Development of a micro-heat exchanger with stacked plates using LTCC technology

Vásquez-Alvarez, Elsa; Degasperi, Francisco Tadeu; Morita, Lúcia; Gongora-Rubio, Mário Ricardo; Giudici, Reinaldo

doi:10.1590/s0104-66322010000300012

Cited by 23 publications

(13 citation statements)

References 11 publications

(12 reference statements)

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“…Flow maldistribution was first considered by Bassoiuny [29]. Later Rao [30] and Tsai [31] investigated flow maldistribution in plate heat exchangers, while micro-channel heat exchanger flow maldistribution was examined by Vásquez-Alvarez [32]. The dimensionless flow rate of a particular channel or layer ( ) is given by the mass flow rate of the channel or layer divided by the total mass flow rate of all of the channels or layers ( , such that: Fig.…”

Section: Heat Exchanger Pressure Drop Experiments and Simulation A Bementioning

confidence: 99%

Design, simulation, and testing of a novel micro-channel heat exchanger for natural gas cooling in automotive applications

Deng¹,

Menon²,

Lavrich³

et al. 2016

Preprint

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Micro-channel heat exchangers offer potential for a highly compact solution in heat transfer applications that have space limitations. Mobile applications such as automotive vehicles are one such area. This work presents the design, modeling, simulation and testing of a two-region micro-channel heat exchanger, employing both engine coolant and R134a, for use in an engine that compresses natural gas for on-board refueling at pressures up to 250 bar. The novel design of the micro-channel heat exchanger is presented. Numerical simulations were performed using ANSYS Fluent utilizing extrapolation techniques to estimate the pressure drop as a function of flow rate and symmetry methods to investigate heat transfer. Pressure drop was determined experimentally, and heat transfer was investigated through system tests employing the novel engine. Experimental results showed good comparison with corresponding numerical simulations which demonstrated the validity of the applied extrapolation and symmetry methods, enabling considerable reduction in computational cost. The pressure drop, flow distribution, and heat transfer characteristics of the heat exchanger are discussed.

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Section: Heat Exchanger Pressure Drop Experiments and Simulation A Bementioning

confidence: 99%

Design, simulation, and testing of a novel micro-channel heat exchanger for natural gas cooling in automotive applications

Deng¹,

Menon²,

Lavrich³

et al. 2016

Preprint

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show abstract

“…Several applications of LTCC microfluidics carrying out different chemical process operations are reported in the literature, including bioreactors [27], enzymatic reactors [28], combustors [29,30], microthrusters [31], mixers [32,33], chemical reactions [34,35], and heat exchangeers [36].…”

Section: Ltcc Microreactorsmentioning

confidence: 99%

LTCC-3D Coaxial Flow Focusing Microfluidic Reactor for Micro and Nanoparticle Fabrication and Production Scale-Out

Gongora-Rubio¹,

Schianti²,

Gomez³

et al. 2013

Journal of Microelectronics and Electronic Packaging

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AbstractÀMiniaturization of chemical processes is becoming a must for green chemistry and sustainable industry processes, so technological research in this direction is well received. Continuous microreactor systems hold many potential benefits over batch reactors, in that they allow: high surface-to-volume ratio, fine adjustment of chemical reaction residence times, small thermal inertia, and fast changes in temperature. Advantages of multilayer green ceramics for microprocess applications include: that the LTCC substrate is chemically inert to most solvents, that it has a high contact angle, that it presents low thermal coefficient of expansion, and that it can withstand high operational temperatures and high internal pressures. For these reasons, LTCC-based microsystem technologies allow the implementation of different unitary operations for chemical processes, making it an enabling technology for the miniaturization of chemical processes. In fact, recently, LTCC microfluidic reactors have been used to produce microparticles and nanoparticles with excellent control of size distribution and morphology. The present work provides a report on the performance of a 3D LTCC coaxial flow focusing microfluidic reactor designed to fabricate microparticles and nanoparticles using nanoprecipitation through an antisolvent; with electric potential size tuning. We also implement an approach to particle production scale-out.

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“…Com isso, a temperatura aumenta até o ponto onde ocorre a pirólise, decompondo o ligante que acaba por arrastar os grãos de cerâmica da superfície, criando um mecanismo auto-limpante [52] . Com o LTCC já se produziu sistemas microfluidicos para diversas aplicações como produção de microesferas de PLGA para encapsulamento de proteína [53] , sistemas para troca de calor [54] , entre outros.…”

Section: Microfabricação Em Ltccunclassified

“…Adaptado de Yue et.al. [147] A cerâmica verde LTCC foi utilizada para testar um sistema de multicanais para troca de calor entre gases [148] . Foram projetadas a partir do COMSOL duas geometrias triangulares, uma com entrada lateral e outra com entrada central, e duas geometrias circulares, sendo que uma delas terminava com quinas e a outra, ao invés das quinas, mais dois canais.…”

Development of a micro-heat exchanger with stacked plates using LTCC technology

Cited by 23 publications

References 11 publications

Design, simulation, and testing of a novel micro-channel heat exchanger for natural gas cooling in automotive applications

Design, simulation, and testing of a novel micro-channel heat exchanger for natural gas cooling in automotive applications

LTCC-3D Coaxial Flow Focusing Microfluidic Reactor for Micro and Nanoparticle Fabrication and Production Scale-Out

Sistemas microfluídicos aplicados na produção de micro e nanopartículas.

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