https://orcid.org/0000-0003-0715-3985
Abstract
The heat transfer performance of an oscillating heat pipe (OHP) was significantly enhanced by changing the inner wall surface wettability and filling ratios. Among the various wettability types, a hybrid surface, where the evaporator and condenser have different wettability, has shown enhancement of heat transfer performance significantly. The effects of different surface wettable vertical tubes are yet to be investigated. Therefore, in this study, a single-loop OHP with three different surface wettable vertical tubes, namely, alternate wettability OHP (AWOHP) were numerically investigated at different filling ratios of 30–90%. The different wettability rates of two vertical tubes caused an uneven distribution of slugs and plugs, which generated an unbalanced pressure difference between the tubes, thereby reducing the start-up time by 60–79%. The bulk mean temperature of the left and right adiabatic tubes was investigated to understand the nature of fluid flow. For filling ratios (FRs) of 30–70%, the right tube temperature was always higher than the left tube in AWOHP 3 (hydrophilic left tube, super-hydrophobic right tube), indicating unidirectional circulatory flow, with an occasional change in direction at 70% FR. At lower FR of 30%, AWOHP 2 (super-hydrophilic left tube, super-hydrophobic right tube) exhibited the highest heat transfer performance. In contrast, at higher FRs of 50–90%, AWOHP 3 exhibited the highest heat transfer performance with conductance (G) of 1075 W/m2 K at an FR of 70%, 55% higher than conventional oscillating heat pipe (COHP).
References
1.
Saha
, B. K.
, and Chakraborty
, B.
, 2017
, “Utilization of Low-Grade Waste Heat-to-Energy Technologies and Policy in Indian Industrial Sector: A Review
,” Clean Technol. Environ. Policy
, 19
, pp. 327
–347
.10.1007/s10098-016-1248-22.
Mahajan
, G.
, Thompson
, S. M.
, and Cho
, H.
, 2017
, “Energy and Cost Savings Potential of Oscillating Heat Pipes for Waste Heat Recovery Ventilation
,” Energy Rep.
, 3
, pp. 46
–53
.10.1016/j.egyr.2016.12.0023.
Xu
, Y.
, Xue
, Y.
, Cai
, W.
, Qi
, H.
, and Li
, Q.
, 2023
, “Experimental Study on Performances of Flat-Plate Pulsating Heat Pipes Without and With Thermoelectric Generators for Low-Grade Waste Heat Recovery
,” Appl. Therm. Eng.
, 225
, p. 120156
.10.1016/j.applthermaleng.2023.1201564.
Akachi
, H.
, 1990
, “Structure of Micro Heat Pipe
,” U.S. Patent No. 5,219,020.5.
Khandekar
, S.
, and Groll
, M.
, 2003
, “On the Definition of Pulsating Heat Pipes an Overview
,” Proceedings of the 5th Minsk International Conference (Heat Pipes, Heat Pumps and Refrigerators)
, Minsk, Belarus
, Sept. 8–11, pp. 707
–719
.http://www.porousmedialab.by/seminar/light/10.pdf6.
Khandekar
, S.
, and Groll
, M.
, 2004
, “An Insight Into Thermo-Hydrodynamic Coupling in Closed Loop Pulsating Heat Pipes
,” Int. J. Therm. Sci.
, 43
(1
), pp. 13
–20
.10.1016/S1290-0729(03)00100-57.
Holley
, B.
, and Faghri
, A.
, 2005
, “Analysis of Pulsating Heat Pipe With Capillary Wick and Varying Channel Diameter
,” Int. J. Heat Mass Transfer
, 48
(13
), pp. 2635
–2651
.10.1016/j.ijheatmasstransfer.2005.01.0138.
Karthikeyan
, V. K.
, Khandekar
, S.
, Pillai
, B. C.
, and Sharma
, P. K.
, 2014
, “Infrared Thermography of a Pulsating Heat Pipe: Flow Regimes and Multiple Steady States
,” Appl. Therm. Eng.
, 62
(2
), pp. 470
–480
.10.1016/j.applthermaleng.2013.09.0419.
Rittidech
, S.
, Pipatpaiboon
, N.
, and Terdtoon
, P.
