13th International Conference on Compressors and Their Systems : Conference Proceedings

• Autore: Read Matthew
• Pubblicazione: Cham : , : Springer International Publishing AG, , 2024; ©2024
• Edizione: 1st ed.
• Descrizione fisica: 1 online resource (877 pages)
• Disciplina: 621.51
• Altri autori: RaneSham Ivkovic-KihicIvona KovacevicAhmed
• Nota di contenuto: Intro -- Contents -- Screw Compressors -- Comparison of PV-Diagrams Between CFD and Experimental Results for Twin-Screw Compressors -- 1 Introduction -- 2 CFD Simulation -- 3 Experimental Validation -- 4 Results and Discussion -- 4.1 Simulation and Experimental Results at 30Hz -- 4.2 Examination of Pressure Near the Economizer Port -- 4.3 Simulation and Experimental Results at 60Hz and 95Hz -- 5 Conclusion -- References -- Model Validation of Twin Screw Compressor with Optimized Injection Port for Unit Efficiency -- 1 Introduction -- 1.1 Motivation -- 1.2 Vapor Compression Cycle with Economizer Port -- 2 Economizer Port Optimization -- 3 Modified Screw Compressor Testing -- 3.1 Experimental Setup -- 4 Results and Discussion -- 4.1 Compressor Results -- 4.2 Unit Results -- 5 Conclusions -- References -- Simplified Engineering Calculation Methods of the Temperature Distribution Along the Screw Compressor Rotors -- 1 Introduction -- 2 Calculation of Temperature Fields of Rotors and Their Thermal Deformations -- 2.1 Impact of the Compressor Design Parameters, As Well As the Operating Mode on the Thermal State of the Rotors -- 2.2 Calculation Results -- 3 Conclusions -- References -- CFD Analysis of Leakage Flow in Radial Tip Gap of Roots Blower -- 1 Introduction -- 2 Computational Fluid Dynamics -- 2.1 Conservation Laws of Fluids -- 3 Computational Analysis of Roots Blower -- 3.1 Computational Domain of Simplified Roots Blower -- 3.2 Simulation Set-Up -- 4 Results and Discussion -- 4.1 Validation -- 4.2 Tip Design Concept Study -- 4.3 Rotor Tip Design Study -- 5 Conclusion and Future Scope -- References -- Thermodynamic Properties of Oil Droplets Impacting on Chamber Wall in Oil-Injected Screw Compressors -- 1 Introduction -- 2 Computational Model -- 2.1 Model Parameters and Boundary Settings -- 2.2 Governing Equations. ; 2.3 Grid Independence Verification -- 3 Oil Film Heat Transfer with Droplet Impacting on the Wall -- 3.1 The Influence of Oil Film Thickness -- 3.2 The Influence of Oil Drop Temperature -- 3.3 The Influence of Oil Droplet Velocity -- 3.4 The Influence of Oil Droplet Diameter -- 4 Conclusions -- References -- Experimental Investigation of the Distribution of Two-Phase Flow in Oil-Injected Twin-Screw Compressors -- 1 Introduction -- 2 Experimental Setup -- 2.1 Operation Point and Compressor -- 2.2 Reference Measurements -- 3 Modeling Hydraulic Losses -- 3.1 Acceleration Power Loss -- 3.2 Fluid Friction Power Loss -- 3.3 Momentum Power Loss -- 3.4 Squeezed Oil -- 4 Conclusion -- References -- Mesh Generation for Twin-Screw Compressors by Spline-Based Parameterization Using Preconditioned Anderson Acceleration -- 1 Introduction -- 2 Workflow of Our Analysis-Suitable Parameterization Method for Rotary Twin-Screw Compressors -- 3 Elliptic Grid Generation Using Preconditioned Anderson Acceleration -- 3.1 Elliptic Grid Generation (EGG) and Its Discretization -- 3.2 Discretization in Sobolev Space -- 3.3 Anderson