IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v36y2011i8p5065-5080.html
   My bibliography  Save this article

Entropy generation due to natural convection in discretely heated porous square cavities

Author

Listed:
  • Kaluri, Ram Satish
  • Basak, Tanmay

Abstract

Optimization of industrial processes for higher energy efficiency may be effectively carried out based on the thermodynamic approach of entropy generation minimization (EGM). This approach provides the key insights on how the available energy (exergy) is being destroyed during the process and the ways to minimize its destruction. In this study, EGM approach is implemented for the analysis of optimal thermal mixing and temperature uniformity due to natural convection in square cavities filled with porous medium for the material processing applications. Effect of the permeability of the porous medium and the role of distributed heating in enhancing the thermal mixing, temperature uniformity and minimization of entropy generation is analyzed. It is found that at lower Darcy number (Da), the thermal mixing is low and the heat transfer irreversibility dominates the total entropy generation. In contrast, thermal mixing is improved due to enhanced convection at higher Da. Friction irreversibility is found to dominate the total entropy generation for higher Prandtl number (Pr) fluids at higher Da, whereas the heat transfer irreversibility dominates the total entropy generation for lower Pr fluids. Based on EGM analysis, it is established that larger thermal mixing at high Darcy number may not be always recommended as the total entropy production is quite large at high Darcy number. Overall, it is found that the distributed heating methodology with multiple heat sources may be an efficient strategy for the optimal thermal processing of materials.

