Question

Question 4. Methane enters a 4.2 cm ID pipe at 45°C
and 12 bar with an average velocity of 7

m/s and emerges at a point lower than the inlet at constant
temperature and 9 bar,

i. Calculate the change in Kinetic energy rate, assuming that the
methane behaves ideal gas.

ii. If the heat loss is estimated to be 45 W, calculate the change
in height between the inlet

ad outlet, assuming the change of internal energy is negligible

g=9.81 m/s2

Answer #1

1) A nozzle is a device for increasing the velocity of a
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the enthalpy of the fluid is 3025 kJ/kg and the velocity is 60 m/s.
At the exit from the nozzle the enthalpy is 2790 kJ/kg. The nozzle
is horizontal and there is negligible heat loss from
it.
(i) Find the velocity at the nozzle exit.
(ii) If the inlet area is 0.1 m2 and specific volume...

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Select one:
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c. 50 °C
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Steam at 0.8 MPa and 500 ºC is throttled over a well insulated
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