Abstract
A comparative heat transfer performance of an internally grooved anodized thermosyphon with eco-friendly refrigerants is presented in this study. Thermosiphons are fabricated with 50 numbers of axial micro-grooves having a width of 500 μm and a depth of 550 μm that is formed using an electrical discharge machining process. The micro-grooved surface was then anodized and characterized using SEM as well as DSA 25 drop shape analyzer. Later, the heat transfer performance of non-anodized grooved thermosyphon is studied by varying fill ratio (20-80 %), inclination angle (0-90°), and heat inputs (5-50 W). The heat transfer coefficient of the thermosyphon is improved by anodization by 20.9 %, 17.2 %, and 18.1 %, respectively, with R717, R134a, and R600a at optimum circumstances (30 % fill ratio and 60° inclination angle). Due to the performance enhancement and zero global warming potential of R717, an anodized surface with the same is recommended for a wide range of heat transfer applications.
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Abbreviations
- D :
-
Depth of the groove (m)
- W :
-
Width of the groove (m)
- σ :
-
Surface tension (N/m)
- ϩ:
-
Coating thickness (m)
- V in :
-
Voltage (v)
- I in :
-
Current (A)
- Q in :
-
Heat input (Watts)
- L eff :
-
Effective length of thermosyphon (mm)
- μ l :
-
Liquid viscosity (Ns/m2)
- μ v :
-
Vapour viscosity (Ns/m2)
- ρ i :
-
Liquid density (Kg/m3)
- ρ v :
-
Vapour density (Kg/m3)
- A :
-
Heat transfer area (m2)
- λ :
-
Latent heat of vaporization (J/kg)
- m rate :
-
Mass flow rate (kg/s)
- C pl :
-
Specific heat capacity of liquid (J/kgK)
- T :
-
Temperature (°C)
- Q out :
-
Heat rejected from the condenser (kg/s)
- G :
-
Acceleration due to gravity (m/s2)
- L t :
-
Total length (mm)
- R th :
-
Thermal resistance (°C/W)
- h :
-
Heat transfer coefficient (W/m2. °C)
- GT :
-
Grooved thermosyphon
- LPH :
-
Liters per hour
- θ :
-
Inclination angle
- in :
-
Inlet
- out :
-
Outlet
- eff :
-
Effective
- t :
-
Thermosyphon
- p :
-
Pressure
- v :
-
Vapour
- l :
-
Liquid
- c, w :
-
Condenser wall
- e, w :
-
Evaporator wall
References
M. Mohammadifar, E. Rasouli and M. R. Hajmohammadi, Optimal design and placement of heat sink elements attached on a cylindrical heat-generating body for maximum cooling performance, Thermochim. Acta. (2021) 3–5.
S. M. Ayatollahi, A. Ahmadpour and M. R. Hajmohammadi, Performance evaluation and optimization of flattened microchannel heat sinks for the electronic cooling application, J. Therm. Anal. Calorim., March (2021) 1–16.
M. R. Hajmohammadi and M. Mohammadifar, Optimal placement and sizing of heat sink attachments on a heat-generating piece for minimization of peak temperature, Thermochim. Acta., 689 (2020) 178645.
M. R. Hajmohammadi, E. Rasouli and M. A. Elmi, Geometric optimization of a highly conductive insert intruding an annular fin, Int. J. Heat Mass Transf., 146 (2020) 118910.
T. Wu et al., Multitasking multi-objective operation optimization of integrated energy system considering biogas-solar-wind renewables, Energy Convers. Manag., 229 (2021) 3–5.
G. Murali, K. Mayilsamy and T. V Arjunan, An experimental study of PCM incorporated thermosyphon solar water heating system, Int. J. Green Energy, 12(9) (2015) 1–43.
H. Jouhara and A. J. Robinson, Experimental investigation of small diameter two-phase closed thermosyphons charged with water, FC-84, FC-77 and FC-3283, Appl. Therm. Eng., 30(2–3) (2010) 201–211.
V. Kiseev and O. Sazhin, Heat transfer enhancement in a loop thermosyphon using nanoparticles/water nanofluid, Int. J. Heat Mass Transf., 132 (2019) 557–564.
A. Ozsoy and V. Corumlu, Thermal performance of a thermosyphon heat pipe evacuated tube solar collector using silver-water nanofluid for commercial applications, Renew. Energy., 122 (2018) 26–34.
T. Grab et al., Operation performance of thermosyphons employing titania and gold nanofluids, Int. J. Therm. Sci., 86 (2014) 352–364.
M. Ramezanizadeh, M. A. Nazari and M. Hossein, Experimental and numerical analysis of a nanofluidic thermosyphon heat exchanger, Eng. Appl. Comput. Fluid Mech., 13(1) (2019) 40–47.