Suggested Citation

  • Kaluri, Ram Satish & Basak, Tanmay, 2011. "Entropy generation due to natural convection in discretely heated porous square cavities," Energy, Elsevier, vol. 36(8), pages 5065-5080.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:8:p:5065-5080
    DOI: 10.1016/j.energy.2011.06.001
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544211003781
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2011.06.001?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. Nwosu, Nwachukwu P., 2010. "Employing exergy-optimized pin fins in the design of an absorber in a solar air heater," Energy, Elsevier, vol. 35(2), pages 571-575.
    2. Guo, Jiangfeng & Xu, Mingtian & Cheng, Lin, 2010. "Thermodynamic analysis of waste heat power generation system," Energy, Elsevier, vol. 35(7), pages 2824-2835.
    3. Abbassi, H., 2007. "Entropy generation analysis in a uniformly heated microchannel heat sink," Energy, Elsevier, vol. 32(10), pages 1932-1947.
    4. Nakonieczny, K., 2002. "Entropy generation in a diesel engine turbocharging system," Energy, Elsevier, vol. 27(11), pages 1027-1056.
    5. Kotcioglu, Isak & Caliskan, Sinan & Cansiz, Ahmet & Baskaya, Senol, 2010. "Second law analysis and heat transfer in a cross-flow heat exchanger with a new winglet-type vortex generator," Energy, Elsevier, vol. 35(9), pages 3686-3695.
    6. Sciacovelli, Adriano & Verda, Vittorio, 2009. "Entropy generation analysis in a monolithic-type solid oxide fuel cell (SOFC)," Energy, Elsevier, vol. 34(7), pages 850-865.
    7. Satapathy, Ashok K., 2009. "Thermodynamic optimization of a coiled tube heat exchanger under constant wall heat flux condition," Energy, Elsevier, vol. 34(9), pages 1122-1126.
    8. Ordonez, Juan Carlos & Bejan, Adrian, 2003. "Minimum power requirement for environmental control of aircraft," Energy, Elsevier, vol. 28(12), pages 1183-1202.
    9. Bidi, M. & Nobari, M.R.H. & Avval, M. Saffar, 2010. "A numerical evaluation of combustion in porous media by EGM (Entropy Generation Minimization)," Energy, Elsevier, vol. 35(8), pages 3483-3500.
    10. Torres-Reyes, E. & Navarrete-González, J.J. & Cervantes-de Gortari, J.G., 2004. "Thermodynamic optimization as an effective tool to design solar heating systems," Energy, Elsevier, vol. 29(12), pages 2305-2315.
    11. Revellin, Rémi & Lips, Stéphane & Khandekar, Sameer & Bonjour, Jocelyn, 2009. "Local entropy generation for saturated two-phase flow," Energy, Elsevier, vol. 34(9), pages 1113-1121.
    12. Maveety, J.G. & Razani, A., 1996. "A two-dimensional numerical investigation of the optimal removal time and entropy production rate for a sensible thermal storage system," Energy, Elsevier, vol. 21(12), pages 1265-1276.
    13. Johannessen, Eivind & Kjelstrup, Signe, 2004. "Minimum entropy production rate in plug flow reactors: An optimal control problem solved for SO2 oxidation," Energy, Elsevier, vol. 29(12), pages 2403-2423.
    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. Zhou, Ling & Hang, Jianwei & Bai, Ling & Krzemianowski, Zbigniew & El-Emam, Mahmoud A. & Yasser, Eman & Agarwal, Ramesh, 2022. "Application of entropy production theory for energy losses and other investigation in pumps and turbines: A review," Applied Energy, Elsevier, vol. 318(C).
    2. Kefayati, G.H.R., 2016. "Simulation of double diffusive MHD (magnetohydrodynamic) natural convection and entropy generation in an open cavity filled with power-law fluids in the presence of Soret and Dufour effects (part II: ," Energy, Elsevier, vol. 107(C), pages 917-959.
    3. El-Behery, Samy M. & Hussien, A.A. & Kotb, H. & El-Shafie, Mostafa, 2017. "Performance evaluation of industrial glass furnace regenerator," Energy, Elsevier, vol. 119(C), pages 1119-1130.
    4. Feng, Jing-Chun & Wang, Yi & Li, Xiao-Sen, 2016. "Energy and entropy analyses of hydrate dissociation in different scales of hydrate simulator," Energy, Elsevier, vol. 102(C), pages 176-186.
    5. Ibáñez, Guillermo & López, Aracely & Pantoja, Joel & Moreira, Joel & Reyes, Juan A., 2013. "Optimum slip flow based on the minimization of entropy generation in parallel plate microchannels," Energy, Elsevier, vol. 50(C), pages 143-149.
    6. Mahian, Omid & Mahmud, Shohel & Heris, Saeed Zeinali, 2012. "Analysis of entropy generation between co-rotating cylinders using nanofluids," Energy, Elsevier, vol. 44(1), pages 438-446.
    7. Rashidi, M.M. & Ali, M. & Freidoonimehr, N. & Nazari, F., 2013. "Parametric analysis and optimization of entropy generation in unsteady MHD flow over a stretching rotating disk using artificial neural network and particle swarm optimization algorithm," Energy, Elsevier, vol. 55(C), pages 497-510.
    8. Biswal, Pratibha & Basak, Tanmay, 2017. "Entropy generation vs energy efficiency for natural convection based energy flow in enclosures and various applications: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 80(C), pages 1412-1457.
    9. Cheng, Xuetao & Liang, Xingang, 2012. "Heat-work conversion optimization of one-stream heat exchanger networks," Energy, Elsevier, vol. 47(1), pages 421-429.
    10. Chia Sun, 2014. "Combining grey relation analysis and entropy model for evaluating the operational performance: an empirical study," Quality & Quantity: International Journal of Methodology, Springer, vol. 48(3), pages 1589-1600, May.
    11. El-Shafie, Mostafa & Kambara, Shinji & Hayakawa, Yukio & Hussien, A.A., 2021. "Integration between energy and exergy analyses to assess the performance of furnace regenerative and ammonia decomposition systems," Renewable Energy, Elsevier, vol. 175(C), pages 232-243.
    12. Saidi, Majid & Karimi, Gholamreza, 2014. "Free convection cooling in modified L-shape enclosures using copper–water nanofluid," Energy, Elsevier, vol. 70(C), pages 251-271.
    13. Huang, Kefeng & Karimi, I.A., 2016. "Work-heat exchanger network synthesis (WHENS)," Energy, Elsevier, vol. 113(C), pages 1006-1017.
    14. Bhardwaj, Saurabh & Dalal, Amaresh & Pati, Sukumar, 2015. "Influence of wavy wall and non-uniform heating on natural convection heat transfer and entropy generation inside porous complex enclosure," Energy, Elsevier, vol. 79(C), pages 467-481.
    15. Xiaoping Chen & Xiaoming Zhang & Xiaojun Li, 2022. "Evolution Characteristics of Energy Change Field in a Centrifugal Pump during Rapid Starting Period," Energies, MDPI, vol. 15(22), pages 1-15, November.
    16. Cheng, Xuetao & Liang, Xingang, 2012. "Optimization principles for two-stream heat exchangers and two-stream heat exchanger networks," Energy, Elsevier, vol. 46(1), pages 386-392.

