Heat transfer
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1. Field Demonstrated Extended Graetzian Viscous Dissipative Thermo-photonic Energy Conversion with a Blended MgO/PVDF/PMMA coated Glass-PDMS Micro-pillar Heat Exchanger,International Journal of Heat and Mass Transfer, 215 124520.
Y.M. Wong, C.Y. Tso, S.C. Fu, C.Y. Chao, 2023.
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https://doi.org/10.1016/j.ijheatmasstransfer.2023.124520
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Abstract: Chilled water harvesting is a fundamental application of passive radiative cooling and promotes energy conservation for space cooling in buildings potentially, which relies on well-designed radiative cooling materials and heat transfer interface. This paper reports a scenario leading to viscous dissipative thermo-photonic energy conversion, which takes place in low Peclet number regime of an order of magnitude of 100, where heat transfer is non-Graetzian. Compared to benchmarked glass-polydimethylsiloxane radiative cooler and barium sulphate coating, a newly developed trinary micro-porous 32/4/4 magnesium-oxide/poly(vinylidene-fluoride)/poly (methyl-methacrylate) radiative cooling blend, featuring high atmospheric window emissivity and solar reflectivity, both exceeding 97%, demonstrated a superior cooling performance with additional temperature reduction of 1.6 â—¦C at daytime. Meanwhile, it chilled water at a flow rate of 6.3 μL/s by 1.3 â—¦C upon coating on a glass-polydimethylsiloxane micro-pillar heat exchanger. Quantitative evaluation on the chilled water capacity was carried out at nighttime when the system ran pseudo-steadily. Cooling power measurement on a radiative cooler of same materials recorded a cooling power of 134 W/m2 which is close to the ideal limit. And measured water temperature reduction and cooling efficiency were 2.5 â—¦C and 6.3% respectively. They were significantly lower than the saturation limit. Degraded thermal and energy conversion performances, attributive to extended Graetzian viscous dissipation, were discussed theoretically.
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2. Asymmetric Transmittivity of Optical Devices and Comparisons with Electronic and Thermal Diodes, iScience, 26 107032.
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A.Q. Pan, K.X. Lin, S. Chen, C.Y. Tso*
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https://doi.org/10.1016/j.isci.2023.107032
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Abstract: This study theoretically proved that although reciprocal optical devices can show asymmetric transmittivity (AT) under controlled incident modes (i.e., conditional AT), they cannot guarantee AT with arbitrary incident light modes, whereas only nonreciprocal optical devices can possibly guarantee AT. Besides, the thermodynamics of both reciprocal and nonreciprocal optical devices were discussed to show that the second law of thermodynamics is valid anyway. Furthermore, the diode-like behaviors of optical and electronic devices were compared. Electrons are identical to electronic devices, so electronic devices could have asymmetric conductance regardless of electrons. In contrast, electromagnetic waves are different from optical devices as transmittivity of different modes can be different, so reciprocal optical devices showing conditional AT cannot guarantee AT when incident modes are arbitrary. The mathematical proof and characteristic comparisons between electronic and optical diodes,which are firstly presented here, should help clarifying the necessary nonreciprocity required for being optical diodes.
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3. Polypyrrole-Reduced Graphene Oxide Coated Delignified Wood for Highly Efficient Solar Interfacial Steam Generation, Applied Thermal Engineering, 219 119686.
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M.Y. Wong, Y. Zhu, T.C. Ho, A.Q. Pan, C.Y. Tso*, 2023.
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https://doi.org/10.1016/j.applthermaleng.2022.119686
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Abstract: A solar interfacial steam generator is a device that localizes the solar energy at the water–air interface for water evaporation. The solar interfacial steam generator can be applied in various evaporation-based thermal systems to enhance system efficiency by reducing heat dissipation. In this study, a bio-inspired polypyrrole-reduced graphene oxide coated wood was fabricated and investigated for evaporation and solar-to-vapor conversion efficiency improvement with different polypyrrole-reduced graphene oxide ratios. Thanks to the synergistic effect of highly solar-absorbed polypyrrole and water-attracted reduced graphene oxide, and the efficient heat transfer two-dimensional pathway, the polypyrrole-reduced graphene oxide coated wood showed an outstanding water evaporation performance. The highest water evaporation rate obtained by the polypyrrole-reduced graphene oxide coated wood with the reduced graphene oxide content of 60 % was 1.49 kg⋅mô€€€ 2⋅hr-1, showing a nearly 10 % and 19 % improvement compared to polypyrrole and reduced graphene oxide coated woods, respectively. The corresponding solar-to-vapor conversion efficiency (93.1 %) was also beyond most of the wood-based interfacial steam generators in the literature. The transient heat transfer and evaporation performances of the polypyrrole-reduced graphene oxide coated wood were also firstly investigated based on the developed transient models. It is expected that the remarkable results of this study can help to promote and facilitate the study and application of interfacial steam generators in various thermal systems.
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4. Facile Synthesis of Micro-eggette Patterned Nanofiltration Membrane with Effective Antifouling and Rejection Performance, Desalination 555 116524.
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W. Shang, W. Liu, W. Wang, N.K. Khanzada, J. Guo, M. Li, X. Li, J.Y. Lao, S.Y. Jeong, C.Y. Tso F. Sun, A.K. An, 2023.
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https://doi.org/10.1016/j.desal.2023.116524
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Abstract: Widespread application of the nanofiltration (NF) technique in wastewater reuse is still hindered by the NF membrane’s fouling propensity and rejection efficiency. This study presents the fabrication of a micro-patterned NF (M-NF) membrane structured with micro-eggette morphology for simultaneously enhancing anti-fouling and rejection performance. The M-NF membrane was synthesized by combining optimized micro-molding phase inversion and classic interfacial polymerization reaction. Microscopic characterization and chemical analysis confirmed the formation of uniform 4 μm height patterns and the crosslinked polyamide layer. Separation and fouling tests demonstrated that the M-NF membrane possesses better anti-fouling and rejection performance. Ex- situ and in-situ fouling tests illustrated that, compared to the control membrane, the M-NF membrane could maintain high water permeation during fouling filtration while showing reduced flux decline, greater fouling resistance, and less fouling deposition owing to its enhanced trough and crest by micro-eggette morphology. The M-NF membrane also achieved 5–38 % higher mono/di-valent salts rejection and 6–8 % higher PFOS rejection than that of the NF270 membrane. Further computational fluid dynamics simulations showed that the surface pattern-disturbed hydrodynamic flow promoted the hydrodynamic forces exerted on the pollutant molecules. This work demonstrates the strong potential of membrane surface patterning for improving novel NF membranes’antifouling and rejection abilities.
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5. A Novel Composite Adsorbent Coated Superhydrophilic-Nanostructured Heterogeneous Surface for Condensation Heat Transfer Enhancement, International Journal of Thermal Sciences 184 107978.
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S. Chen, A. Pan, Y.H. Zhu, T.C. Ho, H.H. Lee, Y. Zeng, C.L. Wu, H.H. Qiu, C.Y. Tso*, 2023.
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6. Copper-alumina Hybrid Nanofluid Droplet Phase Change Dynamics over Heated Plain Copper and Porous Residue Surfaces, International Journal of Thermal Sciences 182 107795.
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F.R. Siddiqui, C.Y. Tso, S.C. Fu, H.H. Qiu, C.Y. Chao, 2022.
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7. Hybrid Nanofluid Spray Cooling Performance and its Residue Surface Effects: Toward Thermal Management of High Heat Flux Devices, Applied Thermal Engineering 211 118454.
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F.R. Siddiqui, C.Y. Tso, H.H. Qiu, C.Y. Chao, S.C. Fu, 2022.
