POWER-GEN Asia 2018

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Emission and Performance Upgrade for F-Series Gas Turbine Retrofit (Room Garuda 10B, 1st Floor)

One of major global concerns about fossil fueled power is emission. Demand on NOx reductions in the power sector is environmental, social and political issues in most of countries. This is a challenge for existing thermal power plants since they are still important sources to meet the increasing power demand in Asia. In order to address this, there are significant efforts MHPS (Mitsubishi Hitachi Power Systems) have been making to develop new technologies utilizing their technical advancements and excellences. This paper discusses retrofit application of advanced technologies to improve NOx emission of in-service gas turbines. There are several options on achievement of NOx reduction and modification scope, so that plant operators are able to select solutions considering their requirement of improvement, financial and operational conditions. One of solutions developed for plant operators to seek for significant improvement of NOx is retrofit application of cutting edge combustion system which has been already operated in the latest gas turbine frames. The first retrofit application project is also starting for F class in-service gas turbines in Asia. Other solutions are available with less modification scope than combustion system modification. NOx emission is sensitive to combustion temperature and the lower temperature reduces NOx while it may compromise power output and performance. In this area, turbine parts upgrade solves this dilemma. High-performance parts allow combustion temperature to be reduced maintaining plant performance. Hence, the turbine upgrade contributes for NOx improvement without modifications more than periodical maintenance scope. Including above technologies, lineup of emission improvement program is introduced, which would help meet requirements of diverse plant operators, markets and society.