Status : Verified
| Personal Name | Coronado, Leif Oliver B. |
|---|---|
| Resource Title | Modelling of open ejector geothermal partial evaporating cycle |
| Date Issued | 3 July 2020 |
| Abstract | The development of sustainable energy resources like geothermal is well suited and increasingly recognized. Geothermal energy resource is less harmful and cleaner than conventional coal or oil, and gas power plants. However, as compared with conventional power generation, geothermal energy sources have relatively lower energy efficiency. A novel combination of Partial Evaporating Cycle (PEC) and Ejector Rankine Cycle (ERC) for geothermal application is conducted in this study. To enhance the performance of the geothermal cycle, this paper considered incorporating the ejector and the two-phase expander as flashing equipment. The ejector is located after the turbine to elongate the expansion of the working fluid at a lower temperature, which afterward, undergoes the energy recovery process in the ejector. Furthermore, to assess the effects of altering key parameters on the efficiency of the proposed system, thermodynamic analysis, exergy analysis, and parametric analysis were investigated together with the effect of partially evaporating the wellhead properties. Moreover, comparisons of Conventional Non-Ejector Geothermal Cycle (CNEGC), Geothermal Partial Evaporating Cycle (PEC) with Ejector Trilateral Flash Cycle (ETFC), and the proposed geothermal system is also conducted to show how the ejector can help improve the performance of the system and the effects of interchanging the positions of primary and secondary fluid for the ejector. The result of the analysis revealed that introducing an ejector to a geothermal system increased the energy production by 27.1% maximum, as compared with the non-ejector system using the same parameters. The maximum net energy output and efficiency were essentially improved. The resulted power generation of the proposed is 690 kW maximum. The resulted maximum thermal efficiency and exergy of the proposed system are 28.1% while 69.4%, respectively. For parametric analysis, a better cycle performance is seen at lower separator |
| Degree Course | Master of Science in Mechanical Engineering |
| Language | English |
| Keyword | ejector; Geothermal; Partial Evaporating Cycle; Geothermal optimization; One dimensional modelling of ejector |
| Material Type | Thesis/Dissertation |
Preliminary Pages
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Category : I - Has patentable or registrable invention of creation.
Access Permission : Limited Access