, 2007
, “Heat-Transfer Characteristics of a Closed-Loop Oscillating Heat-Pipe With Check Valves
,” Appl. Energy
, 84
(5
), pp. 565
–577
.10.1016/j.apenergy.2006.09.01010.
Rittidech
, S.
, Pipatpaiboon
, N.
, and Thongdaeng
, S.
, 2010
, “Thermal Performance of Horizontal Closed-Loop Oscillating Heat-Pipe With Check Valves
,” J. Mech. Sci. Technol.
, 24
(2
), pp. 545
–550
.10.1007/s12206-009-1221-711.
Bhuwakietkumjohn
, N.
, and Rittidech
, S.
, 2010
, “Internal Flow Patterns on Heat Transfer Characteristics of a Closed-Loop Oscillating Heat-Pipe With Check Valves Using Ethanol and a Silver Nano-Ethanol Mixture
,” Exp. Therm. Fluid Sci.
, 34
(8
), pp. 1000
–1007
.10.1016/j.expthermflusci.2010.03.00312.
Thompson
, S. M.
, Ma
, H. B.
, and Wilson
, C.
, 2011
, “Investigation of a Flat-Plate Oscillating Heat Pipe With Tesla-Type Check Valves
,” Exp. Therm. Fluid Sci.
, 35
(7
), pp. 1265
–1273
.10.1016/j.expthermflusci.2011.04.01413.
de Vries
, S. F.
, Florea
, D.
, Homburg
, F. G. A.
, and Frijns
, A. J. H.
, 2017
, “Design and Operation of a Tesla-Type Valve for Pulsating Heat Pipes
,” Int. J. Heat Mass Transfer
, 105
, pp. 1
–11
.10.1016/j.ijheatmasstransfer.2016.09.06214.
Jang
, D. S.
, Ham
, S. H.
, Shin
, H. H.
, and Kim
, Y.
, 2024
, “Thermal Performance Improvement of a Radial Pulsating Heat Pipe With Diverging Channels by Adopting Tesla Valves at Various Heat Fluxes
,” Appl. Therm. Eng.
, 237
, p. 121799
.10.1016/j.applthermaleng.2023.12179915.
Wits
, W. W.
, Groeneveld
, G.
, and Van Gerner
, H. J.
, 2019
, “Experimental Investigation of a Flat-Plate Closed-Loop Pulsating Heat Pipe
,” ASME J. Heat Mass Transfer-Trans. ASME
, 141
(9
), p. 091807
.10.1115/1.404236716.
Feng
, C.
, Wan
, Z.
, Mo
, H.
, Tang
, H.
, Lu
, L.
, and Tang
, Y.
, 2018
, “Heat Transfer Characteristics of a Novel Closed-Loop Pulsating Heat Pipe With a Check Valve
,” Appl. Therm. Eng.
, 141
, pp. 558
–564
.10.1016/j.applthermaleng.2018.06.01017.
Wan
, Z.
, Wang
, X.
, and Feng
, C.
, 2020
, “Heat Transfer Performances of the Capillary Loop Pulsating Heat Pipes With Spring-Loaded Check Valve
,” Appl. Therm. Eng.
, 167
, p. 114803
.10.1016/j.applthermaleng.2019.11480318.
Ando
, M.
, Okamoto
, A.
, and Nagai
, H.
, 2021
, “Start-Up and Heat Transfer Characteristics of Oscillating Heat Pipe With Different Check Valve Layouts
,” Appl. Therm. Eng.
, 196
, p. 117286
.10.1016/j.applthermaleng.2021.11728619.
Ando
, M.
, Okamoto
, A.
, and Nagai
, H.
, 2023
, “Effect of Flow Resistance of Floating-Type Check Valves on Heat Transfer Characteristics of an Oscillating Heat Pipe
,” ASME J. Heat Mass Transfer-Trans. ASME
, 145
(10
), p. 101004
.10.1115/1.406278320.
Smyrnov
, G.
, 2002
, “
Method of Action of the Pulsating Heat Pipe, Its Construction and the Devices on Its Base
,” U.S. Patent No. 6,672,373.21.
Chiang
, C. M.
, Chien
, K. H.
, Chen
, H. M.
, and Wang
, C. C.
, 2012
, “Theoretical Study of Oscillatory Phenomena in a Horizontal Closed-Loop Pulsating Heat Pipe With Asymmetrical Arrayed Minichannel
,” Int. Commun. Heat Mass Transfer
, 39
(7
), pp. 923
–930
.10.1016/j.icheatmasstransfer.2012.05.01922.
Kwon
, G. H.
, and Kim
, S. J.
, 2014
, “Operational Characteristics of Pulsating Heat Pipes With a Dual-Diameter Tube
,” Int. J. Heat Mass Transfer
, 75
, pp. 184
–195
.10.1016/j.ijheatmasstransfer.2014.03.03223.
Kwon
, G. H.
, and Kim
, S. J.
, 2015
, “Experimental Investigation on the Thermal Performance of a Micro Pulsating Heat Pipe With a Dual-Diameter Channel
,” Int. J. Heat Mass Transfer
, 89
, pp. 817
–828
.10.1016/j.ijheatmasstransfer.2015.05.09124.
Wang
, J.
, Pan
, Y.
, and Liu
, X.
, 2021
, “Investigation on Start-Up and Thermal Performance of the Single-Loop Pulsating Heat Pipe With Variable Diameter
,” Int. J. Heat Mass Transfer
, 180
, p. 121811
.10.1016/j.ijheatmasstransfer.2021.12181125.
Liu
, Y.
, Dan
, D.
, Wei
, M.
, Zheng
, S.
, and Sun
, J.
, 2024
, “Numerical Investigation on the Start-Up and Heat Transfer Performance of Dual-Diameter Pulsating Heat Pipes
,” Appl. Therm. Eng.
, 236
, p. 121709
.10.1016/j.applthermaleng.2023.12170926.
Aref
, L.
, Fallahzadeh
, R.
, Shabanian
, S. R.
, and Hosseinzadeh
, M.
, 2021
, “A Novel Dual-Diameter Closed-Loop Pulsating Heat Pipe for a Flat Plate Solar Collector
,” Energy
, 230
, p. 120751
.10.1016/j.energy.2021.12075127.
Patel
, E. D.
, and Kumar
, S.
, 2023
, “Thermal Performance of a Single Loop Pulsating Heat Pipe With Asymmetric Adiabatic Channel
,” Appl. Therm. Eng.
, 219
, p. 119541
.10.1016/j.applthermaleng.2022.11954128.
Sedighi
, E.
, Amarloo
, A.
, and Shafii
, B.
, 2018
, “Numerical and Experimental Investigation of Flat-Plate Pulsating Heat Pipes With Extra Branches in the Evaporator Section
,” Int. J. Heat Mass Transfer
, 126
, pp. 431
–441
.10.1016/j.ijheatmasstransfer.2018.05.04729.
Sedighi
, E.
, Amarloo
, A.
, and Shafii
, M. B.
, 2018
, “Experimental Investigation of the Thermal Characteristics of Single-Turn Pulsating Heat Pipes With an Extra Branch
,” Int. J. Therm. Sci.
, 134
, pp. 258
–268
.10.1016/j.ijthermalsci.2018.08.02430.
Satyanarayana
, K.
, Reddy
, N. V. S. M.
, and Venugopal
, S.
, 2023
, “Numerical Study to Recover Low-Grade Waste Heat Using Pulsating Heat Pipes and a Comparative Study on Performance of Conventional Pulsating Heat Pipe and Additional Branch Pulsating Heat Pipe
,” Numer. Heat Transfer, Part A
, 83
(3
), pp. 248
–264
.10.1080/10407782.2022.209136631.
Ji
, Y.
, Chen
, H. H.
, Kim
, Y. J.
, Yu
, Q.
, Ma
, X.
, and Ma
, H. B.
, 2012
, “Hydrophobic Surface Effect on Heat Transfer Performance in an Oscillating Heat Pipe
,” ASME J. Heat Mass Transfer-Trans. ASME
, 134
(7
), p. 074502
.10.1115/1.400611132.
Ma
, X.
, Hao
, T.
, Lan
, Z.
, and Li
, N.
