Question

Concept: What is the benefit of non-dimensionalizing the convective
heat transfer governing equations? - heat and mass transfer
question

Answer #1

What is the heat flux (W/m2) to an object when subjected to
convection heat transfer environment given: 24 °C = the surface
temperature of the object, 82 °C = the bulk temperature of the
fluid adjacent to the object, and the convection heat transfer
coefficient = 49 W/(m^2 K)?
Question 1:
a. 3201
b.
2842
c.
1234
d.
2531

Estimate the convective heat transfer coefficient on the outside
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chilled water pumped around the orange. The velocity of water
around an orange is 0.1 m/s. The surface temperature is 20 C and
the bulk water temperature is 0 C.

Uniform area, heat transfer problem A stove's walls are made up
of a flat inner insulating board 0.01m thick (thermal conductivity:
0.2 W m-1K-1) and a flat outer steel sheet
0.01m thick (thermal conductivity: 26 W
m-1K-1). A mineral-wool (thermal
conductivity: 0.065 W m-1K-1) is placed
between these sheets. The inside temperature of the wall is 773K,
how thick does the insulation have to be to maintain the outside
wall temperature at 323K ? Assume that the ambient air temperature...

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The heat flux, q, is 6000 W/m2 at the surface of an electrical
resistance heater. The heater temperature is 120C when it is cooled
by air at 70C. (a) What is the average convective heat transfer
coefficient, ? (b) What will the heater temperature be if q is
reduced to 2000 W/m2?

5. Heat Transfer: Calculate the heat transferred by the faucet
water to the ice water in #4 above: (a)
Use the following equation: Where, Cwater is the specific heat
capacity of water = 1 cal/(gram oC) mwater is the mass the faucet
water added in #4
(b) ΔT is the temperature change of the water [(#2(a) - #4(b))
temperatures] Calculation: SHOW WORK Result: Q =
____________________ cal Convert the value of Q into joules: (1
calorie = 4.2 joules) Q...

"I don't understand this concept of 'profit realisation' in
relation to non-current assets that have been transferred between
entities within a Group." Provide a response to explain how/why
profit is realised on a non-current asset transfer.

The condenser of a large steam power plant is a heat exchanger
in which steam is condensed to liquid water. Assume the condenser
to be a parallel flow shell-and-tube heat exchanger consisting of a
single shell and 10,000 tubes, each executing two passes. The tubes
are of thin wall construction with D = 30 mm and the steam
condenses on their outer surface. The heat transfer rate that must
be effected by the exchanger is Q = 2 × 10^9...

What are the two interfaces at which heat transfer occurs? Write
formulas for their areas

under what factor does the heat transfer coefficient is
considered to be variable quantity??

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