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Jim Watts on Increasing Turbine out Pressure and its effect

By: Jim Watts [764] 5 Stars
Date: Monday, April 23, 2018
Time: 2:29:44 AM

Not a very enlightening response from the OEM.
Feasible is just about as low as you can go before saying impossible.
But if I were an OEM I would probably say the same as it prepares you to spend big to get what you want.

You have not indicated the turbine manufacturer or age or anything other than feasible to support my opinion so its not worth much.

However I would say from experience that turbines in the size you are using are all basically the same design built to cover a wide range of duty. Eg all good for 100psig exhaust just change the nameplate for the customer conditions if lower. The inlet nozzle would probably be optimised for the service but in your case is not much of a change. The sentinel valve would be set to suit the exhaust condition but the safety could be nearer to 100psi to be standard.
The two manual valves mentioned by Ross are to increase efficiency at low load by closing them fully one or two to reduce throttling on main governor. There is no monitoring required.
If they are closed under existing load you are in luck just open them to cater for extra flow which will be required.
I would be inclined to check the manufacturers range to see if what I suggest is likely then provided you believe the casing is good enough to take it just close the exhaust valve to increase pressure to 50 psi and see if performance satisfies you. If not you need new nozzles, or even a larger govenor valve if it is fully open.


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