IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v68y2014icp609-616.html
   My bibliography  Save this article

Optimal design of unequal heat flux elements for optimized heat transfer inside a rectangular duct

Author

Listed:
  • Hajmohammadi, M.R.
  • Rahmani, M.
  • Campo, A.
  • Joneydi Shariatzadeh, O.

Abstract

When the total amount of thermal energy is fixed in a device, it is important to keep the highest temperatures (hot spots) of the device at the minimum level. The present paper deals with the optimal design of heat flux elements mounted on the outer walls of a rectangular duct. The total amount of heat load is fixed and is transferred by in-duct laminar forced convection. The objective is to minimize the hot spots temperature under the platform of constructal design. A numerical simulation is carried out to calculate the hot spots temperatures. The numerical results suggest that the equal heat flux elements (uniform heating) customarily used in industry must be avoided. By conducting a detailed optimization process, it is shown that there exists an optimum ‘descending’ distribution for the unequal heat flux elements that minimizes the hot spot temperatures. The influence of Graetz number and the number of unequal heat flux elements on the temperature reduction is studied. For instance, compared with the case of uniform heating, it is shown that the hot spot temperature is reduced up to 25% in the case of four unequal heat flux element under the influence of intermediate values of Graetz number.

Suggested Citation

  • Hajmohammadi, M.R. & Rahmani, M. & Campo, A. & Joneydi Shariatzadeh, O., 2014. "Optimal design of unequal heat flux elements for optimized heat transfer inside a rectangular duct," Energy, Elsevier, vol. 68(C), pages 609-616.
    • Handle: RePEc:eee:energy:v:68:y:2014:i:c:p:609-616
    DOI: 10.1016/j.energy.2014.02.011
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544214001443
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2014.02.011?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Wei, Shuhuan & Chen, Lingen & Sun, Fengrui, 2009. "The area-point constructal optimization for discrete variable cross-section conducting path," Applied Energy, Elsevier, vol. 86(7-8), pages 1111-1118, July.
    2. Hajmohammadi, M.R. & Eskandari, H. & Saffar-Avval, M. & Campo, A., 2013. "A new configuration of bend tubes for compound optimization of heat and fluid flow," Energy, Elsevier, vol. 62(C), pages 418-424.
    3. Huang, Yu-Xian & Wang, Xiao-Dong & Cheng, Chin-Hsiang & Lin, David Ta-Wei, 2013. "Geometry optimization of thermoelectric coolers using simplified conjugate-gradient method," Energy, Elsevier, vol. 59(C), pages 689-697.
    4. da Silva, A.K. & Lorente, S. & Bejan, A., 2006. "Constructal multi-scale structures for maximal heat transfer density," Energy, Elsevier, vol. 31(5), pages 620-635.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Feng, Huijun & Xie, Zhuojun & Chen, Lingen & Wu, Zhixiang & Xia, Shaojun, 2020. "Constructal design for supercharged boiler superheater," Energy, Elsevier, vol. 191(C).
    2. Trumpy, Eugenio & Bertani, Ruggero & Manzella, Adele & Sander, Marietta, 2015. "The web-oriented framework of the world geothermal production database: A business intelligence platform for wide data distribution and analysis," Renewable Energy, Elsevier, vol. 74(C), pages 379-389.
    3. Feng, Huijun & Chen, Lingen & Xie, Zhihui & Sun, Fengrui, 2015. "“Disc-point” heat and mass transfer constructal optimization for solid–gas reactors based on entropy generation minimization," Energy, Elsevier, vol. 83(C), pages 431-437.
    4. Anand, Vishal, 2014. "Slip law effects on heat transfer and entropy generation of pressure driven flow of a power law fluid in a microchannel under uniform heat flux boundary condition," Energy, Elsevier, vol. 76(C), pages 716-732.
    5. Lucia, Umberto, 2016. "Econophysics and bio-chemical engineering thermodynamics: The exergetic analysis of a municipality," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 462(C), pages 421-430.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Lucia, Umberto, 2014. "Thermodynamic approach to nano-properties of cell membrane," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 407(C), pages 185-191.
    2. Lucia, Umberto, 2014. "Entropy generation approach to cell systems," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 406(C), pages 1-11.