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8. Infection Control Measures for Public Transportation derived from the Flow Dynamics of Obstructed Cough Jet, Journal of Aerosol Science, 163 105995. (Featured as Cover Image).
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C.T. Wang, J.C. Xu, K.C. Chan, H.H. Lee, C.Y. Tso, S.K. Lin, C.Y. Chao, S.C. Fu, 2022.
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9. Jumping Droplets on Nanostructured Biphilic Surfaces: Effects of Surface Structure, Surface Orientations, and Air Pressure, Cell Reports Physical Science, 3 100849.
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Y. Zhu, T.C. Ho, H.H. Lee, M.K.H. Leung and C.Y. Tso*, 2022.
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10. Thermal Rectification Enhancement of Coalescence – Jumping Phase Transition Thermal Diodes using Cu-Al2O3 Hybrid Nanofluids, Advanced Engineering Materials, 2100958 (Featured as Inside Front Cover).
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M.Y. Wong, Y.H. Zhu, Y. Zeng, H.C. Ho, Y. Yang, H.H. Qiu and C.Y. Tso*, 2021.
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11. Droplet Evaporation and Boiling for Different Mixing Ratios of the Silver-graphene Hybrid Nanofluid over heated Surfaces, International Journal of Heat and Mass Transfer. 180 121786.
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F.R. Siddiqui, C.Y. Tso, S.C. Fu, H.H. Qiu, C.Y. Chao, 2021.
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12. Solar-Assisted Icephobicity Down to -60 °C with Superhydrophobic Selective Surfaces, Cell Reports Physical Science, 2(3) 100384.
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W. Ma, Y. Li, C.Y. Chao, C.Y. Tso, B.L. Huang, W. Li and S.H. Yao, 2021.
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13. Coalescence-induced Jumping Droplets on Nanostructured Biphilic Surfaces with Electrification Effects, ACS Applied Materials & Interfaces, 13(9) 11470-11479.
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Y. Zhu, C.Y. Tso*, T.C. Ho, M.K.H. Leung and S. Yao, 2021.
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14. Droplet Evaporation of Cu-Al2O3 Hybrid Nanofluid Over Residue and Copper Surfaces: Towards Developing a New Analytical Model, ASME Journal of Heat Transfer, 143 021604-1.
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F.R. Siddiqui, C.Y. Tso, S.C. Fu, H.H. Qiu and C.Y. Chao, 2021.
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15. A Review of State of the Art Thermal Diodes and their Potential Applications, International Journal of Heat and Mass Transfer, 164 120607.
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M.Y. Wong, C.Y. Tso*, T.C. Ho and H.H. Lee, 2021.
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16. Study of the Salinity Effects on the Cooling and Desalination Performance of an Adsorption Cooling cum Desalination System with a Novel Composite Adsorbent, Applied Thermal Engineering, 181 115879.
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S. Bai, T.C. Ho, J. Ha, A.K An, and C.Y. Tso*, 2020.
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17. Heat Transfer Enhancement on Tube Surfaces with Biphilic Nanomorphology, Applied Thermal Engineering, 180 115778.
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Y. Zhu, C.Y. Tso*, T.C. Ho, M.K.H. Leung, S. Yao and H.H. Qiu, 2020.
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18. Chillers of Air-conditioning Systems: An Overview. The Hong Kong Institution of Engineers (HKIE) Transactions, 27(3) 113-127. (The HKIE Best Transaction Paper Prize)
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M.K.H. Leung, C.Y. Tso, W. Wu and Z. Zheng, 2020.
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19. Evaporation and Wetting Behavior of Silver-graphene Hybrid Nanofluid Droplet on its Porous Residue Surface for Various Mixing Ratios. International Journal of Heat and Mass Transfer, 153 119618.
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F.R. Siddiqui, C.Y. Tso, S.C. Fu, H.H. Qiu and C.Y. Chao, 2020.
