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vi Contents 3 Fluid Dynamics and Heat Transfer of Supercritical Carbon Dioxide Cooling 43 Brian M. Fronk 3.1 Supercritical Properties 43 3.2 Supercritical Heat Transfer Fluid Mechanics 44 3.2.1 Buoyancy, Flow Acceleration and Oscillations in Near-Critical Flows 45 3.2.2 Outline of Remainder of Chapter 47 3.3 Supercritical Gas Cooling Experiments 48 3.3.1 Single-Tube Studies 48 3.3.2 Mini/Microchannel Studies 50 3.3.3 Summary of Experimentally Observed Effects 50 3.4 Supercritical CO2 Heat Transfer Correlations 53 3.4.1 Constant Property Turbulent Correlations 54 3.4.2 Krasnoschekov et al. (1970) Correlation 54 3.4.3 Ghajar and Asadi (1986) Correlation 55 3.4.4 Pitla et al. (2002) Correlation 56 3.4.5 Son and Park (2006) Correlation 56 3.4.6 Oh and Son (2010) Correlation 56 3.4.7 Microchannel Correlations 57 3.4.8 Comparison of Correlations 58 3.5 Supercritical CO2 Pressure Drop 58 3.6 Supercritical CO2 Heat Transfer and Pressure Drop with Lubricants 60 3.6.1 CO2 /Lubricant Pressure Drop Correlations 61 3.6.2 CO2 /Lubricant Heat Transfer Correlations 62 3.7 Summary and Need for Additional Research 62 3.7 Nomenclature 63 3.7 Greek Symbols 63 3.7 Subscripts 64 References 64 4 Boiling Flow and Heat Transfer of CO2 in an Evaporator 73 Haruhiko Yamasaki 4.1 Introduction 73 4.2 Boiling Heat Transfer of Liquid CO2 in an Evaporator 76 4.3 Sublimation Heat Transfer of Dry Ice-Gas CO2 in an Evaporator/Sublimator 85 Acknowledgments 92 Nomenclature 92 Greek Symbols 93 Subscripts 93 References 93 5 Theoretical Analysis of the CO2 Expansion Process 99 Ammar M. Bahman, Riley B. Barta, Eckhard A. Groll and Davide Ziviani 5.1 Introduction 99PDF Image | What is a heat pump
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