Keywords:
Fluid dynamics.
;
Electronic books.
Type of Medium:
Online Resource
Pages:
1 online resource (188 pages)
Edition:
2nd ed.
ISBN:
9783030106416
Series Statement:
International Cryogenics Monograph Series
URL:
https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=5796407
Language:
English
Note:
Intro -- Preface to the Second Edition -- Preface to the First Edition -- Acknowledgements -- Contents -- List of Figures -- List of Tables -- 1 Introduction -- 1.1 Background, and Redefinition of "Cryogenics" to Include All Temperatures Below 273 K -- 1.2 Early Experiments with Vapour Cooled Baffles and the Empty LOX Pot -- 1.3 Discovery of Unstable Evaporation of Liquid Nitrogen -- 1.4 The Contents of This Monograph -- 1.5 Definitions of Single Component Liquid States -- 1.5.1 The 1983 Definition of a Cryogenic Liquid, with Normal Boiling Point Below 273 K -- 1.5.2 Boiling Temperature -- 1.5.3 Saturation Temperature and Saturation Vapour Pressure -- 1.5.4 Normal Boiling Point NBP or Standard Boiling Point SBP at Standard Atmospheric Pressure of 1 Bar -- 1.5.5 Superheated Liquid -- 1.5.6 Liquid Superheat -- 1.5.7 Subcooled Liquid -- 1.5.8 Wall Superheat -- 1.5.9 Boil-off and Boil-off Rate -- 1.5.10 Heat Flux and Heat Flow -- 1.5.11 Mass Flux and Mass Flow -- 1.5.12 Liquid Terminology -- References -- 2 Evaporation of Cryogenic Liquids -- 2.1 Introduction -- 2.2 Nucleate Boiling from Wall to Bulk Liquid -- 2.2.1 Heterogeneous Nucleate Pool-Boiling -- 2.2.2 High Efficiency Heterogeneous Nucleate Boiling Heat Transfer Using Falling Liquid Films -- 2.2.3 Homogeneous Nucleate Boiling -- 2.2.4 Quasi-homogeneous Nucleate Boiling, QHN Boiling -- 2.3 Convective Heat Transfer Without Evaporation at the Point of Heat Influx -- 2.4 Surface Evaporation -- 2.4.1 Surface Evaporation Mass Flux and Bulk Superheat -- 2.4.2 Impedances to Surface Evaporation: The 3 Regions in the Surface Sublayer -- 2.4.3 General Conclusions from Experimental Studies of Separate Impedance Terms -- 2.4.4 Schlieren Studies of the Surface Interface -- 2.4.5 The Delicate Evaporation Impedances of the Surface Sub-layer.
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2.5 Surface Sub-layer Agitation and Unstable Evaporation Phenomena -- 2.5.1 Agitation of the Surface Sub-layer -- 2.5.2 Continuous Irregular and Intermittent Boil-Off -- 2.5.3 Vapour Explosions -- 2.5.4 Rollover and Nucleate Boiling Hot Spots -- 2.5.5 QHN Boiling and Geysering -- 2.6 Summary of Evaporation Processes -- References -- 3 Heat Flows into a Cryogenic Storage System: Overall Picture -- 3.1 No Boiling -- 3.2 Overall Convective Circulation in the Liquid -- 3.3 Thermal Overfill: General Concept -- 3.4 Distinction Between 'A' and 'B' Heat In-Flows -- 3.5 Radiative Heat In-Flows -- 3.6 Conductive Heat In-Flows -- 3.7 Convective Heat In-Flows -- 3.8 Other Sources of Heat Flow into the Liquid -- 3.9 Summary of Heat In-Flows -- References -- 4 Insulation: The Reduction of 'A' and 'B' Heat In-Flows -- 4.1 Reduction and Control of Heat In-Flows -- 4.2 Radiation -- 4.2.1 Stefan's Law and Low Emissivity Materials -- 4.2.2 Vapour-Cooled Radiation Baffles -- 4.2.3 Plastic Foam Plugs -- 4.2.4 Floating Ball Blankets -- 4.3 Conduction Through the Insulation Space -- 4.3.1 Dewar's Dewar -- 4.3.2 Gas Purged Insulations at 1 bar -- 4.3.3 Evacuated Powder Insulations at 0.1 Torr -- 4.3.4 Multi-layer Reflective Insulations (MLI) at 0.0001 Torr -- 4.4 Conduction Down the Neck and Vapour Cooling -- 4.5 Optimum Design for Minimum Loss of Cryogenic Liquid in a Storage Container -- 4.6 Convective Heat Flows into the Vapour and Liquid -- 4.6.1 Convective Circulations -- 4.6.2 Circulation in the Vapour -- 4.6.3 Residual Heat Flow from Downward Flowing Vapour -- 4.6.4 Convective Circulation in the Liquid -- 4.7 Vapour Convection at the Unwetted Walls -- 4.8 Enhanced Convective Heat Transfer in Vertical Temperature Gradients -- 4.8.1 Use of Enhanced Convective Heat Transfer -- 4.8.2 Enhanced Cooling of Current Leads to Superconducting Magnets.
