The discussion centers on the feasibility of turbine exhaust temperatures reaching below zero Celsius, specifically referencing calculations yielding 176 K under inlet conditions of 7.8 MPa and 625 K, with an exit pressure of 1 atm (100 kPa). Participants highlight the importance of sharing calculations for clarity, noting that the working fluid is a van der Waals gas rather than an ideal gas. The conversation emphasizes the need for transparency in problem-solving to facilitate better understanding and collaboration.
PREREQUISITESEngineers, thermodynamics students, and professionals involved in turbine design and performance analysis will benefit from this discussion.
Instead of making us guess, why don't you post your calculations?Albertov123 said:Could turbine exhaust temperature be negative celsius?
My calculations yield 176 K. Is that possible?
Inlet conditions are 7.8 MPa and 625 K. Exit pressure is 1 atm. (100 kPa.)
CWatters: The OP posted his calculations before this thread was moved to the HW forum, then the calculations disappeared from the thread. As far as I can recall, the working fluid was a van der Waals gas rather than an ideal gas, with certain values given for the constants in the vdW equation of state.CWatters said:Is this a steam turbine?
PS: Check out the forum rules for the homework sections.