Dissertation > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Industrial thermal equipment > Heat Transfer Equipment

Numerical Simulation of the compact heat exchanger heat transfer and flow characteristics

Author KouLei
Tutor LiaoShengMing
School Central South University
Course Heating,Gas Supply, Ventilation and Air Conditioning Engineering
Keywords Compact heat exchanger Numerical calculation Fin Plate-fin heat exchanger Optimization
Type Master's thesis
Year 2009
Downloads 302
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Research and development has become the main trend of the current heat exchanger technology development suitable for different conditions require high performance heat transfer equipment . Compact heat exchanger has been widely used due to its advantages of energy efficient as the basic components of the compact heat exchanger fin , its thermal performance of the research will not only help to improve the overall performance of the system , but also for improving the compact the design of the heat exchanger , the introduction of more energy, materials , compact heat exchangers has important guiding significance . In this paper, the numerical calculation method of compact heat exchangers , heat transfer and flow characteristics common louver fin heat exchanger , serrated fins and corrugated fins were simulated by the model for different structural parameters calculated and analysis , the following conclusions : ( 1) of the louver fin blinds deflection angle 26 ° ~ 28 ° conducive to heat transfer, pressure drop larger ; fin height increases can improve the overall pass thermal properties ; fin pitch and louver pitch ratio of 1.25 to 1.55 when the best heat transfer performance . (2) of the serrated fins wrong tooth pitch pitch 0.5 times the overall heat transfer performance , better overall heat transfer pitch smaller incision length decreases conducive to heat transfer but the pressure drop increase large , the overall heat transfer effects influenced by tooth height . \thermally enhanced , but the pressure drop increases ; 2 times the amplitude and wavelength ratio of 0.15 to 0.3 , the overall heat transfer performance is better . (4 ) of the plate-fin heat exchanger numerical study calculated to draw the heat exchanger heat transfer coefficient and pressure drop values ??; then calculate the thermal design of the heat exchanger , the numerical results with thermal design calculations were compared. Conclusion of this article for the optimal design of compact heat exchanger to provide a reference .

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