Question

A clever student decides to produce and sell windows that
consist of two 5.9-mm thick glass panes ( thermal conductivity of 1
W/m-K) separated by a 0.9-cm thick layer of aerogel, which has a
thermal conductivity of 10^{-4} W/m-K). Assuming the
temperature inside is 19.5˚ C, and the temperature outside is
-4.7˚C, what is the approximate heat loss in units of Watts through
such a window with area 1 m^{2}?

Answer #1

A 2.2 m x 0.94 m x 4.7 cm thick solid wood door has a 0.4 m
square window. The window has two panes of 0.42 cm thick glass with
a 0.2 cm thick space between the glass panes that is filled with
argon. Argon is used since it has a thermal conductivity that is
34% lower than that of air. The inside air temperature is 21 °C and
the outside temperature is -8 °C. Determine the magnitude of the...

A picture window has dimensions of 1.40 m×2.50 m and is made of
glass 5.10 mm thick. On a winter day, the outside temperature is
-15.0 ∘C , while the inside temperature is a comfortable 21.0 ∘C
.
Part B
At what rate would heat be lost through the window if you
covered it with a 0.750 mm-thick layer of paper (thermal
conductivity 0.0500 W/m⋅K)?
**I'm getting 6713 W but it saying im wrong. Please help

Your firm has designed a new 2m double-paned window which
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separated by a 14 mm thick layer of xenon gas with an unknown
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experiment. You use a heater that provides 100 W of heat to
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A 2.1 m x 0.95 m x 5.2 cm thick solid wood door has a 0.5 m
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argon. Argon is used since it has a thermal conductivity that is
34% lower than that of air. The inside air temperature is 18 °C and
the outside temperature is -11 °C. Determine the magnitude of the...

Constants A picture window has dimensions of 1.40 m×2.50 m and
is made of glass 5.80 mm thick. On a winter day, the outside
temperature is -15.0 ?C , while the inside temperature is a
comfortable 20.5 ?C . a)At what rate is heat being lost through the
window by conduction? b)At what rate would heat be lost through the
window if you covered it with a 0.750 mm-thick layer of paper
(thermal conductivity 0.0500 W/m?K)?

On a cold night the temperatures of the two surfaces of a glass
windowpane in a house are 7.8° C on the outer surface and 8.0° C on
the inner surface when the air temperature is 0° C outside and
25.0° C inside. The glass is 2.73 mm thick. (The thermal
conductivity for glass is 0.8 W/m-C°.)
(a) Find the rate at which heat is conducted through the glass
per square meter of window area.
(b) Find the value of...

16a) A triple glazed window consists of 3 clear glass
panes of 4 mm thickness each, separated by two
air cavities of 13 mm each in thickness. The
window area is 1.0 m2
. If the thermal conductivity
of the glass panes is 0.8 W•m-1•K-1 and of the air
cavities is 0.026 W•m-1•K-1 what is the total
thermal resistance of the window?
(A) 2.452 K•W-1
(B) 0.015 K•W-1
(C) 1.015 K•W-1
(D) 6004 K•W-1
16b)A heater provides 305 W of...

1.
Consider a 1.8-m high and 1.5 m-wide double-pane window
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room is maintained at 20°C while the temperature of the outdoors is
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Determine the steady rate of heat transfer through this...

Little Pig's House:
The walls are made of 10-cm thick bricks, insulated with 5 cm
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The floor is thick and well insulated.
The 15-m2 roof is made out of ceramic tiles that are 2.5 cm
thick and insulated with 5-cm thick fibreglass.
The door is 3.5-cm thick solid wood with an area of 2.0
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There are double-paned windows with a combined area of 4.0 m2.
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1. The 4.00mm thick glass windows of an automobile have a
surface area of 2.60m². The outside air temperature is 32.0° C. The
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is 90.0W per square meter degree C.
a. Determine the heat transfer through the windows when the
interior convection heat transfer coefficient is 15 W per meter
squared degree C.
b. By controlling the airflow in the...

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