Efficiency calculation of single-stage back-pressure steam turbines

Thread Content

Dear experts and seniors: I am currently working on an energy consumption analysis, focusing on an air compressor driven by a single-stage back-pressure turbine. The parameters for the fresh steam are 31 t/h, 295°C, and 1830 kPaG, while the parameters for the back-pressure steam are 144°C and 216 kPaG. I would like to know how to calculate the energy carried by the steam at the inlet and outlet, as well as how to determine the efficiency That’s what I think. Do you all agree? The steam energy at the inlet consists of two components: internal energy and pressure energy. Internal energy is easy to calculate, as steam with specified parameters has a enthalpy value that can be used for calculation. But how can pressure energy be calculated? Is there anyone among you who can give some guidance? I would be extremely grateful