Acceleration with Dynamic Preconditioning Strategy -- 4 Analysis-Suitable Parameterizations for Planar Slices -- 5 Conclusion and Future Work -- References -- Orthogonal Mesh Generation of Screw Compressors for Capturing Tip Leakage Flows -- 1 Introduction -- 1.1 GridPro's Topology Paradigm -- 1.2 Dynamic Boundary Conforming (DBC) Technology -- 2 Conformal Interface Approach -- 3 Existing Approach-Transverse Plane Grid Generation -- 3.1 Rounding the Housing Cusp -- 4 3D Smoothing of the Transverse Grid -- 4.1 3D Smoothing Results -- 5 Rotor Helix Normal Grid Generation Method -- 5.1 Methodology -- 5.2 Suitability of the Mesh for Different Solvers -- References. ; Two Way Coupling of CFD Conjugate Heat Transfer Simulation with Solid Thermal Expansion in a Twin Screw Compressor -- 1 Introduction -- 1.1 Compressor Conjugate Heat Transfer and Thermal Expansion -- 1.2 Proposed Simulation Approach with Required Capabilities/Tools -- 1.3 Governing Equations and Physics Models -- 2 Twin Screw Compressor Test Case -- 2.1 Fluid Model -- 2.2 Solid Heat Transfer Model -- 2.3 Solid Thermal Expansion Model -- 3 Results and Discussion -- 4 Conclusion and Future Works -- References -- Investigating Alternative Rotor Materials to Increase Displacement and Efficiency of Screw Compressor While Considering Cost and Manufacturability -- 1 Introduction -- 1.1 Exploring Lightweight Materials and Innovative Manufacturing Techniques for Screw Compressor Rotors -- 1.2 Metal Additive Manufacturing and Alternative Materials for Different Screw Compressor Applications -- 2 Numerical Simulation -- 2.1 Modelling Methodologies -- 2.2 Rotor Grid Generation left parenthesis upper S upper C upper O upper R upper G Superscript upper T upper M Baseline right parenthesis(SCORGTM) -- 2.3 Structural Analysis Boundary Conditions -- 2.4 SCORPATH Modelling -- 3 Result and Discussion -- 4 Conclusion -- 5 Further Study -- References -- Investigation and Optimization of a Twin-Screw Compressor with Internal Cooling Channels -- 1 Introduction -- 2 Twin Screw Compressor Model -- 2.1 Geometry Model -- 2.2 Heat Transfer Model -- 3 Simulation Setup -- 3.1 Geometry Setup and Operating Conditions -- 3.2 Simulation Methods and Meshing -- 4 Results and Discussion -- 4.1 Model Verification -- 4.2 Rotor Discharge Temperature Slices -- 4.3 Rotor Surface Temperature Plots -- 4.4 Performance Parameters -- 4.5 Solid and Hollow Rotor Comparison -- 5 Conclusion -- References -- Design of Hobbing Cutter for Variable-Pitch Screw Rotor -- 1 Introduction. ; 2 Constant-Pitch Hobbing Algorithm -- 2.1 Coordinate Systems and Coordinate Transformation -- 2.2 Meshing Equation -- 2.3 Three-Degree-of-Freedom Hobbing Method -- 3 Variable-Pitch Hobbing Algorithm -- 4 Example of Variable-Pitch Hob Design -- 5 Conclusions -- References -- Influence of Bearing and Seal Design on Performance of an Oil-Injected Screw Compressor for Refrigeration Applications -- 1 Introduction -- 2 Definition of Test Cases -- 3 Bearings and Seals Selection and Design -- 3.1 Bearing Design Constraints -- 3.2 Bearings and Seals Loss Modelling -- 3.3 Bearing Selection Methodology -- 4 Performance Analysis of Bearing-Seal Configurations -- 4.1 Cylindrical Roller Bearing -- 4.2 Hydrodynamic Bearing -- 4.3 Dual Oil Seal -- 4.4 Bearing Configuration Comparison -- 5 Conclusions -- References -- Theoretical Analysis of Hydrodynamic Water-Lubricated Plain Bearings for High-Speed Applications -- 1 Introduction -- 2 Layout and Operational Bearing Forces -- 3 Materials for Water-Lubricated Journal Bearings -- 4 Flow Characteristics and Gap Tolerance -- 5 Minimum Lubricant Film Thickness -- 5.1 Hydrodynamic Lubrication -- 5.2 Allowable Minimum Lubricant Film Thickness hlim -- 5.3 Ratio of Length and Diameter and Relative Eccentricity -- 6 Conclusion -- References -- A Novel Screw Compressor with a Shunt Enhanced Decompression and Pulsation Trap (SEDAPT) -- 1 Introduction -- 2 Process Analysis of Two Parallel Compression Schemes -- 2.1 Arrangement of Screw Compression in Parallel: UC Only Scheme-SECAPT -- 2.2 Arrangement of Screw Compression in Parallel: OC Only Scheme-SEDAPT [2, 3] -- 2.3 A One-Stage SEDAPT Example and Design Rules -- 3 Design Optimization of SEDAPT Scheme by Computational Model Analysis -- 3.1 Computational Model Simulation-Code Description -- 3.2 Computational Model Simulation Example-Optimization Procedure. ; 3.3 Comparison of the Pros and Cons of Several Compression Schemes with SEDAPT -- 4 Conclusions and Recommendations for Future Work -- 4.1 Conclusions -- 4.2 Recommendations for Future Work -- References -- Scroll Compressors -- Preliminary Design and Performance Evaluation of Micro Scroll Compressor Used in Refrigeration Systems -- 1 Introduction -- 2 Preliminary Design of Micro Scroll Compressor -- 2.1 Basic Parameters -- 2.2 Structure Design -- 3 Performance Analysis Model -- 3.1 Physical Model -- 3.2 Meshing -- 3.3 Calculation Method and Boundary Conditions -- 4 Results and Discussion -- 4.1 Analysis of Internal Flow of Compressor -- 4.2 Performance Analysis Under Variable Working Conditions -- 5 Conclusions -- References -- A Study to Improve Efficiency of a Variable Speed Scroll Compressor -- 1 Introduction -- 2 Optimization -- 2.1 Economizer -- 2.2 Speed Optimization -- 2.3 Discharge Port Delay -- 2.4 Involute Start Angle -- 3 Conclusion -- References -- Performance Anlaysis of Water-Cooled VRF System in Cooling Mode by Changing Scroll Compressor Geometry -- 1 First Section -- 2 Measurement Device -- 3 Mathematical Model -- 3.1 Water-Cooled VRF System -- 3.2 Scroll Compressor -- 3.3 Other Components -- 4 Results and Discussion -- 4.1 Validation of the Simulation -- 4.2 Analysis of VRF System Performance by Changing Geometry of Scroll Compressor -- 5 Conclusions -- References -- Experimental Testing of a Scroll Compressor with Two-Phase Refrigerant Flows -- 1 Introduction -- 2 Test Bench Description -- 3 Results Post-processing -- 3.1 Assumptions -- 3.2 Inlet Vapor Quality Calculation -- 3.3 Volumetric Efficiency -- 3.4 Isentropic Efficiency -- 4 Results and Discussions -- 4.1 Volumetric Efficiency -- 4.2 Isentropic Efficiency -- 5 Conclusion -- References. ; Experimental Comparison into the Effect of Oversized Heat Exchangers on Seasonal Performance Improvements of a Two-Stage and a Variable Speed Compressor in an R410A Chiller.
• Titolo autorizzato: 13th International Conference on Compressors and Their Systems
• ISBN: 3-031-42663-0
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Lingua di pubblicazione: Inglese
• Record Nr.: 9910799487603321
• Lo trovi qui: Univ. Federico II
• Serie: Springer Proceedings in Energy Series