Mathematical modeling of combined low-potential heat recovery systems for exhaust gases and ventilation emissions

Purpose of research. The article provides a mathematical description of the heat transfer process during the combined utilization of low-potential waste heat and ventilation emissions in the channels of a multilayer plate heat exchanger.

Methods. In order to describe the operation of a combined exhaust gas and ventilation emissions disposal system, a mathematical model has been developed that takes into account the distribution of air flows in the channels of a plate heat recovery unit during the utilization of low-potential heat transferred by the air mass and heat transfer through a flat multilayer wall with integrated semiconductor Peltier elements. Based on this method, a methodology has been developed for the development and design of highly efficient and economical low-potential heat recovery systems with associated generation of thermoelectricity.

Results. A mathematical model has been developed describing the operation of a combined waste gas and ventilation emissions disposal system, including flow distribution in the channels of a plate heat recovery unit, heat recovery using Peltier thermoelectric elements and their effects on heat transfer through a flat multilayer wall, which will further create a design methodology for highly efficient and economical heat recovery systems, optimize heat and mass transfer processes., to conduct numerical experiments with an assessment of economic efficiency.

Conclusion. In order to increase the efficiency of waste gas low-potential heat recovery systems and ventilation emissions, a mathematical model has been created that includes the distribution of air flows in the interplate space of the heat exchanger, the process of heat transfer through a flat multilayer wall with mounted flat semiconductor Peltier elements.

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