International Conference on Screw Machines 2014/Schraubenmaschinen 2014

Produktbeschreibung

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Content

Plenary Session
The Impact of the VDI Screw Machines Conferences – A Personal Perspective 1
Large industrial screw compressors for refrigeration units – Experiences out of operation and maintenance 15
Screw vacuum pumps – The state of the art 29

Screw Expanders I
Influence of water injection on the operating behaviour of screw expanders Experimental investigation 43
Screw Engine as Expansion Machine Applied in an ORC-Test-Installation – the First Operating Experiences – Lubrication system for a screw machine in reverse rotation 61
An analytic model of the incompressible one-phase clearance flow in liquid injected screw expanders 71

Pulsations, Vibrations and Noise
Analysis of the Noise and Vibration of a Dry Screw Compressor 91
Experimental and theoretical investigation of the excitation of discharge pressure pulsations by a screw compressor  with variable inner volume ratio 107
Consideration of the pulsation as a design criterion for a newly developed oil-injected process gas screw compressor 125

Screw Pumps
Lubricity of Water Based Coolants (WBC) for Screw-Spindle-Pumps – Comparison and Modification of Test Methods for the Evaluation of Lubricity 145
Experimental studies on the volumetric efficiency of triple screw pumps 157

Control/Condition Monitoring
The Control of an Oil Injected Screw Compressor Package Deployed in a Naphtha Cracking Process 173
Condition monitoring on complex machines – Correlated data for a reliable monitoring solution  185

Screw Expanders II
The manuscript „The long-term Experience Report on the Use of Screw Expanders in Commercial small Power
Plants named IC60 based on the Organic Rankine Cycle (ORC)“ by Martin Müller was not available at press date.

Design and examination of a small-scale screw expander for waste heat recovery  197

Screw Profiles
Optimization of rotor profiles for energy efficiency by using chamber-based screw model 211
Contact of rotors of screw machines 225

Simulation I
Advanced analysis of twin screw compressors with variable rotor pitch using one-dimensional thermodynamic simulation 237
A comparative examination of the potential of screw expanders with variable rotor pitch 249

Design/Manufacturing
Modern Machining Processes for the Manufacturing of Screw Machine Components  267
Is Low Friction Efficient? – Assessment of Bearing Concepts – During the Design Phase  279

Simulation II
Structured meshes and reliable CFD simulations: TwinMesh for positive displacement machines 297
Flow visualization at suction of a twin screw compressor 309

Keywords: 092228, 92228, VDI-Berichte 2228, Schraubenmaschinen, Screw Machines, ,