Bohdan Y. Heat transfer and hydrodynamics in heat exchangers with compact arrangement of tube bundles for cogeneration plants based on ship's reciprocation internal combustion engines.

The thesis is devoted to the experimental and theoretical study of the processes of heat transfer, fluid flow and exergy efficiency co-generation plants based on ship internal combustion engines. Based on the results of researches the author proposes a new developed design of heat exchanger for heat recovery of exhaust gases of internal combustion engines. Methods for determination of thermal and electric power and exergy analysis of the waste gate line of co-generation plants based on reciprocating internal combustion engines are given. The mathematical model has been developed and a numerical simulation of heat and mass transfer in heat exchangers of a new design has been done. General regularities of heat- and mass transfer in the recovery of waste heat gases in the investigated heat exchanger were determined. Also the influences of dynamic and geometric parameters on the thermal efficiency of new heat exchanger were defined. It was experimentally established the dependence of dynamic and thermal parameters of the coolant on the characteristics of heat exchangers for compressed bundles, which are used in heat exchangers of new design. As a result of researches it was obtained a new design of heat exchangers which in comparison with heat exchangers of well-known designs have smaller dimensions (on 50 %) and mass (on 10 %), and thermal-hydraulic efficiency twice as many others.