    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. Sciacovelli, A. & Verda, V. & Sciubba, E., 2015. "Entropy generation analysis as a design tool—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 1167-1181.
    2. Roy, Monisha & Roy, S. & Basak, Tanmay, 2015. "Role of various moving walls on energy transfer rates via heat flow visualization during mixed convection in square cavities," Energy, Elsevier, vol. 82(C), pages 1-22.
    3. Ibáñez, Guillermo & Cuevas, Sergio, 2010. "Entropy generation minimization of a MHD (magnetohydrodynamic) flow in a microchannel," Energy, Elsevier, vol. 35(10), pages 4149-4155.
    4. Ibáñez, Guillermo & López, Aracely & Pantoja, Joel & Moreira, Joel & Reyes, Juan A., 2013. "Optimum slip flow based on the minimization of entropy generation in parallel plate microchannels," Energy, Elsevier, vol. 50(C), pages 143-149.
    5. Xu, Mingtian, 2012. "Variational principles in terms of entransy for heat transfer," Energy, Elsevier, vol. 44(1), pages 973-977.
    6. Sheikholeslami, M. & Ganji, D.D., 2016. "Heat transfer enhancement in an air to water heat exchanger with discontinuous helical turbulators; experimental and numerical studies," Energy, Elsevier, vol. 116(P1), pages 341-352.
    7. Ahadi, Mohammad & Abbassi, Abbas, 2015. "Entropy generation analysis of laminar forced convection through uniformly heated helical coils considering effects of high length and heat flux and temperature dependence of thermophysical properties," Energy, Elsevier, vol. 82(C), pages 322-332.
    8. Fudholi, Ahmad & Sopian, Kamaruzzaman, 2019. "A review of solar air flat plate collector for drying application," Renewable and Sustainable Energy Reviews, Elsevier, vol. 102(C), pages 333-345.
    9. Shamshiri, Mehdi & Ashrafizaadeh, Mahmud & Shirani, Ebrahim, 2012. "Effects of rarefaction, viscous dissipation and rotation mode on the first and second law analyses of rarefied gaseous slip flows confined between a rotating shaft and its concentric housing," Energy, Elsevier, vol. 37(1), pages 359-370.
    10. Amani, E. & Nobari, M.R.H., 2011. "A numerical investigation of entropy generation in the entrance region of curved pipes at constant wall temperature," Energy, Elsevier, vol. 36(8), pages 4909-4918.
    11. Sertkaya, Ahmet Ali & Bilir, Şefik & Kargıcı, Suna, 2011. "Experimental investigation of the effects of orientation angle on heat transfer performance of pin-finned surfaces in natural convection," Energy, Elsevier, vol. 36(3), pages 1513-1517.
    12. Pahlevaninezhad, Masoud & Davazdah Emami, Mohsen & Panjepour, Masoud, 2014. "The effects of kinetic parameters on combustion characteristics in a sintering bed," Energy, Elsevier, vol. 73(C), pages 160-176.
    13. Utlu, Zafer, 2015. "Investigation of the potential for heat recovery at low, medium, and high stages in the Turkish industrial sector (TIS): An application," Energy, Elsevier, vol. 81(C), pages 394-405.
    14. Nunes, T.K. & Vargas, J.V.C. & Ordonez, J.C. & Shah, D. & Martinho, L.C.S., 2015. "Modeling, simulation and optimization of a vapor compression refrigeration system dynamic and steady state response," Applied Energy, Elsevier, vol. 158(C), pages 540-555.
    15. Fu, Jianqin & Liu, Jingping & Ren, Chengqin & Wang, Linjun & Deng, Banglin & Xu, Zhengxin, 2012. "An open steam power cycle used for IC engine exhaust gas energy recovery," Energy, Elsevier, vol. 44(1), pages 544-554.
    16. Guo, Jiangfeng & Huai, Xiulan, 2012. "Optimization design of recuperator in a chemical heat pump system based on entransy dissipation theory," Energy, Elsevier, vol. 41(1), pages 335-343.
    17. Khoshvaght-Aliabadi, M. & Sartipzadeh, O. & Alizadeh, A., 2015. "An experimental study on vortex-generator insert with different arrangements of delta-winglets," Energy, Elsevier, vol. 82(C), pages 629-639.
    18. Akpinar, Ebru Kavak & Koçyigit, Fatih, 2010. "Energy and exergy analysis of a new flat-plate solar air heater having different obstacles on absorber plates," Applied Energy, Elsevier, vol. 87(11), pages 3438-3450, November.
    19. Yang, Yuanchao & Gao, Zichen, 2019. "Power optimization of the environmental control system for the civil more electric aircraft," Energy, Elsevier, vol. 172(C), pages 196-206.
    20. Li, Xianglin & Faghri, Amir, 2011. "Local entropy generation analysis on passive high-concentration DMFCs (direct methanol fuel cell) with different cell structures," Energy, Elsevier, vol. 36(1), pages 403-414.

    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:36:y:2011:i:8:p:5065-5080. 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.