Dissertation/ Thesis
Performance of a Liquid Fuel-Film Combustor Applied in a Portable TPV System
| العنوان: | Performance of a Liquid Fuel-Film Combustor Applied in a Portable TPV System |
|---|---|
| Alternate Title: | 液態燃料薄膜燃燒室應用於可攜式TPV動力系統之性能研究 |
| المؤلفون: | Hong-Yuan Li, 利鴻源 |
| Thesis Advisors: | Yei-Chin Chao, 趙怡欽 |
| سنة النشر: | 2008 |
| المجموعة: | National Digital Library of Theses and Dissertations in Taiwan |
| الوصف: | 96 The major objective of this thesis is to develop a miniature liquid fuel-film combustor applied in a portable thermophotovoltaic (TPV) power generation system. A novel metal-porous medium is proposed to input in the form of a liquid fuel-film on the porous surface for the liquid-fuel-film combustor. It is an effective method to enhance the contact surface, to increase conduction heat transfer for liquid fuel vaporization and to stabilize the flame. Based on this concept, a meso-scale liquid fuel-film combustor with central porous fuel inlets applied in TPV power system is developed and tested. An infrared thermal tube (ZrO2) is used as the emitter of the TPV system. A new reverse tube design is proposed to modify fluid field, and further to force flames attaching on the wall to enhance thermal emission from the emitter. Besides, the reverse tube redirects hot product gas to reheat the wall in order to further enhancing and unifying the radiation of the emitter wall. Consequently, the radiation efficiency of the emitter is significantly increased and the flame can be completely confined inside the chamber. In order to optimize operation condition of this combustor, surface temperature of the emitter is measured by an infrared thermometer, flame structure is measured by chemiluminescence, and combustion efficiency of this combustor is estimated by gas emissions measured by a gas analyzer. Finally, the combustor is integrated with an high-efficiency GaSb PV cells array into a complete TPV system. According to measured I-V curve, maximum operational electric output of the overall TPV system is examined and evaluated. Compared to the theoretical efficiency, the deviation of the overall efficiencies reveals the heat loss and shortcomings in design. The resultant I-V performance indicates that the distance between emitter and reverse tube, fuel energy input, fuel types, and equivalence ratio are major elements related to the electrical power output of the TPV system. |
| Original Identifier: | 096NCKU5295060 |
| نوع الوثيقة: | 學位論文 ; thesis |
| وصف الملف: | 62 |
| الاتاحة: | http://ndltd.ncl.edu.tw/handle/60826854919287670708 |
| رقم الانضمام: | edsndl.TW.096NCKU5295060 |
| قاعدة البيانات: | Networked Digital Library of Theses & Dissertations |
| الوصف غير متاح. |