Numerical analysis of flow and electric field effects on an EHD enhanced mini heat exchanger

Mingkan Zhang; Omar Abdelaziz

doi:10.1115/HT2017-4800

Numerical analysis of flow and electric field effects on an EHD enhanced mini heat exchanger

Mingkan Zhang, Omar Abdelaziz

Multifunctional Equipment Integration

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A novel design of a mini heat exchanger utilizing forced convection heat transfer enhancement with electrohydrodynamic (EHD) technique has been numerically investigated. When a high voltage is applied to a metal wire, air in its vicinity will be ionized and the injected ions will travel towards electrically grounded heat exchanger surfaces, leading to the corona wind. As a result, the corona wind disturbs the heat exchanger boundary layer and thus enhances heat transfer between the heat exchanger surface and its ambient air. A three dimensional numerical model has been developed to evaluate the heat transfer coefficient (HTC) and air side pressure drop of this EHD enhanced mini heat exchanger. Influences of position and size of the wire are evaluated in order to achieve the highest enhancement. In addition, the swirling flow pattern induced by EHD has been studied due to its important role in heat transfer enhancement. The results show a three times increase of HTC enhanced by EHD effect in present design comparing to the one without EHD effect. The most promising result shows an overall heat transfer coefficient equal to 318 W/(m2·K) for a bare tube in cross flow configuration with airside pressure drop of 2.8 Pa.

Original language	English
Title of host publication	Aerospace Heat Transfer; Computational Heat Transfer; Education; Environmental Heat Transfer; Fire and Combustion Systems; Gas Turbine Heat Transfer; Heat Transfer in Electronic Equipment; Heat Transfer in Energy Systems
Publisher	American Society of Mechanical Engineers
ISBN (Electronic)	9780791857885
DOIs	https://doi.org/10.1115/HT2017-4800
State	Published - 2017
Event	ASME 2017 Heat Transfer Summer Conference, HT 2017 - Bellevue, United States Duration: Jul 9 2017 → Jul 12 2017

Publication series

Name	ASME 2017 Heat Transfer Summer Conference, HT 2017
Volume	1

Conference

Conference	ASME 2017 Heat Transfer Summer Conference, HT 2017
Country/Territory	United States
City	Bellevue
Period	07/9/17 → 07/12/17

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This work was sponsored by the U. S. Department of Energy’s Building Technologies Office. We would like to acknowledge Mr. Antonio Bouza the Technology Manager for the HVAC & Appliances for his support.

Funders	Funder number
U. S. Department of Energy’s Building Technologies Office
U.S. Department of Energy

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10.1115/HT2017-4800

Cite this

Zhang, M., & Abdelaziz, O. (2017). Numerical analysis of flow and electric field effects on an EHD enhanced mini heat exchanger. In Aerospace Heat Transfer; Computational Heat Transfer; Education; Environmental Heat Transfer; Fire and Combustion Systems; Gas Turbine Heat Transfer; Heat Transfer in Electronic Equipment; Heat Transfer in Energy Systems (ASME 2017 Heat Transfer Summer Conference, HT 2017; Vol. 1). American Society of Mechanical Engineers. https://doi.org/10.1115/HT2017-4800

Zhang, Mingkan ; Abdelaziz, Omar. / Numerical analysis of flow and electric field effects on an EHD enhanced mini heat exchanger. Aerospace Heat Transfer; Computational Heat Transfer; Education; Environmental Heat Transfer; Fire and Combustion Systems; Gas Turbine Heat Transfer; Heat Transfer in Electronic Equipment; Heat Transfer in Energy Systems. American Society of Mechanical Engineers, 2017. (ASME 2017 Heat Transfer Summer Conference, HT 2017).

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title = "Numerical analysis of flow and electric field effects on an EHD enhanced mini heat exchanger",

abstract = "A novel design of a mini heat exchanger utilizing forced convection heat transfer enhancement with electrohydrodynamic (EHD) technique has been numerically investigated. When a high voltage is applied to a metal wire, air in its vicinity will be ionized and the injected ions will travel towards electrically grounded heat exchanger surfaces, leading to the corona wind. As a result, the corona wind disturbs the heat exchanger boundary layer and thus enhances heat transfer between the heat exchanger surface and its ambient air. A three dimensional numerical model has been developed to evaluate the heat transfer coefficient (HTC) and air side pressure drop of this EHD enhanced mini heat exchanger. Influences of position and size of the wire are evaluated in order to achieve the highest enhancement. In addition, the swirling flow pattern induced by EHD has been studied due to its important role in heat transfer enhancement. The results show a three times increase of HTC enhanced by EHD effect in present design comparing to the one without EHD effect. The most promising result shows an overall heat transfer coefficient equal to 318 W/(m2·K) for a bare tube in cross flow configuration with airside pressure drop of 2.8 Pa.",

