the
window. The temperature difference between the inside and outside
is the same for the wall and the window. Of...

Consider a large uranium plate of thickness 5 cm and thermal
conductivity k = 28 W/m K in which heat is generated uniformly at a
constant rate of q˙ = 6 × 10^5 W/m^3 . One side of the plate is
insulated while the other side is subjected to convection in an
environment at 30◦C with a heat transfer coefficient of h = 60 W/m2
K. Considering six equally spaced nodes with a nodal spacing of 1
cm,
(a) Sketch...

8. A copper bar of thermal conductivity 401 W/(m·K) has one end
at 117°C and the other end at 24.0°C. The length of the bar is
0.120 m, and the cross-sectional area is 1.00 × 10−6
m2. If two such bars were placed in series (end to end)
between the same constant-temperature baths, what would the rate of
heat conduction PP be?

consider a 0.8 cm thick steel plate with a thermal
conductivity of 50W/m-k.When the inside surface of the plate is
subjected to a uniform heat flux 0f 5*104 w/m2 the oter surface
temperature of the plate is measured to be 110c under steady
operating condition
a)express the differential equation and the boundary
conditions for steady one dimensional heat conduction through the
wall
b)obtain the relation for the variation of temperature
in the plate by solving the differential equation.
c)evaluate the...

A fin of rectangular profile has a thermal conductivity of 14
W/m C, thickness of 2.0 mm, and length of 23 mm. The base of the
fin is maintained at a temperature of 220 o C while the fin is
exposed to a convection environment at 23 o C with h=25 W/m2 o C.
Calculate heat lost per meter of fin depth for the three tip
conditions. (a) Convection, (b) Adiabatic, and (c) T (x=L) = 23 o
C.

(Heating Transfer)
- A wall with a heat transmission coefficient of 2 W /
mK; thickness, width and height values are all 1 m (wall
thickness 1 m and heat transfer area 1 mx 1 m = 1 m ^ 2) In the
continuous regime, the relevant wall with inner surface temperature
of 2000 K and outer surface temperature of 1000 K , unit Calculate
the heat passing in time.
(Admissions: one dimensional heat conduction and
constant heat conduction coefficient...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 14 minutes ago

asked 59 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago