Question

The performance of a nozzle with inlet area of 800cm^2 operating at steady state is to be investigated. When steam flows in at 2.5 m^3/s, 1200C and 5 MPa, the exit velocity was observed be 100m/s. to investigate the nozzle's performance, steam will be made to flow in at various rates while maintaining the same inlet temperature and pressure. select two different values of inlet velocities in the range of 15 to 30m/s and subsequently plot the exit enthalpy in kJ/kg as a function of exit velocity for these two cases

Question 2 The performance of a nozzle with inlet area of 800 cm² operating at steady state is to be investigated. When steam flows in at 2.5 m/s, 1200 °C and 5 MPa, the exit velocity was observed to be 100 m/s. To investigate the nozzle's performance, steam will be made to flow in at various rates while maintaining the same inlet temperature and pressure. Select two (2) different values of inlet velocities in the range of 15 to 30 m/s and subsequently plot the exit enthalpy in kJ/kg as a function of exit velocity for these two cases. [10 MARKS]

Answer 1

nozzle with inlet area of Giveni The performance of a A = 800 m operating at steady starce. steam flow rate, g = 2.5 m 10 Temperature, T= 1200°C, pressure, p=smpa erit velocity was observed, ve = 100 ms two different values of inlet velocities in the range of LIE to 30 assume, = 20 m/s and Y₂ = 27 m/s. mis) at from steam table p=5mpe T= 1200°C, enthalpy, h = 51413 kilka when, Vi= 20mla from steady flow energy equation. ht +92₂ where subscript inter 2 ear ms + 92 = h + V₂² at some level 2,522) h + v = hz + بما h = ht 2600 ha 17 51413 + V 2600 2000 har 5136.3 + V2 2000 علی can see Here in equation o exit enthalpy is the oth of inlelt velocity : 5136.5 kolleg how, when, Y- 20m/s, ha 1/2 = 27 m/s 5136 66 K 1kg (kolicy) exit enthalpy! the) ha = 1 inice mincity In