author = "Mingkan Zhang and Omar Abdelaziz",

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year = "2017",

doi = "10.1115/HT2017-4800",

language = "English",

series = "ASME 2017 Heat Transfer Summer Conference, HT 2017",

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Zhang, M & Abdelaziz, O 2017, Numerical analysis of flow and electric field effects on an EHD enhanced mini heat exchanger. in Aerospace Heat Transfer; Computational Heat Transfer; Education; Environmental Heat Transfer; Fire and Combustion Systems; Gas Turbine Heat Transfer; Heat Transfer in Electronic Equipment; Heat Transfer in Energy Systems. ASME 2017 Heat Transfer Summer Conference, HT 2017, vol. 1, American Society of Mechanical Engineers, ASME 2017 Heat Transfer Summer Conference, HT 2017, Bellevue, United States, 07/9/17. https://doi.org/10.1115/HT2017-4800

Numerical analysis of flow and electric field effects on an EHD enhanced mini heat exchanger. / Zhang, Mingkan; Abdelaziz, Omar.
Aerospace Heat Transfer; Computational Heat Transfer; Education; Environmental Heat Transfer; Fire and Combustion Systems; Gas Turbine Heat Transfer; Heat Transfer in Electronic Equipment; Heat Transfer in Energy Systems. American Society of Mechanical Engineers, 2017. (ASME 2017 Heat Transfer Summer Conference, HT 2017; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Abdelaziz, Omar

PY - 2017

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N2 - A novel design of a mini heat exchanger utilizing forced convection heat transfer enhancement with electrohydrodynamic (EHD) technique has been numerically investigated. When a high voltage is applied to a metal wire, air in its vicinity will be ionized and the injected ions will travel towards electrically grounded heat exchanger surfaces, leading to the corona wind. As a result, the corona wind disturbs the heat exchanger boundary layer and thus enhances heat transfer between the heat exchanger surface and its ambient air. A three dimensional numerical model has been developed to evaluate the heat transfer coefficient (HTC) and air side pressure drop of this EHD enhanced mini heat exchanger. Influences of position and size of the wire are evaluated in order to achieve the highest enhancement. In addition, the swirling flow pattern induced by EHD has been studied due to its important role in heat transfer enhancement. The results show a three times increase of HTC enhanced by EHD effect in present design comparing to the one without EHD effect. The most promising result shows an overall heat transfer coefficient equal to 318 W/(m2·K) for a bare tube in cross flow configuration with airside pressure drop of 2.8 Pa.

AB - A novel design of a mini heat exchanger utilizing forced convection heat transfer enhancement with electrohydrodynamic (EHD) technique has been numerically investigated. When a high voltage is applied to a metal wire, air in its vicinity will be ionized and the injected ions will travel towards electrically grounded heat exchanger surfaces, leading to the corona wind. As a result, the corona wind disturbs the heat exchanger boundary layer and thus enhances heat transfer between the heat exchanger surface and its ambient air. A three dimensional numerical model has been developed to evaluate the heat transfer coefficient (HTC) and air side pressure drop of this EHD enhanced mini heat exchanger. Influences of position and size of the wire are evaluated in order to achieve the highest enhancement. In addition, the swirling flow pattern induced by EHD has been studied due to its important role in heat transfer enhancement. The results show a three times increase of HTC enhanced by EHD effect in present design comparing to the one without EHD effect. The most promising result shows an overall heat transfer coefficient equal to 318 W/(m2·K) for a bare tube in cross flow configuration with airside pressure drop of 2.8 Pa.

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BT - Aerospace Heat Transfer; Computational Heat Transfer; Education; Environmental Heat Transfer; Fire and Combustion Systems; Gas Turbine Heat Transfer; Heat Transfer in Electronic Equipment; Heat Transfer in Energy Systems

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Zhang M, Abdelaziz O. Numerical analysis of flow and electric field effects on an EHD enhanced mini heat exchanger. In Aerospace Heat Transfer; Computational Heat Transfer; Education; Environmental Heat Transfer; Fire and Combustion Systems; Gas Turbine Heat Transfer; Heat Transfer in Electronic Equipment; Heat Transfer in Energy Systems. American Society of Mechanical Engineers. 2017. (ASME 2017 Heat Transfer Summer Conference, HT 2017). doi: 10.1115/HT2017-4800

Numerical analysis of flow and electric field effects on an EHD enhanced mini heat exchanger

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