碳氫燃料電漿重組反應器設計與機車引擎應用研究

Abstract

本研究設計一組脈衝式燃料電漿重組器，來探討各項參數對產出氫氣特性的影響並配合對富氫氣體導入四行程機車引擎之運轉特性進行探討。 系統主要包含燃料電漿重組器、燃料與空氣供應系統、數據擷取系統以及量測分析系統等。燃料電漿重組器由訊號產生器、反應室、產出氣體收集室所構成；燃料及空氣供應系統內包含鋼瓶氣體、氣體流量計及噴嘴等；量測分析系統包括氣相色層分析儀、示波器、電流勾錶等。實驗參數包括O2/C比(0.2~0.6)、電弧頻率(20KHz)、燃料進料流率(10~50mL/min)、電極間隙(2mm~5mm)等。 由實驗結果得知，採用反應室通道內徑、電極間隙、燃油進料率等系統適當參數，對於氫氣產出濃度、氫氣產出流率等方面，皆有較佳之產出表現。此外，氣體於反應通道內空間速度越小，氫氣產出濃度越高。本研究系統在參數適當化設定下，最高氫氣產出濃度可達36 Vol%、氫氣產出流率高可達148.57 mL/min 另一部分是將探討混合富氫氣體導入機車引擎之影響，利用氣體鋼瓶來混合富氫氣體，以控制不同氫氣質量百分比(2-12%)、富氫氣體供應率(L/min)等參數。並且維持機車原引擎供油系統，並對進氣系統稍作修改，以便將富氫氣體導入機車引擎燃燒，並配合各種不同引擎轉速(3000-6000rpm)、引擎油門開度(1/6-6/6) 進行探討。

The main focus of this study is to design, researching applications, and methods of plasma reforming of hydrocarbon fuel on four stroke motorcycle engines.

The overall apparatus includes plasma recombination device, fuel and air supply system, and data analyzer instruments. The plasma recombination device consists of signal generator, reaction chamber, and gas collection chamber. The fuel and air supply system include gas contain in steel chamber, gas flow meter, and nozzle. The data analyzer instruments contain gas chromatographer, oscilloscope, and current meter, etc. The experimentation settings are O2/C ratio (0.2~0.6), the electro arc frequency (200 Hz) , the fuel flowing rate (10~50mL/min) , and the electro arc spacing (5mm~10mm).

The experimental data illustrates that using appropriate setting of reaction chamber diameter, elector arc spacing, and methane flow rate, able to generate better result of hydrogen concentration and flow rate. The produced hydrogen concentration in the reaction chamber increase as the flow rate decrease. Under the appropriate system setting, the hydrogen concentration is able to reach 38.42 Vol% and hydrogen flow rate of 143.58 mL/min

Another part of the study is discussion of effects on mixing high concentrate hydrogen into four stroke motorcycle engine, utilized the steel reaction chamber for high concentrate hydrogen combination to control hydrogen gas ratio (2~12%), and flow rate of high concentration hydrogen, etc. Experiment maintains the original fuel system of motorcycle engine. Modifies the air intake system for hydrogen combustion, with engine speed of 3000~6000rpm, and the engine throttle is opening 1/6-6/6degree.