GTG frame V 5361 performance at 105 % and above of capacity


Thread Starter

Ramesh Thakur

What are the problems that may occur if a Gas Turbine GTG frame V model 5361 runs above 105% of the its capacity?

Why we can't load the GTG frame V model 5361 above 105% load?

Is something mentioned by the Manufacturer (Althom) in their any manual? Where?

-- Ramesh Thakur
Manager/Mech/Captive Power plant/ NFL Vijaipur/GUNA(MP)INDIA-- 473111
[email protected]
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Difficult to understand what you mean. Do you mean 105% of ISO capacity? If yes, how do you intend to achieve this? Any real increase in capability is going to mean an increase in Exhaust Temp. which is going to mean an adjustment of the Control Spec. Is this what you mean?
The "short" answer to this question is that the internal hot gas path components will not, and cannot be expected to, last as long as if the unit were being operated with the normal control parameters.

How much degradation while the hot gas path parts experience? That's anyone's guess. Depends on lots of factors, including the manufacturer or refurbisher, the amount of time the parts have been installed in the unit prior to the change in operating parameters, etc.

Some other concerns would be the load coupling (is it rated to transmit the torque which would be developed in the over-loaded condition?), and the driven device (is the generator or mechanical load rated to be able to withstand the increased load), and the cooling system(s) (are all cooling systems rated to be able to remove any additional heat developed under the overloaded operation and during the time expected to be overloaded?).

And, the amount of time the unit would be subjected to overload would also be very crucial in how much degradation the hot gas path parts would experience.

You would do well to contact some suppliers to see if they offer upgrades to the unit you are operating to allow the increased power production without experiencing premature and possibly catastrophic failures of hot gas path parts if you might want to operate the unit at the 105% output for extended periods of time.

You might also do well to obtain a copy of GER-3620 to see some information about operating units at Peak and Peak Reserve loads (essentially above rated output) and what affect operating at those loads has on expected parts life and how it reduces the time intervals between maintenance outages in order to try to prevent catastrophic hot gas parts failure.

And, this is all assuming the load coupling, the driven device, and the cooling system(s) are all rated for the 105% operation.

Once these questions have been answered, then you will have to determine how you will achieve the 105% operation.
Well if you want more than 105% bring it on up to Alaska... at -40 F the only thing you have to worry about is the capacity of your gearbox... It's all about exhaust gas temp...