Heat transfer evaluation of a micro heat exchanger cooling with spherical carbon-acetone nanofluid

2020 ◽  
Vol 149 ◽  
pp. 119124 ◽  
Author(s):  
Z.X. Li ◽  
Usama Khaled ◽  
Abdullah A.A.A. Al-Rashed ◽  
Marjan Goodarzi ◽  
M.M. Sarafraz ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Spherical Carbon ◽  
Micro Heat Exchanger

Design Optimization of Micro-channel Heat Exchanger embedded in LTCC

2012 ◽  
Vol 2012 (1) ◽  
pp. 000857-000865
Author(s):  
Aparna Aravelli ◽  
Singiresu S. Rao ◽  
Hari K. Adluru
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Thermal Management ◽  
Optimization Technique ◽  
Thermal Design ◽  
Transfer Rates ◽  
Design Variables ◽  
Micro Heat Exchanger ◽  
Micro Systems ◽  
Silver Metal

Increase in the density of electronic packaging leads to the investigation of highly efficient thermal management systems. The challenge in these micro-systems is to maximize heat transfer per unit volume. In the author's previous work, experimental and computational analysis has been performed on LTCC substrates using embedded silver vias. This novel technique of embedding silver vias along with forced convection resulted in higher heat transfer rates. The present work further investigates into the optimization of this model. A Multi-objective optimization problem has been formulated for the heat transfer in the LTCC model. The Log Mean Temperature Difference (LMTD) method of heat exchangers has been used in the formulation. Optimization is done based on maximization of the total heat transferred and minimization of the coolant pumping power. Structural and thermal design variables are considered to meet the manufacturability and energy requirements. Demanded pressure loss and volume of the silver metal are used as constraints. The classical optimization technique Sequential Quadratic Programming (SQP) is used to solve the micro-heat exchanger problem. The optimal design is presented and sensitivity analysis results are discussed.

A Review of Micro Heat Exchanger Flow Physics, Fabrication Methods and Applications

2001 ◽  
Author(s):  
W. Jerry Bowman ◽  
Daniel Maynes
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Design Optimization ◽  
Heat Exchangers ◽  
Review Of The Literature ◽  
Fourth Section ◽  
The Third ◽  
Heat Exchanger Design ◽  
Micro Heat Exchanger ◽  
The Subject

Abstract A review of the literature in the area of micro heat exchangers is presented to provide a concise overview of the recent advances in this field of study. The review is divided into six sections. The first section reviews research focused on understanding friction and heat transfer in microchannels. The second section deals with heat exchanger design, optimization and comparison studies. The third section deals with fabrication methods used for constructing micro heat exchangers. The fourth section reviews applications of micro heat exchangers. The last two sections of the paper deal with miscellaneous topics and other reviews on the subject. The total review focuses on advances made after the early 1990’s.

scholarly journals On the Thermal Performance of a Microparallel Channels Heat Exchanger

2018 ◽  
Vol 11 (2) ◽  
Author(s):  
Ivana Fernandes de Sousa ◽  
Carolina Palma Naveira Cotta ◽  
Daduí Cordeiro Guerrieri ◽  
Manish K. Tiwari
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Heat Exchanger ◽  
Theoretical Analysis ◽  
Transfer Problem ◽  
Heat Transfer Problem ◽  
Coolant Fluid ◽  
Differential Formulation ◽  
Micro Heat Exchanger ◽  
Conjugated Heat Transfer

Abstract This paper presents the experimental and theoretical analysis of a micro heat exchanger designed for the waste heat recovery from a high concentration photovoltaic (HCPV) system. A test bench was built to analyze the thermal behavior of a heat exchanger targeted to work in a similar condition of an existing HCPV panel. A high power heater was encapsulated inside a copper cartridge, covered by thermal insulation, leading to dissipated heat fluxes around 0.6 MW/m2, representative of the heat flux over the solar cell within the HCPV module. The experimental campaign employed water as the coolant fluid and was performed for three different mass flow rates. An infrared camera was used to nonintrusively measure the temperature field over the micro heat exchanger external surface, while thermocouples were placed at the contact between the heat exchanger and the heater, and at the water inlet and outlet ports. In the theoretical analysis, a hybrid numerical–analytical treatment is implemented, combining the numerical simulation through the comsolmultiphysics finite elements code for the micro heat exchanger, and the analytical solution of a lumped-differential formulation for the electrical heater cartridge, offering a substantial computational cost reduction. Such computational simulations of the three-dimensional conjugated heat transfer problem were critically compared to the experimental results and also permitted to inspect the adequacy of a theoretical correlation based on a simplified prescribed heat flux model without conjugation effects. It has been concluded that the conjugated heat transfer problem modeling should be adopted in future design and optimization tasks. The analysis demonstrates the enhanced heat transfer achieved by the microthermal system and confirms the potential in reusing the recovered heat from HCPV systems in a secondary process.

Research of Heat Transfer Performance on Tablet Microstructure Heat Exchanger Used for LED Lamps

2013 ◽  
Vol 380-384 ◽  
pp. 3082-3085 ◽  
Author(s):  
Jian Zhuang ◽  
Wei Hu ◽  
Da Ming Wu ◽  
Ya Jun Zhang ◽  
Zhong Li Zhao ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Transfer Performance ◽  
Simulation Software ◽  
Heat Transfer Characteristics ◽  
Metal Base ◽  
Transfer Characteristics ◽  
Micro Heat Exchanger ◽  
The Impact ◽  
Core Problem

With successful development of LED lamps, the dissipation of LED lamps has become the core problem. If the heat produced during the work cant be loss in time, the high temperature of the lamps will affect their service lives or even damage the LED permanently. In this paper, based on the principle of finite element method, using thermal simulation software, the effect of the geometric characteristics micro-structure of the heat exchanger combining polymer micro-scale fins and metal base on the heat transfer characteristics was simulated. The impact of the fin width, wing fin pitch, fin height and thickness of the substrate on the tablet microstructure heat transfer characteristics was analyzed. The results provide some technical reference for the design and application of the micro heat exchanger.

Experimental investigate of heat transfer for graphene/water nanofluid in micro heat exchanger

2017 ◽  
Author(s):  
S. E. Abd Elhafez ◽  
E. M. Abo-Zahhad ◽  
A. H. El-Shazly ◽  
M. F. El-Kady
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Micro Heat Exchanger

scholarly journals Heat Transfer through Wire Cloth Micro Heat Exchanger

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3567
Author(s):  
Christian Walter ◽  
Sebastian Martens ◽  
Christian Zander ◽  
Carsten Mehring ◽  
Ulrich Nieken
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Design Parameters ◽  
Recycling Industry ◽  
Nusselt Numbers ◽  
Temperature Distributions ◽  
Micro Heat Exchanger ◽  
Wire Cloth ◽  
Woven Structure

The main objective of this study is to calculate and determine design parameters for a novel wire cloth micro heat exchanger. Wire cloth micro heat exchangers offer a range of promising applications in the chemical industry, plastics technology, the recycling industry and energy technology. We derived correlations to calculate the heat transfer rate, pressure drop and temperature distributions through the woven structure in order to design wire cloth heat exchangers for different applications. Computational Fluid Dynamics (CFD) simulations have been carried out to determine correlations for the dimensionless Euler and Nusselt numbers. Based on these correlations, we have developed a simplified model in which the correlations can be used to calculate temperature distributions and heat exchanger performance. This allows a wire cloth micro heat exchanger to be virtually designed for different applications.

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