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20. A Theoretical Model for the Effective Thermal Conductivity of Graphene Coated Metal Foams. Applied Thermal Engineering, 161 114112.
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K.C. Chan, C.Y. Tso, A. Hussain and C.Y. Chao, 2019.
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21. Energy Consumption, Indoor Thermal Comfort and Air Quality in a Commercial Office with Retrofitted Heat, Ventilation and Air Conditioning (HVAC) System. Energy and Buildings, 201 202-215.
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W.W. Che, C.Y. Tso, L. Sun, D. Ip, H. Lee, C.Y. Chao and A.K.H. Lau, 2019.
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22. Experimental and Theoretical Study of a Water-Vapor Chamber Thermal Diode. International Journal of Heat and Mass Transfer, 138 173-183.
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M.Y. Wong, B. Traipattanakul, C.Y. Tso, C.Y. Chao and H.H. Qiu, 2019.
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23. A Phase-change Thermal Diode using Electrostatic-induced Coalescing-jumping Droplets. International Journal of Heat and Mass Transfer, 135 294-304.
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B. Traipattanakul, C.Y. Tso and C.Y. Chao, 2019.
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24. On Trade-off for Dispersion Stability and Thermal Transport of Cu-Al2O3 Hybrid Nanofluid for Various Mixing Ratios. International Journal of Heat and Mass Transfer, 132 1200-1216.
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F.R. Siddiqui, C.Y. Tso, K.C. Chan, S.C. Fu and C.Y. Chao, 2019.
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25. Dataset on Critical Parameters of Dispersion Stability of Cu/Al2O3 Nanofluid and Hybrid Nanofluid for Various Ultra-sonication Times. Data in brief, 22 863-865.
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F.R. Siddiqui, C.Y. Tso,K.C. Chan, S.C. Fu, C.Y. Chao, 2019.
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26. Electrostatic-induced Coalescing-Jumping Droplets on Nanostructured Superhydrophobic Surfaces. International Journal of Heat and Mass Transfer, 128 550-561.
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B. Traipattanakul, C.Y. Tso, and C.Y. Chao, 2019.
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27. Performance Investigation of Nanostructured Composite Surfaces for use in Adsorption Cooling Systems with a Mass Recovery Cycle. Science and Technology for the Built Environment (formerly HVAC&R Research Journal), 24 1084-1103.
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L.Q. Zhu, C.Y. Tso, K.C. Chan, C.L. Wu, C.Y. Chao, J. Chen, W. He, and S.W. Luo, 2018.
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28. Techno-economic Analysis on Frosting/defrosting Operations for an Air Source Heat Pump Unit with an Optimized Multi-Circuit Outdoor Coil. Energy and Buildings, 166 165-177.
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M.J. Song, C.Y. Tso*, C.Y. Chao, and C.L. Wu, 2018.
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29. Experimental Investigation on Composite Adsorbent-Water Pair for a Solar-Powered Adsorption Cooling System. Applied Thermal Engineering, 131 649-659.
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L.Q. Zhu,C.Y. Tso, K.C. Chan, C.L. Wu, C.Y. Chao, J. Chen, W. He, and S.W. Luo, 2018.
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30. Enhancing the Performance of a Zeolite 13X/CaCl2 – Water Adsorption Cooling System by improving Adsorber Design and Operation Sequence. Energy and Buildings, 158 1368-1378.
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K.C. Chan, C.Y. Tso, C.L. Wu and C.Y. Chao, 2018.
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31. Thermal Management of Lithium Ion Batteries using Graphene coated Nickel Foam saturated with Phase Change Materials. International Journal of Thermal Sciences, 124 23-35.
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A. Hussain, I.H. Abidi, C.Y. Tso, K.C. Chan, Z.T. Luo and C.Y. Chao, 2018.
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32. Study of Jumping Water Droplets on Superhydrophobic Surfaces with Electric Fields. International Journal of Heat and Mass Transfer, 115 672-681.