H. Ghorabaee et al., Effect of nanofluid and surfactant on thermosyphon heat pipe performance, Heat Transf. Eng., 41(20) (2019) 1829–1842.
A. Kujawska et al., Impact of silica nanofluid deposition on thermosyphon performance, Heat Transf. Eng. (2020).
S. Torii, Y. Satou and Y. Koito, Experimental study on convective thermal-fluid flow transport phenomena in circular tube using nanofluids, Int. J. Green Energy., 7(3) (2010) 289–299.
S. H. Oh et al., Experimental study on heat transfer performance of a two-phase single thermosyphon using HFE-7100, J. Mech. Sci. Technol., 31(10) (2017) 4957–4964.
S. Wannapakhe et al., Heat transfer rate of a closed-loop oscillating heat pipe with check valves using silver nanofluid as working fluid, J. Mech. Sci. Technol., 23(6) (2009) 1576–1582.
A. Ozsoy and R. Yildirim, The performance of ground source heat pipes at low constant source temperatures, Int. J. Green Energy, 15(11) (2018) 641–650.
A. R. Anand, Investigations on effect of evaporator length on heat transport of axially grooved ammonia heat pipe, Appl. Therm. Eng., 150 (2019) 1233–1242.
A. L. Sriram et al., Application of environment-friendly refrigerants in anodized grooved thermosyphon at high heat loads, Mater. Today Proc, 46 (2021) 138–140.
M. Esen, Thermal performance of a solar cooker integrated vacuum-tube collector with heat pipes containing different refrigerants, Solar Energy, 76 (2004) 751–757.
M. Esen and H. Esen, Experimental investigation of a two-phase closed thermosyphon solar water heater, 79(5) (2005) 459–468.
R. Nair and C. Balaji, Synergistic analysis of heat transfer characteristics of an internally finned two phase closed thermosyphon, Appl. Therm. Eng., 101 (2016) 720–729.
S. F. Li et al., Effect of nano-structure coating on thermal performance of thermosyphon boiling in micro-channels, Int. J. Heat Mass Transf., 124 (2018) 463–474.
Y. Naresh and C. Balaji, Thermal performance of an internally finned two phase closed thermosyphon with refrigerant R134a: A combined experimental and numerical study, Int. J. Therm. Sci., 126 (2018) 281–293.
Y. Naresh and C. Balaji, Experimental investigations of heat transfer from an internally finned two phase closed thermosyphon, Appl. Therm. Eng., 112 (2017) 1658–1666.
T. Sukchana and N. Pratinthong, Effect of bending position on heat transfer performance of R-134a two-phase close loop thermosyphon with an adiabatic section using flexible hoses, Int. J. Heat Mass Transf., 114 (2017) 527–535.
A. Bahmanabadi, M. Faegh and M. B. Shafii, Experimental examination of utilizing novel radially grooved surfaces in the evaporator of a thermosyphon heat pipe, Appl. Therm. Eng., 169 (2020) 114975.
Y. Kim et al., Effect of sintered microporous coating at the evaporator on the thermal performance of a two-phase closed thermosyphon, Int. J. Heat Mass Transf, 131 (2019) 1064–1074.
Y. Kim et al., Enhanced thermal performance of a thermosyphon for waste heat recovery: Microporous coating at evaporator and hydrophobic coating at condenser, Appl. Therm. Eng., 175 (2020) 115332.
P. Taylor et al., A study of the heat transfer characteristics of an FC-72 (C6F14) two-phase closed thermosyphon with helical grooves on the inner surface, Heat Transf. Eng., 25(8) (2004) 60–68.
V. V Nirgude and S. K. Sahu, Nucleate boiling heat transfer performance of different laser processed copper surfaces, Int. J. Green Energy, 17(1) (2019) 38–47.
Y. D. Ling and S. Torii, Heat transfer enhancements in heat pipe constructed with a copper porous microstructure, Int. J. Green Energy, 18(2) (2020) 166–171.
W. Pinate, S. Rittidech and P. Meena, Critical heat flux of a two-phase closed thermosyphon with fins, J. Mech. Sci. Technol., 32(5) (2018) 2357–2364.
A. B. Solomon et al., Performance enhancement of a two-phase closed thermosiphon with a thin porous copper coating, Int. Commun. Heat Mass Transf, 82 (2017) 9–19.
A. B. Solomon et al., Characterization of a grooved heat pipe with an anodized surface, Heat Mass Transf.Und Stoffuebertragung, 53(3) (2017) 753–763.
