Turbine Efficiency

I don't know what "a HYSYS steady state process simulator" is, but if by efficiency you mean shaft power out divided by heat input from burning the LPG, your figures are much too high. I would expect something more like 25% to 35%, depending on size of turbine (bigger tend to be more efficient) and nature of load (steady, fluctuating etc)

Codey

Yes, I have heard of breaking the 50% efficiency line with the newest units but they were in the 200+ megawatt range.

AND they were combined cycle- using waste heat to make steam to drive a turbine parallel to gas turbine. Also- 50% is OK if you can make some very high steam pressures OR use DUAL steam turbines with high and medium pressure inputs.

Very grateful for your response. With all the replies I have had, it seems turbine efficiency is always on the low side.

Thanks for the reply. Appreciate it. seems efficiency is low for turbines compared to compressors.

That's right, because unlike compressors turbines convert heat into mechanical power. Due to the 2^nd law of thermodynamics, even the theoretical maximum efficiency is well below 100%.

thanks

Check out the Power Generators made by Capstand Corporation.

For HYSIS simulations, you need to use the factor given by the manufacturer or the turbine, do not use arbitrary percentages, since they will give an inherent calculation errors.

Most turbine manufacturers will give you their factors if you are serious about buying their equipment.