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4.8.3 Cryocooler/Condensers with Distributed Cooling -- 4.9 Multi-shielding: The Use of Multiple Vapour Cooled Shields in the Insulation -- 4.9.1 Converting 'A' Heat-Inflows to 'B' Heat Inflows -- 4.9.2 Enhanced Heat Transfer at Thermal Contact Rings -- 4.9.3 No LIN Shielding for LHe Systems -- 4.9.4 Assembly of Multi-shields in Insulation Space -- 4.9.5 Vapour Cooled Shields for LIN, LOX, and LNG Vessels -- 4.10 Other Sources of Heat into the Liquid -- 4.10.1 Radiation Funnelling -- 4.10.2 Low Conductivity Neck Tube Materials -- 4.10.3 Thermo-Acoustic Oscillations -- 4.10.4 Mechanical Vibrations -- 4.10.5 Eddy Current Heating -- 4.11 Summary of Insulation Techniques -- References -- 5 Multi-component Liquids -- 5.1 Differences Between Single-Component and Multi-component Liquids -- 5.2 The Difference Between Free-Boiling and Surface Evaporation (T-x) Data -- 5.3 Stratification in Cryogenic Liquid Mixtures -- 5.4 Double Diffusive Convection in Multi-component Cryogenic Liquids -- 5.5 Storage Behavior of Two Layers of Liquid Mixtures -- 5.5.1 The Dynamic Storage Behaviour of 2 Liquid Layers with Different Density Under Constant Isobaric Pressure -- 5.5.2 The Dynamic Storage of 2 Layers with Different Density Under Constant Isochoric Volume with Rising Pressure and Zero Boil-Off -- 5.6 Rollover -- 5.6.1 Basic Description of Rollover -- 5.6.2 Penetrative, Oscillating Convection Across the Interface, and Surface Evaporation Increase, During a Rollover -- 5.6.3 Release of Thermal Overfill During Rollover -- 5.6.4 Experimental Studies: The Two Modes or Types of Rollover -- 5.6.5 Experimental Studies: The Two Convective Mixing Mechanisms of Rollover -- 5.7 Factors Leading to Stratification and Hence Rollover -- 5.7.1 Custody Management Creating Two Layers -- 5.7.2 Auto-stratification in Mixtures -- 5.7.2.1 Mechanisms Due to Density Differences.