A. B. Solomon et al., Heat transfer performance of an anodized two-phase closed thermosyphon with refrigerant as working fluid, Int. J. Heat Mass Transf., 82 (2015) 521–529.
R. R. Singh et al., Effect of anodization on the heat transfer performance of flat thermosyphon, Exp. Therm. Fluid Sci., 68 (2015) 574–581.
R. R. Singh and A. B. Solomon, Effect of nucleation sites on the performance of anodized thermosyphon, 1st Int. ISHMT-ASTFE Heat Mass Transf. Conf. (2015) 1–7.
A. B. Solomon and M. Noel, Anodization and evaluation of an aluminium thermosyphon with anodized inner wall surface, Energ (2015) 1–9.
H. C. Weng and M. H. Yang, Heat transfer performance enhancement of gravity heat pipes by growing aao nanotubes on inner wall surface, Inventions, 3(42) (2018) 1–12.
A. Varughese et al., Heat transfer characteristics and flow visualization of anodized flat thermosiphon, Proc. Inst. Mech. Eng. Part E J. Process Mech. Eng., 234(2) (2020) 182–192.
S. H. Noie, M. R. S. Emami and M. Khoshnoodi, Effect of inclination angle and filling ratio on thermal performance of a two-phase closed thermosyphon under normal operating conditions, Heat Transf. Eng., 28(4) (2007) 365–371.
ASHRAE, Hand Book: Fundamentals, Chapter 30-Thermophysical Properties of Refrigerants, EBSCO Publ. USA, 718 (2009) 1–39.
A. Faghri, Heat Pipe Science and Technology, Taylor and Farncis, London (1995).
W. M. H. R. D. Goodwin, Thermophysical Properties of Isobutane from 114 to 700K at Pressures to 70 MPa, NBS Publ. (1982) 1–200.
T. Q. J. Fryer and K. Lee, Methods of Calculating Total Equivalent Warming Impact (TEWI), Aust. Inst. Refrig. Air Cond. Heat. (2012) 21.
L. L. Vasil’ev et al., Investigation of heat transfer by evaporation in capillary grooves with a porous coating, J. Eng. Phys. Thermophys., 85(2) (2012) 407–414.
H. Gurbuz, The effect of H2 purity on the combustion, performance, emissions, and energy costs, Therm. Sci., 24(1A) (2020) 37–49.
H. Gürbüz, Evaluating effects of the Covid-19 pandemic period on energy consumption and enviro-economic indicators of Turkish road transportation, Energy Sources, Part A: Recover. Util. Environ. Eff. (2021) 1–4.
H. Gürbüz, Ş. Yasin and H. Akçay, Environmental and enviroeconomic assessment of an LPG fueled SI engine at partial load, J. Environ. Manage., 241 (2019) 631–636.
Ş. Yasin and H. Gürbüz, A comparison of gasoline, liquid petroleum gas, and hydrogen utilization in an spark ignition engine in terms of environmental and economic indicators, J. Energy Resour. Technol., 143(5) (2021) 052301–052309.
Acknowledgement
The authors are grateful to the DST-SERB (DST/SERB/YSS/2015/001084) for financially supporting this research work. The authors also express their gratitude to Mr. Jayaseelan, Karunya Institute of Technology and Sciences, for assisting fabrication and testing.
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Sriram Sudhan is currently working as a junior research fellow in the Mechanical Engineering Department at Karunya Institute of Technology and Sciences (KITS), Coimbatore. He is currently pursuing his Ph.D. in the area of electronic cooling. He has published 2 peer reviewed journal papers and 3 international conference papers.
Brusly Solomon is currently an Associate Professor in the Mechanical Engineering discipline at Karunya Institute of Technology and Sciences (KITS), Coim-batore. His research focuses on developing phase-change cooling devices such as heat pipes and thermosyphons for cooling applications. He has published over 40 articles in peer-reviewed international journals, 2 book chapters and over eight international conference proceedings. His research interests include phase change heat transfer, electronic cooling with heat pipes, natural convection heat transfer and Magnetic nanofluids.
Darwin Immanuel is currently a post graduate student in the Mechanical Engineering Department at Karunya Institute of Technology and Sciences (KITS), Coimbatore. His research interests focused on developing anodized grooved heat pipes for electronic cooling applications.
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Sudhan, A.L.S., Solomon, A.B. & Immanuel, I.D. Comparative study on the heat transfer performance of micro-grooved anodized thermosyphon with R134a, R600a and R717 for low-temperature applications. J Mech Sci Technol 35, 5213–5223 (2021). https://doi.org/10.1007/s12206-021-1038-6
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DOI: https://doi.org/10.1007/s12206-021-1038-6