- Title
- Design and modelling of the limaçon positive displacement gas expander
- Creator
- Phung, Truong
- Date
- 2017
- Type
- Text; Thesis; PhD
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/165481
- Identifier
- vital:13319
- Identifier
- https://library.federation.edu.au/record=b2746788
- Abstract
- The limaçon positive displacement technology has been featured in a number of patents over the last 100 years. The technology offers a two-lobe rotor that slides and rotates in a rounded cavity so as to create a pair of variable-volume chambers suited for fluid processing. As such, it can be employed to manufacture gas expanders to extract work from low-grade heat or other heat resources. Positive displacement gas expanders are applied to small-scale power generation plants which can be used for a number of applications such as to improve the energy efficiency of existing thermal processes. This thesis features work undertaken to develop models to inform and enhance the design process such that an optimised limaçon machine is produced. The models developed in the thesis efficiently predict and characterise the performance of the limaçon gas expander irrespective of the working fluid used or the phase transformation that takes place during the working of the expander. The models developed are multiphysics in nature as they incorporate the vibration analysis of the apex seals with the thermodynamical differential description of the working medium together with the dynamical characterisation of an electro-mechanical control valve fitted to regulate the amount of fluid allowed into the working chamber. Chapter 1 starts with a problem statement that addresses the questions which the author aims to answer upon the completion of this project. The chapter offers a detailed background on the limaçon technology and where it falls in relation to other fluid processing machines. Chapter 1 is also a literature review which spans such aspects as:; Doctor of Philosophy
- Publisher
- Federation University Australia
- Rights
- Copyright Truong Phung
- Rights
- Open Access
- Rights
- This metadata is freely available under a CCO license
- Subject
- Expanders; Limaçon; Rotating machinery
- Full Text
- Thesis Supervisor
- Sultan, Ibrahim
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| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | SOURCE1 | Australian Digital Thesis | 3 MB | Adobe Acrobat PDF | View Details Download |