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Experimental investigation of wraparound loop heat pipe heat exchanger used in energy efficient air handling units

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  • Jouhara, Hussam
  • Meskimmon, Richard

Abstract

Building legislation along with environmental and comfort concerns are increasingly driving designers of building services and air conditioning equipment towards more energy efficient solutions. Heat pipe technology is emerging as a viable, efficient and environmentally-sound technology for applications in efficient air handling unit designs. In this paper, an experimental investigation on the thermal performance of an air-to-air heat exchanger, which utilises heat pipe technology, will be presented. The heat exchanger consisted of 7 loop heat pipes with finned evaporator and condenser sections. The heat exchanger was fully instrumented to test for the effect of the variation of heat load and the air velocity, through the heat exchanger, on the overall thermal resistance of the loops. The values of the effectiveness of the heat pipe heat exchanger are shown to vary with the air velocity as expected but the results also allow the prediction of effectiveness variation with the heat load and operating temperature (previously assumed to be constant). The results allow an interpretation of the overall thermal performance of each loop heat pipe as a function of the load and air velocity. The paper concludes with a theoretical analysis of the energy savings that would be expected when utilising the technology in a representative application.

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  • Jouhara, Hussam & Meskimmon, Richard, 2010. "Experimental investigation of wraparound loop heat pipe heat exchanger used in energy efficient air handling units," Energy, Elsevier, vol. 35(12), pages 4592-4599.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:12:p:4592-4599
    DOI: 10.1016/j.energy.2010.03.056
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    2. Chan, C.W. & Siqueiros, E. & Ling-Chin, J. & Royapoor, M. & Roskilly, A.P., 2015. "Heat utilisation technologies: A critical review of heat pipes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 615-627.
    3. Jouhara, H. & Milko, J. & Danielewicz, J. & Sayegh, M.A. & Szulgowska-Zgrzywa, M. & Ramos, J.B. & Lester, S.P., 2016. "The performance of a novel flat heat pipe based thermal and PV/T (photovoltaic and thermal systems) solar collector that can be used as an energy-active building envelope material," Energy, Elsevier, vol. 108(C), pages 148-154.
    4. Jouhara, Hussam & Merchant, Hasnain, 2012. "Experimental investigation of a thermosyphon based heat exchanger used in energy efficient air handling units," Energy, Elsevier, vol. 39(1), pages 82-89.
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    6. Ignacio Carvajal-Mariscal & Jorge E. De León-Ruiz & Jorge Vázquez-Arenas & María Venegas, 2022. "Effect of Working Fluid-Filling Ratio Combination on Thermosyphon Performance as Add-In Enhancer for Indoor Air Conditioning Devices," Energies, MDPI, vol. 15(16), pages 1-15, August.
    7. Chernysheva, Mariya A. & Pastukhov, Vladimir G. & Maydanik, Yury F., 2013. "Analysis of heat exchange in the compensation chamber of a loop heat pipe," Energy, Elsevier, vol. 55(C), pages 253-262.
    8. Jouhara, Hussam & Almahmoud, Sulaiman & Brough, Daniel & Guichet, Valentin & Delpech, Bertrand & Chauhan, Amisha & Ahmad, Lujean & Serey, Nicolas, 2021. "Experimental and theoretical investigation of the performance of an air to water multi-pass heat pipe-based heat exchanger," Energy, Elsevier, vol. 219(C).
    9. Jouhara, H. & Szulgowska-Zgrzywa, M. & Sayegh, M.A. & Milko, J. & Danielewicz, J. & Nannou, T.K. & Lester, S.P., 2017. "The performance of a heat pipe based solar PV/T roof collector and its potential contribution in district heating applications," Energy, Elsevier, vol. 136(C), pages 117-125.
    10. Sarafraz, M.M. & Pourmehran, O. & Yang, B. & Arjomandi, M., 2019. "Assessment of the thermal performance of a thermosyphon heat pipe using zirconia-acetone nanofluids," Renewable Energy, Elsevier, vol. 136(C), pages 884-895.
    11. Ewa Zender–Świercz, 2021. "A Review of Heat Recovery in Ventilation," Energies, MDPI, vol. 14(6), pages 1-23, March.
    12. Alireza Esmaeilzadeh & Mahyar Silakhori & Nik Nazri Nik Ghazali & Hendrik Simon Cornelis Metselaar & Azuddin Bin Mamat & Mohammad Sajad Naghavi Sanjani & Soudeh Iranmanesh, 2020. "Thermal Performance and Numerical Simulation of the 1-Pyrene Carboxylic-Acid Functionalized Graphene Nanofluids in a Sintered Wick Heat Pipe," Energies, MDPI, vol. 13(24), pages 1-21, December.
    13. Jouhara, Hussam & Meskimmon, Richard, 2014. "Heat pipe based thermal management systems for energy-efficient data centres," Energy, Elsevier, vol. 77(C), pages 265-270.
    14. Bryś, Krystyna & Bryś, Tadeusz & Sayegh, Marderos Ara & Ojrzyńska, Hanna, 2020. "Characteristics of heat fluxes in subsurface shallow depth soil layer as a renewable thermal source for ground coupled heat pumps," Renewable Energy, Elsevier, vol. 146(C), pages 1846-1866.
    15. Danielewicz, J. & Sayegh, M.A. & Śniechowska, B. & Szulgowska-Zgrzywa, M. & Jouhara, H., 2014. "Experimental and analytical performance investigation of air to air two phase closed thermosyphon based heat exchangers," Energy, Elsevier, vol. 77(C), pages 82-87.
    16. Eui Guk Jung & Joon Hong Boo, 2019. "A Novel Analytical Modeling of a Loop Heat Pipe Employing the Thin-Film Theory: Part I—Modeling and Simulation," Energies, MDPI, vol. 12(12), pages 1-21, June.
    17. Zhang, Xingxing & Zhao, Xudong & Shen, Jingchun & Xu, Jihuan & Yu, Xiaotong, 2014. "Dynamic performance of a novel solar photovoltaic/loop-heat-pipe heat pump system," Applied Energy, Elsevier, vol. 114(C), pages 335-352.
    18. Natthakit Ritthong & Sommart Thongkom & Apichai Sawisit & Boonyabhorn Duangsa & Wirote Ritthong, 2024. "Optimization Design of Closed-Loop Thermosyphons: Experimentation and Computational Fluid Dynamics Modeling," Energies, MDPI, vol. 17(2), pages 1-18, January.
    19. Almahmoud, Sulaiman & Jouhara, Hussam, 2019. "Experimental and theoretical investigation on a radiative flat heat pipe heat exchanger," Energy, Elsevier, vol. 174(C), pages 972-984.
    20. Kundu, Balaram & Barman, Debasis, 2011. "An analytical prediction for performance and optimization of an annular fin assembly of trapezoidal profile under dehumidifying conditions," Energy, Elsevier, vol. 36(5), pages 2572-2588.
    21. Amini, Amir & Miller, Jeremy & Jouhara, Hussam, 2017. "An investigation into the use of the heat pipe technology in thermal energy storage heat exchangers," Energy, Elsevier, vol. 136(C), pages 163-172.
    22. Eui Guk Jung & Joon Hong Boo, 2019. "A Novel Analytical Modeling of a Loop Heat Pipe Employing Thin-Film Theory: Part II—Experimental Validation," Energies, MDPI, vol. 12(12), pages 1-15, June.
    23. Jouhara, Hussam & Ezzuddin, Hatem, 2013. "Thermal performance characteristics of a wraparound loop heat pipe (WLHP) charged with R134A," Energy, Elsevier, vol. 61(C), pages 128-138.

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