4) A common "assumption" in steam power cycle analysis is that the steam generator vaporization process occurs at constant temperature and pressure. In this problem observe what happens if the mass

flowrate (and average flow velocity) gets just a bit too large. Consider a SSSF of a liquid-vapor mixture of "wet steam" being heated as it flows through a constant area tube (for example as part of a steam generator). The upstream state static pressure is 1000 kPa (100,000 Pa) with a quality, x₁,= 10%, at an average flow velocity, V₁ = 30 m/s. Use the sat. pressure data in the EXCEL steam table on Bboard. Assume friction is negligible. Tabulate State (2) the results for each pressure entry (1000, 950, 900, 850 kPa...). Determine the exit state (p2. T2, X2, V2, h2, 82, V₂, a2, M₂) and the specific heat transfer, 192 (kJ/kg) and entropy production (162/m kJ/kg-K. Clearly mark the admissible and inadmissible ranges. Explain why the steam temperature decreases in this case as heat is added! Explain why there is a limit on the maximum heat transfer. Notice that the vaporization process is only partially complete. For p₁ = 1000 kPa, T₁ = 179.9 °C, x₁ = 0.10, V₁ = 30 m/s. M₁ = 0.272, the max. achievable heat transfer, q* =_ kPa, T₂= °C, X₂= V/₂= m/s and M₂ = kJ/kg occurs at = -"