, 2014
, “Effects of Superhydrophobic and Superhydrophilic Surfaces on Heat Transfer and Oscillating Motion of an Oscillating Heat Pipe
,” ASME J. Heat Mass Transfer-Trans. ASME
, 136
(8
), p. 082001
.10.1115/1.402739033.
Hao
, T.
, Ma
, X.
, Lan
, Z.
, Li
, N.
, Zhao
, Y.
, and Ma
, H.
, 2014
, “Effects of Hydrophilic Surface on Heat Transfer Performance and Oscillating Motion for an Oscillating Heat Pipe
,” Int. J. Heat Mass Transfer
, 72
, pp. 50
–65
.10.1016/j.ijheatmasstransfer.2014.01.00734.
Hao
, T.
, Ma
, X.
, and Lan
, Z.
, 2018
, “Effects of Hydrophilic and Hydrophobic Surfaces on Start-Up Performance of an Oscillating Heat Pipe
,” ASME J. Heat Mass Transfer-Trans. ASME
, 140
(1
), p. 012002
.10.1115/1.403734135.
Leu
, T. S.
, and Wu
, C. H.
, 2017
, “Experimental Studies of Surface Modified Oscillating Heat Pipes
,” Heat Mass Transfer/Waerme- Stoffuebertrag.
, 53
(11
), pp. 3329
–3340
.10.1007/s00231-017-2051-236.
Wang
, J.
, Xie
, J.
, and Liu
, X.
, 2020
, “Investigation of Wettability on Performance of Pulsating Heat Pipe
,” Int. J. Heat Mass Transfer
, 150
, p. 119354
.10.1016/j.ijheatmasstransfer.2020.11935437.
Malla
, L. K.
, Dhanalakota
, P.
, Dileep
, H.
, Mahapatra
, P. S.
, and Pattamatta
, A.
, 2024
, “Surface Wettability Modifications and Applications in Wickless Heat Pipes
,” Surf. Interfaces
, 45
, p. 103837
.10.1016/j.surfin.2023.10383738.
Betancur
, L.
, Mangini
, D.
, Mantelli
, M.
, and Marengo
, M.
, 2020
, “Experimental Study of Thermal Performance in a Closed Loop Pulsating Heat Pipe With Alternating Superhydrophobic Channels
,” Therm. Sci. Eng. Prog.
, 17
, p. 100360
.10.1016/j.tsep.2019.10036039.
Kang
, Z.
, Shou
, D.
, and Fan
, J.
, 2021
, “Numerical Study of a Novel Single-Loop Pulsating Heat Pipe With Separating Walls Within the Flow Channel
,” Appl. Therm. Eng.
, 196
, p. 117246
.10.1016/j.applthermaleng.2021.11724640.
Brackbill
, J. U.
, Kothe
, D. B.
, and Zemach
, C.
, 1992
, “A Continuum Method for Modeling Surface Tension
,” J. Comput. Phys.
, 100
(2
), pp. 335
–354
.10.1016/0021-9991(92)90240-Y41.
Xie
, F.
, Li
, X.
, Qian
, P.
, Huang
, Z.
, and Liu
, M.
, 2020
, “Effects of Geometry and Multisource Heat Input on Flow and Heat Transfer in Single Closed-Loop Pulsating Heat Pipe
,” Appl. Therm. Eng.
, 168
, p. 114856
.10.1016/j.applthermaleng.2019.11485642.
Kell
, S.
, 1975
, “Density, Thermal Expansivity, and Compressibility of Liquid Water From 0 °C to 150 °C: Correlations and Tables for Atmospheric Pressure and Saturation Reviewed and Expressed on 1968 Temperature Scale
,” J. Chem. Eng. Data
, 20
(1
), pp. 97
–105
.10.1021/je60064a00543.
Reid
, R. C.
, Prausnitz
, J. M.
, and Poling
, B. E.
, 1987
, The Properties of Gases and Liquids, McGraw-Hill Inc, New York.44.
Grazzini
, G.
, Milazzo
, A.
, and Piazzini
, S.
, 2011
, “Prediction of Condensation in Steam Ejector for a Refrigeration System
,” Int. J. Refrig.
, 34
(7
), pp. 1641
–1648
.10.1016/j.ijrefrig.2010.09.01845.
