| Edition |
[Second edition]. |
| Description |
1 online resource |
|
text txt rdacontent |
|
computer c rdamedia |
|
online resource cr rdacarrier |
| Series |
Woodhead Publishing in mechanical engineering
|
| Bibliography |
Includes bibliographical references and index. |
| Summary |
Current concerns with climate change have resulted in greatly increased interest in power recovery from low grade heat sources. This includes both hot fluid streams which can be expanded directly to produce mechanical power and those which act as a source of heat to closed cycle power generation systems. Power recovery from low grate heat by means of screw expanders with a generalised overview of how best to recover power from such sources, based on thermodynamic considerations, which differs to the approach used in classical thermodynamics textbooks and which includes an introductory description of the types of working fluid that are used in systems used to recover power from such sources and the criteria that must be taken into account in their selection. This is followed by a description of the mathematical modelling of twin screw machine geometry. The modelling of the thermodynamics and fluid flow through such machines is then given, together with how this is used to predict their performance. Finally a detailed description is given of systems currently used or projected both for direct expansion of the source fluid and by recovery of heat from it, which includes those which are particularly suited to the use of screw expanders in place of turbines. |
| Note |
Print version record. |
| Contents |
Front Cover; Power recovery from low-grade heat by means of screw expanders; Copyright; Contents; List of figures; Preface; Acknowledgements; Notation; Subscripts; About the authors; Introduction: power from lowgrade heat; 1:Expanders for power recovery; 1.1 Turbines; 1.2 Positive displacement machines; 2:Power plant thermodynamics; 2.1 Maximum work; 2.2 Some observations; 2.3 Practical considerations; 2.4 Working fluids other than water; 2.5 Fluid properties; 3:Geometry and manufacture of screw expander rotors; 3.1 Introduction; 3.2 Review of contemporary rotor profiles. |
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3.3 Screw expander rotor geometry3.4 Features of 'N' rotor profiles; 3.5 Geometry of rotor manufacturing tools; 3.6 Design of screw expander housings and choice of bearings; 4:Modelling and performance calculation of screw expanders; 4.1 The screw expander process and mathematical modelling; 4.2 Equations governing the screw machine processes; 4.3 Flow through the admission and discharge ports; 4.4 Flow through the leakage paths; 4.5 Injection of oil and other liquids; 4.6 Solution procedure for the screw machine thermodynamics; 4.7 Calculation of thermodynamic properties of working fluids. |
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4.8 Calculation of machine performance parameters4.9 Results of modelling and experimental investigations; 4.10 Calculation of pressure forces acting on screw machine rotors; 4.11 Radial, axial rotor loads, torque and bearing reactions; 4.12 Rotor deflections; 4.13 Recent advances in screw machine development; 5:Applications for screw expanders; 5.1 Screw expander lubrication; 5.2 Systems; 5.3 Cycles; 5.4 Cycle optimisation; Appendix 1: properties of commonly used working fluids; Appendix 2: estimation of working fluid properties; A2.1 The Redlich-Kwong-Soave equation of state. |
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A2.2 Thermodynamic property estimationBibliography; Index. |
| Subject |
Power (Mechanics)
|
|
Energy harvesting.
|
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Énergie mécanique.
|
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Récupération d'énergie.
|
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TECHNOLOGY & ENGINEERING -- Mechanical.
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Energy harvesting
|
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Power (Mechanics)
|
| Other Form: |
Print version: Smith, Ian K. Power recovery from low grade heat by means of screw expanders 1782421890 (OCoLC)879527295 |
| ISBN |
9781782421900 (electronic bk.) |
|
1782421904 (electronic bk.) |
|
9781782421894 |
|
1782421890 (cloth) |
| Standard No. |
AU@ 000055979281 |
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CHBIS 010295310 |
|
CHNEW 001012226 |
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CHVBK 327764058 |
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DEBBG BV042309782 |
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DEBSZ 414275896 |
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DEBSZ 431690219 |
|
GBVCP 787703419 |
|
NLGGC 375941312 |
|
