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How we can improve gas turbine or compressor efficiency ?

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تم إضافة السؤال من قبل samrand Ghazi
تاريخ النشر: 2016/03/14
Floris van Straaten
من قبل Floris van Straaten , Regional Director , Poyry Switzerland Ltd.

increase the firing temperature, reduce the clearances in the compressor, design the compressor blades in a way to optimize the efficiency, reduce the exhaust gas temperature

Hmeidan Gheith
من قبل Hmeidan Gheith , mechanical inspector , cementra

Efficiency improvements in gas turbine engines can be increased by minimizing the clearance between stationary and rotating parts, good cooling and reduce the temperature,prpoper maintenance, compressor wash and F.O.D Check

مستخدم محذوف‎
من قبل مستخدم محذوف‎

  • Compressor can be increased by regular water was either on-line or off-line.off-line water wash is more effective.clearance between compressor blades and casing should be proper otherwise it  decreases its efficiency. 
  • Turbine efficiency can be increased  by minimizing heat lose. turbine's shrouds and diaphram's condition should be ok otherwise flue gases leak from there without extracting heat from it and this decreases turbine efficiency. turbines can also be increased by providing inlet air chillers to compressor inlet air.    
  • And regular maintenance will increase overall efficiency of compressor and turbine. 

SUMIT SAXENA
من قبل SUMIT SAXENA , Shift Charge Engineer , Aluminium Bahrain -ALBA

There can be multiple approach to this answer. Actually both turbine & compressor efficiency are interrelated as much as that a 1% efficiency gain in compressor can be considered as 2% gain in turbine efficiency as compressor consumes almost 2/3rd of total torque generated by the hot expanding gases.

Rather than suggesting turbine overhaul & other maintenance related aspects like blade tip clearance etc, I would suggest some Operation related measures which can be helpful.

1. Making a plan & performing Online waterwash on regular basis to keep the compressor blades clean & avoid accumulation & fouling by dust lying on blades for longer intervals. To decide upon the frequency, a fixed duration or interval based on compressor's adiabatic efficiency reduction can be considered. Whenever an opportunity is available, offline waterwash with inlet bellmouth hand cleaning is suggested.

2. Inlet air filter house condition plays a very important role as increased differential pressure directly translates to reduced compressor efficiency & hence turbine efficiency. Filter house pulsing to be maintained in good condition & monitored proactively. A increase of 5 mbar dp corresponds to almost 0.5% efficiency loss.

3. Efficient sealing to be maintained across Diverter & Guillotine dampers in case of combine cycle applications. Any flue gas leaking due to inefficient sealing, is direct loss of energy & hence less steam to STG & loss of MW.

4. Orifices in the sealing & purge air extractions from GT compressor to be checked at regular intervals as increased clearances might cause undue loss of air hence loss of efficiency.

etc.

mohamed a maksoud
من قبل mohamed a maksoud , gen. mgr gen. maintenance , gupco

Using detergent wash per month or seeds cleaning per annual also replace air inlet filter to reduce inlet d p

Hasan Zainy
من قبل Hasan Zainy , Control / Instrumentation Filed Service Engineer , GE

I think the best to invite the manufacturing of the unit you working on to evaluate and answer.

 

the answer will be based on your unit specifically. In general go back to basic and think about Breyton cycle and how to increase the area under the curve

 

some ideas 

Calibrating the IGV & waterwash?

checking the temperature curve with the manufacturing

 

 

is there a steam inlet in your unit? 

david cordero
من قبل david cordero , Technical Advisor , Siemens Venezuela

In hotter climates can be improved by spraying a finely atomized water fog in front of the air filter house. This increases volumetric efficiency by artificially creating cooler and denser air.

In the other hand, to increase GT or compressor efficiency there are several ways to go, one of the most commonly approached is 3D aerodynamic design of blades and nozzles, and better materials developments. 

Tharick Ahamed
من قبل Tharick Ahamed , Project & Sales Engineer , AMA Allied Mechanical Industrial Equipment Maintenance & Service

Regular Maintenance is the first step for improving efficiency in any system , the efficiency can also be increased by making the system as simple as possible without making any unwanted complication in design. If the turbine is made with light weight materials and also by balancing the weight ratio of turbine and generator I think there might be a possibility in increasing the efficiency. We should also focus on the steam and see whether any unwanted waste might affect the turbine.

Hope its the answer of the question.   

Muhammad Nadeem
من قبل Muhammad Nadeem , Mechanical Technician , Hub power Station Ltd Pakistan

1 control the quality of turbine  air fuel ratio  

2 through HRSG  or combine cycle  system

 

Farhan Baig
من قبل Farhan Baig , LEAD INSTRUMENT ENGINEER , FARABI PETROCHEMICALS

By decreasing the inlet air temperature at compressor.