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viii Contents 6.7.2.1 Materials 154 6.7.2.2 Wall Thickness and Envelope Shapes 155 6.7.2.3 Safety Valves 155 6.7.3 Performances 155 6.8 Future Trends 156 6.8.1 Two-Stage Compressor 156 6.8.2 Expander and Expander–Compressor 159 6.9 Some Key Technical Problems of CO2 Compressor 160 6.9.1 Mechanical Strength 160 6.9.2 Lubricant Problems 160 6.9.2.1 Miscibility of Lubricant and CO2 160 6.9.2.2 Lubricant Stability 161 6.9.2.3 Choice of Lubricant 161 6.9.3 Oil Dilution 162 6.9.4 Large Pressure Differences 162 6.9.4.1 Wrist Pin 162 6.9.4.2 Connecting Rod 164 6.9.4.3 Crankshaft 164 6.9.4.4 Bearings 164 6.9.4.5 Valve Plate 165 6.10 Conclusion and Perspectives 165 Nomenclature 166 References 166 7 CO2 Subcooling 171 Rodrigo Llopis, Daniel Sánchez, Laura Nebot-Andrés, Jesús Catalán-Gil and Ramón Cabello 7.1 Introduction 171 7.2 CO2 Thermodynamic Properties and Approach 175 7.2.1 Thermodynamic Properties of CO2 175 7.2.2 CO2 Subcooling Approach 180 7.2.2.1 Subcritical CO2 Subcooling 7.2.2.2 Transcritical CO2 Subcooling 7.2.3 Benefits of Subcooling 184 7.2.3.1 Second Law Approach 185 7.2.3.2 Capacity 186 7.2.3.3 COP 187 7.2.3.4 Energy Input 188 7.2.4 Subcooling Optimization 188 7.3 Internal Heat Exchanger 189 7.3.1 Introduction 189 7.3.2 Description and Operation 7.3.3 Revision of Research of IHX 192 7.3.3.1 Predicting Methods 192 7.3.3.2 Theoretical and Experimental Analysis 193 182 183 189PDF Image | What is a heat pump
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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