Thermal-Hydraulic Studies on the Shell-and-Tube Heat Exchanger with Minijets

Abstract

In this paper a patented design of a heat exchanger with minijets, with a cylindrical construction is presented. It is followed by the results of its systematic experimental investigations in the single-phase convection heat transfer mode. Based on these results, validation of selected correlations (coming from the literature) describing the Nusselt number was carried out. An assessment of the heat exchange intensification level in the described heat exchanger was done through the comparison with a shell-and-tube exchanger of a classical design. The thermal-hydraulic characteristics of both units were the subjects of comparison. They were constructed for the identical thermal conditions, i.e., volumetric flow rates of the working media and the media temperatures at the inlets to the heat exchanger. The experimental studies of both heat exchangers were conducted on the same test facility. An increase in the heat transfer coefficients values for the minijets heat exchanger was observed in comparison with the reference one, whereas the generated minijets caused greater hydraulic resistance. Experimentally confirmed intensification of heat transfer on the air side, makes the proposed minijets heat exchanger application more attractive, for the waste heat utilization systems from gas sources.

Heat Transfer Coefficient Determination during FC-72 Flow in a Minichannel Heat Sink Using the Trefftz Functions and ADINA Software

“…In Ref. [6], a cylindrical heat exchanger with minijets was used in the experiments, whereas a tubular reference heat exchanger was used for comparison. During the testing of both heat exchangers at the single-phase convection, hot air was used as a heating medium, while water was a heated medium.…”

Study on Surface Condensate Water Removal and Heat Transfer Performance of a Minichannel Heat Exchanger

“…Swift et al [8] developed an MHE that was used in common components (such as the photomultiplier tube). Wajs et al [9] presented a heat exchanger with mini-jet and cylindrical construction. Li Hui et al [10] utilized an MHE as a condenser in fully wet operating conditions.…”

Diseño térmico de un intercambiador de calor de tubo y coraza para el enfriamiento de metanol

“…Los ICTC han sido diseñados y/o evaluados por varios autores, que van desde el diseño y evaluación del rendimiento utilizando ANSYS (Dinámica Computacional de Fluido) (Singh y Pal, 2016); la fabricación de ICTC utilizando deflectores helicoidales basados en la metodología de Kern (Harika et al, 2017); el análisis del rendimiento por medio de un método analítico empleado para desarrollar las correlaciones, las cuales fueron insertadas en MATLAB para comprobar luego la idoneidad térmica e hidráulica del equipo diseñado (Ebieto y Eke, 2012); el análisis experimental conteniendo deflectores segmentados a diferentes orientaciones, operando el equipo bajo flujo laminar (Singh y Sehgal, 2013); la evaluación de la influencia de varios parámetros geométricos y de operación sobre el diseño térmico de un ICTC (Sigimon et al, 2015); el análisis térmico extensivo relacionado con la evaluación de la influencia de condiciones severas de carga sobre el rendimiento de un ICTC, utilizando para ello el software ANSYS 14.0 (Dubey et al, 2014); el diseño patentado de un ICTC equipado con minijets y con construcción cilíndrica (Wajs et al, 2019); el estudio del incremento de la transferencia de calor a partir de la mejora de la configuración de un ICTC considerando tanto el espaciado como el corte de los deflectores (Yousufuddin, 2018); y por último el diseño tanto térmico como mecánico de un ICTC para la industria de bebidas por medio de un método simplificado (Gawande et al, 2012).…”