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B. Traipattanakul, C.Y. Tso, and C.Y. Chao, 2017.
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33. Development of a Phase Change Material (PCM)-based Thermal Switch. The Hong Kong Institution of Engineers (HKIE) Transactions, Special Issue on Energy Engineering with Applications in Smart Green Buildings, 24(2) 107-112. (The HKIE Best Transaction Paper Prize)
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X.J. Wang, C.Y. Tso*, B. Traipattanakul, C.Y. Chao, 2017.
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34. A Field Investigation of a Solar-Powered Adsorption Cooling System under Guangzhou’s Climate with Various Numbers of Heat Exchangers in the Adsorbers. Science and Technology for the Built Environment (formerly HVAC&R Research Journal), 23(8) 1282-1292.
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L.Q. Zhu, C.Y. Tso*, W. He, P. Li, C.L. Wu, C.Y. Chao, 2017.
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35. Study of Residue Patterns of Aqueous Nanofluid Droplets with Different Particle Sizes and Concentrations on Different Substrates. International Journal of Heat and Mass Transfer, 105 230-236.
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H.H. Lee, S.C. Fu, C.Y. Tso and C.Y. Chao, 2017.
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36.Evaporation of Al2O3-Water Nanofluids in an Externally Micro-grooved Evaporator. Science and Technology for the Built Environment (formerly HVAC&R Research Journal), 23 345-354.
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S.C. Fu, C.Y. Tso, Y.S. Fong and C.Y. Chao, 2017.
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37. Experimental Investigation of a Passive Thermal Management System for High-powered Lithium Ion Batteries using Nickel Foam-Paraffin Composite. Energy, 115 209-218.
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A. Hussain, C.Y. Tso and C.Y. Chao, 2016.
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38. Solid-State Thermal Diode with Shape Memory Alloys. International Journal of Heat and Mass Transfer, 93 605-611.
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C.Y. Tso and C.Y. Chao, 2016.
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39. Experimental Performance Analysis on an Adsorption Cooling System using Zeolite13X/CaCl2 Adsorbent with Various Operation Sequences. International Journal of Heat and Mass Transfer, 85 343-355.
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C.Y. Tso, K.C. Chan, C.Y. Chao and C.L. Wu, 2015.
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40. Study of Enthalpy of Evaporation, Saturated Vapor Pressure and Evaporation Rate of Aqueous Nanofluids. International Journal of Heat and Mass Transfer, 84 931-941.
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C.Y. Tso and C.Y. Chao, 2015.
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41. Experiment verified Simulation Study of the Operating Sequences on the Performance of Adsorption Cooling System. Building Simulation, Tsinghua University Press. 8 255 – 269.
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K.C. Chan, C.Y. Tso, C.Y. Chao and C.L. Wu, 2015.
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42. A Semi-analytical Model for the Thermal Conductivity of Nanofluids and Determination of the Nanolayer Thickness. International Journal of Heat and Mass Transfer, 70 202-214.
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C.Y. Tso, S.C. Fu and C.Y. Chao, 2014.
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43. Modeling a Solar-powered Double Bed Novel Composite Adsorbent (Silica Activated Carbon/CaCl2) - Water Adsorption Chiller. Building Simulation, Tsinghua University Press. 7 185-196.
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C.Y. Tso, S.C. Fu and C.Y. Chao, 2014.
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44. Performance Analysis of a Waste Heat driven Activated Carbon based Composite Adsorbent – Water Adsorption Chiller using Simulation Model. International Journal of Heat and Mass Transfer, 55 7596-7610.
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C.Y. Tso, C.Y. Chao and S.C. Fu, 2012.
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45. Activated Carbon, Silica-gel and Calcium Chloride Composite Adsorbents for Energy Efficient Solar Adsorption Cooling and Dehumidification Systems. International Journal of Refrigeration, 35 1626-1638.
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C.Y. Tso and C.Y. Chao, 2012.
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