    3. Trumpy, Eugenio & Bertani, Ruggero & Manzella, Adele & Sander, Marietta, 2015. "The web-oriented framework of the world geothermal production database: A business intelligence platform for wide data distribution and analysis," Renewable Energy, Elsevier, vol. 74(C), pages 379-389.
    4. Rahimi, Elnaz & Babapoor, Aziz & Moradi, Gholamreza & Kalantari, Saba & Monazzam Esmaeelpour, Mohammadreza, 2024. "Personal cooling garments and phase change materials: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 190(PB).
    5. Liu, Haowen & Li, Guiqiang & Zhao, Xudong & Ma, Xiaoli & Shen, Chao, 2023. "Investigation of the impact of the thermoelectric geometry on the cooling performance and thermal—mechanic characteristics in a thermoelectric cooler," Energy, Elsevier, vol. 267(C).
    6. Baïri, A., 2008. "Transient thermal characteristics of airborne electronic equipment with discrete hot bands in square cavities," Applied Energy, Elsevier, vol. 85(10), pages 951-967, October.
    7. Sun, Henan & Ge, Ya & Liu, Wei & Liu, Zhichun, 2019. "Geometric optimization of two-stage thermoelectric generator using genetic algorithms and thermodynamic analysis," Energy, Elsevier, vol. 171(C), pages 37-48.
    8. Lucia, Umberto, 2014. "Entropy generation and cell growth with comments for a thermodynamic anticancer approach," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 406(C), pages 107-118.
    9. Kaluri, Ram Satish & Basak, Tanmay, 2010. "Analysis of distributed thermal management policy for energy-efficient processing of materials by natural convection," Energy, Elsevier, vol. 35(12), pages 5093-5107.
    10. Umberto Lucia, 2014. "The Gouy-Stodola Theorem in Bioenergetic Analysis of Living Systems (Irreversibility in Bioenergetics of Living Systems)," Energies, MDPI, vol. 7(9), pages 1-23, September.
    11. Hao, Junhong & Qiu, Huachen & Ren, Jianxun & Ge, Zhihua & Chen, Qun & Du, Xiaoze, 2020. "Multi-parameters analysis and optimization of a typical thermoelectric cooler based on the dimensional analysis and experimental validation," Energy, Elsevier, vol. 205(C).
    12. Chen, Wei-Hsin & Huang, Shih-Rong & Lin, Yu-Li, 2015. "Performance analysis and optimum operation of a thermoelectric generator by Taguchi method," Applied Energy, Elsevier, vol. 158(C), pages 44-54.
    13. Hadidi, Amin, 2017. "A novel approach for optimization of electrically serial two-stage thermoelectric refrigeration systems using chemical reaction optimization (CRO) algorithm," Energy, Elsevier, vol. 140(P1), pages 170-184.
    14. Chin-Hsiang Cheng & Yu-Ting Lin, 2022. "Computational Optimization of Free-Piston Stirling Engine by Variable-Step Simplified Conjugate Gradient Method with Compatible Strategies," Energies, MDPI, vol. 15(10), pages 1-16, May.
    15. Lucia, Umberto, 2016. "Econophysics and bio-chemical engineering thermodynamics: The exergetic analysis of a municipality," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 462(C), pages 421-430.
    16. Jiang, Le & Zhang, Hengyun & Li, Junwei & Xia, Peng, 2019. "Thermal performance of a cylindrical battery module impregnated with PCM composite based on thermoelectric cooling," Energy, Elsevier, vol. 188(C).
    17. Tianbo Lu & Yuqiang Li & Jianxin Zhang & Pingfan Ning & Pingjuan Niu, 2020. "Cooling and Mechanical Performance Analysis of a Trapezoidal Thermoelectric Cooler with Variable Cross-Section," Energies, MDPI, vol. 13(22), pages 1-19, November.
    18. Wang, Xiao-Dong & Wang, Qiu-Hong & Xu, Jin-Liang, 2014. "Performance analysis of two-stage TECs (thermoelectric coolers) using a three-dimensional heat-electricity coupled model," Energy, Elsevier, vol. 65(C), pages 419-429.
    19. Anand, Vishal, 2014. "Slip law effects on heat transfer and entropy generation of pressure driven flow of a power law fluid in a microchannel under uniform heat flux boundary condition," Energy, Elsevier, vol. 76(C), pages 716-732.
    20. Loau Al-Bahrani & Mehdi Seyedmahmoudian & Ben Horan & Alex Stojcevski, 2021. "Solving the Real Power Limitations in the Dynamic Economic Dispatch of Large-Scale Thermal Power Units under the Effects of Valve-Point Loading and Ramp-Rate Limitations," Sustainability, MDPI, vol. 13(3), pages 1-26, January.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:68:y:2014:i:c:p:609-616. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.