Janajreh
, I.
, Hasania
, A.
, and Fath
, H.
, 2013
, “Numerical Simulation of Vapor Flow and Pressure Drop Across the Demister of MSF Desalination Plant
,” Energy Convers. Manage.
, 65
, pp. 793
–800
.10.1016/j.enconman.2012.03.01146.
Monteith
, J.
, and Unsworth
, M.
, 2007
, Principles of Environmental Physics
, 3rd ed., Academic Press
, Cambridge, MA.47.
Hendersonsellers
, B.
, 1984
, “A New Formula for Latent-Heat of Vaporization of Water as a Function of Temperature
,” Q. J. R. Meteorolog. Soc.
, 110
(466
), pp. 1186
–1190
.10.1002/qj.4971104662648.
Jung
, J.
, and Jeon
, Y.
, 2023
, “Numerical Study on the Heat Transfer Characteristics of Three-Dimensional Pulsating Heat Pipe
,” J. Mech. Sci. Technol.
, 37
(9
), pp. 4869
–4876
.10.1007/s12206-023-0839-149.
Saha
, N.
, Das
, P. K.
, and Sharma
, P. K.
, 2014
, “Influence of Process Variables on the Hydrodynamics and Performance of a Single Loop Pulsating Heat Pipe
,” Int. J. Heat Mass Transfer
, 74
, pp. 238
–250
.10.1016/j.ijheatmasstransfer.2014.02.06750.
Xu
, J. L.
, and Zhang
, X. M.
, 2005
, “Start-Up and Steady Thermal Oscillation of a Pulsating Heat Pipe
,” Heat Mass Transfer/Waerme- Stoffuebertrag.
, 41
(8
), pp. 685
–694
.10.1007/s00231-004-0535-351.
Groll
, M.
, and Khandekar
, S.
, 2004
, “State of the Art on Pulsating Heat Pipes
,” ASME
Paper No. ICMM2004-2318.10.1115/ICMM2004-231852.
Shafii
, M. B.
, Faghri
, A.
, and Zhang
, Y.
, 2002
, “Analysis of Heat Transfer in Unlooped and Looped Pulsating Heat Pipes
,” Int. J. Numer. Methods Heat Fluid Flow
, 12
(5
), pp. 585
–609
.10.1108/0961553021043430453.
Senjaya
, R.
, and Inoue
, T.
, 2013
, “Oscillating Heat Pipe Simulation Considering Bubble Generation Part I: Presentation of the Model and Effects of a Bubble Generation
,” Int. J. Heat Mass Transfer
, 60
, pp. 816
–824
.10.1016/j.ijheatmasstransfer.2013.01.05954.
Cheng
, P.
, and Ma
, H.
, 2011
, “A Mathematical Model of an Oscillating Heat Pipe
,” Heat Transfer Eng.
, 32
(11–12
), pp. 1037
–1046
.10.1080/01457632.2011.55649555.
Charoensawan
, P.
, and Terdtoon
, P.
, 2008
, “Thermal Performance of Horizontal Closed-Loop Oscillating Heat Pipes
,” Appl. Therm. Eng.
, 28
(5–6
), pp. 460
–466
.10.1016/j.applthermaleng.2007.05.00756.
Shafii
, M. B.
, Faghri
, A.
, and Zhang
, Y.
, 2001
, “Thermal Modeling of Unlooped and Looped Pulsating Heat Pipes
,” ASME J. Heat Mass Transfer-Trans. ASME
, 123
(6
), pp. 1159
–1172
.10.1115/1.140926657.
Mohammadian
, S. K.
, Mohammed
, R. H.
, Nunez
, R.
, Rupam
, T.
, Spitzenberger
, J.
, Hoelle
, J.
, Ibrahim
, O. T.
, Feng
, F. Z.
, Miller
, A.
, Taft
, B.
, Allison
, J.
, Abu-Heiba
, A.
, Mahderekal
, I.
, and Ma
, H.
, 2024
, “Modeling and Experimental Data Analysis of Oscillating Heat Pipes: A Review
,” ASME J. Heat Mass Transfer-Trans. ASME
, 146
(11
), p. 110801
.10.1115/1.4065718
