Study on Replacement Cycle Optimization of Gas Turbine Multistage Intake Ffilter System
As an important part of gas turbine,air intake filter system can effectively reduce pollutants into compressor and ensure compressor efficiency.However,with the accumulation of running time,the performance of the filter screen deteriorates,which eventually leads to the decrease of gas turbine power and the increase of gas consumption rate,so the filter element needs to be replaced timely.Aiming at the minimum replacement cost per unit power generation in the whole life cycle of filter,a method for calculating the optimal replacement period of multistage air intake filter system is proposed.Firstly,the relationship between pressure difference and time was obtained by analyzing the historical data of pressure difference of three-stage filter,and then the relationship between power loss and gas consumption rate and pressure drop was established.Finally,the optimization model of multistage filter replacement cycle was established.Meanwhile,the influence degree of on-grid electricity price,filter cost and fuel price on replacement cycle was analyzed through sensitivity.The results show that under the current boundary conditions,the replacement cost of pre-filter,fine filter and high efficiency filter decreases first and then increases with the increase of replacement cycle,and there is a minimum extreme point.And the optimized filter replacement cost per unit power generation is lower than the actual replacement cost,which has obvious economy;In addition,the sensitivity analysis shows that the on-grid electricity price and the filter cost have a greater impact on the replacement cycle,while the fuel price has a smaller impact.The price of feed-in electricity and fuel increases,and the optimal replacement cycle is shortened,while the cost of the filter increases,and the optimal replacement cycle is extended.Therefore,for the air intake system,the power plant should replace the filter with the minimum replacement cost per unit of power generation during the life cycle of the filter,so as to meet the economic needs of the power plant,and the power plant should calculate the best replacement cycle according to its actual situation.
gas turbinemultistage air intake filter systemoptimal replacement cyclesensitivity analysis
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