Research on design of marine heat exchangers from exhaust gas

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Basic research for optimized design of marine exhaust heat exchanger (exhaust gas economizer) includes two experiments: adhesion test of real soot as solid component in the exhaust gas on sample of plate finned tube, and air-water heat exchanging test with bank of plate finned tube, coated with thermal insulating paper as quasi-soot. The former one evidenced formation of soot layer with partial detachment to occlude flow path between adjacent fins. the latter one showed that pressure drop through bank of the finned tube was higher than expected design value, and total heat transfer coefficient was lower than expected value due to the insulating paper layer.