In this paper the negative effect on the efficiency of coal-fired power generating stations, caused by unequal split ratios of pulverized fuel in pipeline branches downstream from bifurcations, is identified. Five active techniques for controlling split ratios have been developed and tested on a test-scale rig. Three of the five techniques were deemed to have potential for retrofitting into existing power generating stations and have been tested in detail on a large pilot-scale rig. The observations and the ensuing conclusions are presented.
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