scholarly journals PRELIMINARY DEVELOPMENT OF A CONCEPTUAL MODEL OF MATRIX HEAT EXCHANGER

2021 ◽  
Vol 24 (1) ◽  
pp. 29-40
Author(s):  
Claudia Bogdan ◽  
Catalin Brill ◽  
Oleksandr Sirosh ◽  
Mihai Vijulie ◽  
Alin Lazar
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Perforated Plate ◽  
Hydrogen Isotopes ◽  
Inlet Temperature ◽  
Distillation Columns ◽  
Matrix Heat Exchanger ◽  
Cryogenic Distillation ◽  
Matrix Heat

While the basic principles of thermodynamics have remained the same, the necessity for heat exchangers to have good effectiveness in a small volume is constantly growing. Heat exchangers type Matrix Heat Exchanger (MHE), which can meet these requirements, does not have an optimal design variant for its use. These heat exchangers have been approached for 60 years, by many researchers, currently offering only an overview of the process. The mechanism of heat transfer in a matrix heat exchanger is complex, having three different thermal convection paths as well as thermal conduction through two different surfaces. This paper presents the simulations performed in ANSYS Workbench, combining all these heat transfer modes, for developing an optimal model of a perforated plate matrix heat exchanger, used for the pre-cooling of a hydrogen isotopes stream mixture, for purification purposes, as well as, for preparing the inlet temperature in cryogenic distillation columns of hydrogen isotopes.

scholarly journals Experimental and numerical investigation of thermal and fluid-flow processes in a matrix heat exchanger

2019 ◽  
Vol 23 (1) ◽  
pp. 11-21
Author(s):  
Mladen Tomic ◽  
Predrag Zivkovic ◽  
Biljana Milutinovic ◽  
Mica Vukic ◽  
Aleksandar Andjelkovic
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Perforated Plate ◽  
Hot Water ◽  
Experimental Chamber ◽  
Geometrical Parameters ◽  
The Matrix ◽  
Matrix Heat Exchanger ◽  
Matrix Heat

The need for compact heat exchangers has led to the development of many types of surfaces that enhance the rate of heat transfer, among them the matrix heat exchangers. These heat exchangers consist of a series of perforated plates mutually separated and sealed by spacers. The goal of this research was to investigate the heat transfer process of matrix heat exchangers on the air side, at the close to ambient conditions. The research was conducted in two directions ? experimental research and CFD research. The experimental investigation was carried out over a perforated plate package with the porosity of 25.6%. The air/water matrix heat exchanger was heated by hot water and was installed in an experimental chamber at which entrance was a fan with the variable flow rate and heated by hot water. The thermocouples were attached to the surface of the perforated plate at the upwind and downwind sides, as well as at the inlet and the outlet of the chamber. During each experiment, the thermocouple readings and the air and water-flow and temperatures were recorded. In the numerical part of the research, the matrix heat exchangers with different plate porosity from 10 to 50% were investigated. The results of the numerical simulations were validated against the experimental results. On the basis of the experimental and numerical results, equations for heat transfer as the function of Reynolds number and geometrical parameters was established.

Waste Heat Recovery Using Matrix Heat Exchanger from the Exhaust of an Automobile Engine for Heating Car’s Passenger Cabin

2014 ◽  
Vol 984-985 ◽  
pp. 1132-1137
Author(s):  
P. Muthusamy ◽  
Palanisamy Senthil Kumar
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Waste Heat ◽  
Working Fluid ◽  
Cold Fluid ◽  
Matrix Heat Exchanger ◽  
Matrix Heat ◽  
Passenger Cabin

The main objective of our work is to analysis the heat transfer rate for various fluids with different matrix heat exchanger (MHE) models and flow characteristic in matrix heat exchanger by using computational fluid dynamics (CFD) package with small car. The amount of heat carried by the cold fluid from hot fluid is mainly depends upon the mass flow rate of the working fluid. The heat transfer area per unit volume of tube is more. So, it increases the temperature of the cold fluid. Here, the hot and cold fluids are moving in the alternate tubes of heat exchanger in the counter flow direction. The small amounts of pressure drop are occurred but which is less compared to existing model. Flow disturbances are rectified in the MHE through the modifications made. Since, silicon carbide material is used as a polishing material to avoid the deposit of carbon at the inner side of the flow passage and this waste heat energy is used for heating passenger cabin during winter season. The wood is used as an insulating material to avoid the heat flow from fluid to atmosphere. Keywords-Heat transfer rate, Matrix heat exchanger, Working fluid, Polishing material.

Discussion: “Analysis of Matrix Heat Exchanger Performance” (Venkatarathnam, G., and Sarangi, S., 1991, ASME J. Heat Transfer, 113, pp. 830–836)

1998 ◽  
Vol 120 (3) ◽  
pp. 801-803
Author(s):  
V. Ahuja ◽  
R. K. Green
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Numerical Scheme ◽  
Approximate Analytical Solution ◽  
Full Effect ◽  
Matrix Heat Exchanger ◽  
Balanced Flow ◽  
Matrix Heat ◽  
Flow Case

Recently, a new numerical scheme for solving the equations governing matrix heat exchanger thermal performance was published in this journal. It was found that this scheme does not include the full effect of longitudinal heat transfer in the said heat exchangers. This effect is demonstrated by correcting the parameter related to longitudinal heat transfer in the approximate analytical solution for the balanced flow case and finding it to deviate considerably from the numerically calculated result.

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