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5.7.2.2 High MW Volatile Component in the Mixture -- 5.7.2.3 Non-volatile Impurities in the Surface -- 5.7.2.4 Marangoni Film Flow Effect -- 5.7.3 Auto-stratification in Both Single Component Liquids and Mixtures -- 5.7.3.1 Self-pressurising Storage Tank -- 5.7.3.2 Tall, Thin Storage Tank, Freely Venting -- 5.7.3.3 Passing Atmospheric Weather Fronts -- 5.7.4 Custody Management Filling with Subcooled Liquid Creating Thermal Underfill -- 5.8 Prevention and Avoidance of Rollover -- 5.8.1 Detection of Stratification -- 5.8.2 Adequate Design of Tank Auxiliaries -- 5.8.3 Avoidance and Early Removal of Stratification -- 5.8.4 Possible Use of Internal Convective Devices to Destabilise Stratification -- 5.9 Path Dependent Mixing of Boiling Cryogenic Liquids, with Evaporation -- 5.9.1 Propane-Butane Mixing -- 5.9.2 Experimental Conclusions on the Forced Mixing of Propane and n-Butane -- 5.9.3 Some Consequences of Path-Dependent Mixing -- 5.10 Low Solubility Impurities in the Range 1-10 to 100 ppm -- 5.11 Water/Ice in Jet Fuel -- 5.12 Summary on Mixtures -- References -- 6 The Handling and Transfer of Cryogenic Liquids -- 6.1 General Remarks on Subcooled Liquids and 2-Phase Flow -- 6.2 What is 2-Phase Flow? -- 6.3 Occurrence of 2-Phase Flow -- 6.4 Pumped Liquid Transfer Avoiding 2-Phase Flow -- 6.5 Liquid Transfer Techniques Avoiding 2-Phase Flow -- 6.6 Liquid Transfer with Transient 2-Phase Flow -- 6.7 Cooldown of a Long Pipeline with L/D Greater Than 2000 -- 6.8 Cooldown of a Cryostat with Minimum Loss of Liquid -- 6.9 Cooldown of a Tank -- 6.10 Cooldown of a Large Mass Such as a Superconducting Magnet -- 6.11 Insulation of Transfer Lines -- 6.12 Flashing Losses Due to Transfer at Unnecessarily High Pressures -- 6.13 Zero Delivery -- 6.14 Pressure Surges and the Need for Ten Second Opening and Closing Times for Liquid Valves -- 6.15 Care with Topping-Out.
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References -- 7 Design: Some Comments on the Design of Low-Loss Storage Vessels, Containers and Tanks -- 7.1 General Remarks -- 7.1.1 Three Types of Insulation -- 7.1.2 Heat Break Materials -- 7.1.3 Isothermal Containment -- 7.2 Trouble-Free Joints and Materials -- 7.2.1 Avoiding Joints Between Materials with Dissimilar Thermal Contractions -- 7.2.2 Porosity and High Vacuum -- 7.2.3 Porosity Problems of Austenitic Stainless Steels Transforming to Martensite -- 7.2.4 Adsorbed Hydrogen and High Vacuum -- 7.2.5 Frost-Proof Cryogenic Concrete -- 7.2.6 Hydrogen Embrittlement -- 7.3 Thermal Considerations -- 7.3.1 Choice of Boil-off Rate -- 7.3.2 Some Practical Applications -- 7.3.3 Heat Fluxes Through Insulations in Practical Applications -- 7.4 Thermal Design of 12 Typical Cryogenic Liquid Applications -- 7.4.1 LIN Cooled Sample Holder, 10 mm Diameter, 60 mm Long -- 7.4.2 Laboratory LHe Cryostat with Isothermal Volume, 100 mm Diameter, 500 mm Long -- 7.4.3 500 Litre LHe Laboratory Storage Dewar -- 7.4.4 MRI Cryostat Without, and with, Cryocooler -- 7.4.5 12,600 Litre Static LHe Storage Vessel, 2 m Diameter, 4 m High -- 7.4.6 4000 Litre LHe Space Probe, 2 m Diameter, 3 Year Hold Time -- 7.4.7 LOX Rail Tank or VIT Vessel, 3 m Diameter, 8 m Long, 48 m3 Volume -- 7.4.8 Static LIN/LOX Tank, 13 m Diameter, 13 m High, 1720 m3: Dustbin Configuration -- 7.4.9 Static LIN/LA/LOX Tank, 13 m Diameter, 13 m High, 1142 m3: Cluster Configuration -- 7.4.10 Sea Tanker for 125,000 m3 LNG -- 7.4.11 Static LNG Tank, 75 m Diameter, 50 m High, 220,000 m3 Volume -- 7.4.12 LPG Tank, 100 m Diameter, 50 m High, 390,000 m3 Volume -- 7.5 Summary of Thermal Design of Cryogenic Liquid Vessels -- References, Specific -- References, General (in Reverse Order of Publication) -- 8 Safe Handling and Storage of Cryogenic Liquids -- 8.1 General Remarks -- 8.2 Health Concerns.
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8.2.1 Cold Burns.
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