GATE ME 2016 Set 3 — Question 54
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Thermodynamics → Laws & Properties → Zeroth & First Laws
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Question
Steam at an initial enthalpy of and inlet velocity of , enters an insulated horizontal nozzle. It leaves the nozzle at . The exit enthalpy (in kJ/kg) is __________
Correct answer
84 to 86
Solution
For a steady-flow process in an insulated horizontal nozzle, we apply the Steady Flow Energy Equation (SFEE):Given:
Rearranging for the exit enthalpy :
Substituting the values (, , ):
Note: . To keep in kJ/kg, we divide the kinetic energy term by .
The exit enthalpy is .
- Insulated nozzle:
- Horizontal nozzle:
- No external work:
Rearranging for the exit enthalpy :
Substituting the values (, , ):
Note: . To keep in kJ/kg, we divide the kinetic energy term by .
The exit enthalpy is .
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