記述言語：日本語   出版者・発行元：Scientific Reports  

Malaysia is one of the top exporters of palm oil, and although currently facing fierce resistance towards palm oil imports in some parts of the globe, one of the ways to utilize this commodity is by increasing palm biodiesel content in local commercial diesel. However, due to the oxygen-rich nature of biodiesel, its utilization suffers from increased nitrogen oxides (NOx) emission compared to conventional diesel. To mitigate this issue and improve diesel engine performance and emissions using biodiesel–diesel blends, this study attempted to investigate implementation of a real-time non-surfactant emulsion fuel supply system (RTES) which produces water-in-diesel emulsion as fuel without surfactants. NOx reducing capability of water-in-diesel produced by RTES has been well documented. Therefore, in this study, 30% biodiesel–diesel (B30) was used as the base fuel while B30-derived emulsions consisting of 10 wt%, 15 wt% and 20 wt% water content were supplied into a 100 kVA, 5.9-L common rail turbocharged diesel engine electric generator. Fuel consumption and exhaust emissions were measured and compared with commercially available Malaysian low grade diesel fuel (D2M). Evidence suggested that emulsified B30 biodiesel–diesel produced by RTES was able to increase brake thermal efficiency (BTE) up to a maximum of 36% and reduce brake specific fuel consumption (BSFC) up to 8.70%. Furthermore, B30 biodiesel–diesel emulsions produced significantly less NOx, carbon monoxide and smoke at high engine load. In conclusion, B30 biodiesel–diesel emulsions can be readily utilized in current diesel engines without compromising on performance and emissions.

DOI： 10.1038/s41598-023-37662-4

Scopus

PubMed

記述言語：日本語   出版者・発行元：International Journal of Automotive Technology  

Water-in-diesel emulsion fuel has become a popular alternative fuel for diesel engines. The main limitation is related to its stability, whereby it relies heavily on surfactants to remain homogeneous, therefore causing production costs to rise. This paper highlights the application of real-time non-surfactant emulsion fuel supply system (RTES), a water/diesel emulsifying device without surfactants, to produce water-in-diesel emulsion fuel in a common rail direct injection diesel engine powered vehicle. In this study, RTES was installed near to the diesel fuel pump to ensure water-in-diesel emulsions were continuously fed to the engine. The test vehicle was set up on a roller dynamometer and operated following a modified West Virginia University (WVU) 5-Peak cycle. Fuel consumption and exhaust emissions were measured to determine the optimum water percentage of emulsion fuel and suitable timing for emulsion fuel to be introduced into the fuelling system based on the vehicle speed. The results revealed that the optimum water percentage of the emulsion fuel for the test vehicle is 10 wt%, as it was capable to reduce fuel consumption as well as nitrogen oxides and smoke emissions of a common rail direct injection diesel engine powered vehicle.

DOI： 10.1007/s12239-023-0109-3

Scopus

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Frontiers  

DOI： 10.3389/fmech.2020.00067

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SAE  

その他リンク： https://www.sae.org/publications/technical-papers/content/2019-32-0581/

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：日本混相流学会  

管径530μmの直円管（マイクロチャンネル）に窒素ガスと液体からなる気液二相流のスラグ速度と長さに及ぼす粘度の影響を調べた．液体は水の動粘度よりも粘度が1倍から35倍まで高いグリセリン水溶液を用いた．その結果，スラグ速度は粘度が大きくなるほど速くなり，スラグ長さは粘度が高くなるほど短い傾向が見られた．

DOI： 10.3811/jjmf.2018.006

記述言語：日本語 著書種別：学術書

開催年月日： 2022年3月

記述言語：日本語   会議種別：口頭発表（一般）  

開催地：福岡県福岡市西区   国名：日本国  

受賞区分：学会誌・学術雑誌による顕彰  受賞国：日本国

受賞区分：学会誌・学術雑誌による顕彰  受賞国：日本国

受賞区分：国際学会・会議・シンポジウム等の賞  受賞国：タイ王国