天然ガスとGTL軽油を混焼させるDDFエンジンの燃焼・排出ガス特性 - GTL軽油による効果と天然ガス当量比の影響

DOI Web Site Web Site 参考文献5件

書誌事項

タイトル別名
  • Combustion and Exhaust Emission Characteristics of Diesel Dual Fuel Engine Using GTL Diesel Fuel with Natural Gas - Effect by GTL Diesel Fuel and Influence of Natural Gas Equivalence Ratio
  • テンネン ガス ト GTL ケイユ オ コンショウサセル DDF エンジン ノ ネンショウ ・ ハイシュツ ガス トクセイ : GTL ケイユ ニ ヨル コウカ ト テンネン ガス トウリョウヒ ノ エイキョウ

この論文をさがす

抄録

<p>A feasibility study was conducted on examining combustion and emission characteristics of a diesel dual fuel (DDF) engine that uses gas to liquids (GTL) diesel fuel and natural gas. Natural gas can reduce carbon dioxide (CO2) emissions and shale gas is expected to be supplied more stably and inexpensively. However, natural gas engines generally employ the Otto cycle, which is ignited by a spark plug, due to their low self-ignitability. Therefore, their thermal efficiency is lower than that of diesel engines, and this makes their brake specific fuel consumption (BSFC) higher. For this reason, Diesel cycle-based DDF engines were developed in an attempt to improve BSFC levels. DDF engines ignite natural gas by self-ignition of injected gas oil. On the other hand, GTL diesel fuel is expected as a possible alternative fuel made from natural gas, thanks to its high ignitability. Therefore, it can be considered that replacing gas oil with GTL diesel fuel will lead to an improvement in combustion characteristics of DDF engines that are ignited by liquid fuel. Consequently, in this study, a test was conducted to apply GTL diesel fuel to a DDF engine. A conventional 1007-cc diesel engine was modified into a test engine by installing a gas mixer on its intake pipe in order to take in natural gas from the manifold, making it possible for the engine to suck premixed natural gas and air. This premixed gas was ignited by injected GTL after compression. The test was aimed at making clear combustion and emission characteristics of the DDF engine. In the combustion process, nitrogen oxides (NOx) emissions increased at high load. However, smoke emissions were significantly lower than the case of diesel combustion. Moreover, it was found that BSFC of the DDF engine was lower at middle and high loads compared to diesel combustion. Although total hydro carbon (THC) emissions from the DDF engine were high at low load, the use of GTL diesel fuel made it possible to reduce such emissions.</p>

収録刊行物

参考文献 (5)*注記

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