Effects of low-level hydroxy as a gaseous additive on performance and emission characteristics of a dual fuel diesel engine fueled by diesel/biodiesel blends

Bahman Najafi,Farid Haghighatshoar,Sina Ardabili,Shahab S Band,Kwok Wing Chau,Amir Mosavi

doi:10.1080/19942060.2021.1871960

Abstract

In the present study, water electrolysis was employed for Hydroxy gas (HHO) production as a gaseous additive. The engine test was performed using the Diesel, B5, and B20 as pilot fuels. HHO was imported into the engine's combustion chamber at three volumetric flow rates of 3, 4, and 5 cc/s through the inlet manifold as the low-level HHO rate.The engine test setup was a single-cylinder dual-fueled diesel engine at a constant speed (1500 rpm) and full load condition. According to the results, HHO by 3 and 4 cc/s did not have a significant effect on BP, BTE, and BSFC. Using HHO gas by 5 cc/s significantly increased BP by about 2.5, 3.1, and 0.5% compared with Diesel, B5 and B20, respectively, and decreased BSFC by about 11, 7.8, and 13.5% compared with Diesel, B5, and B20, respectively.HHO gas by 5 cc/s significantly decreased CO2 by about 7, 6.3, and 10.6% compared with Diesel, B5, and B20, respectively, and decreased CO emissions by about 6, 14.3, and 21.2% compared with Diesel, B5 and B20, respectively. However, the use of HHO gas and biodiesel increased NOx emission by about 16, 13.7, and 10.5% compared with Diesel, B5, and B20, respectively.

Highlights

Fossil fuels and their impact on pollutions have led researchers to find clean fuel resources
The highest braking power (BP) increase is related to DHHO5 and B5HHO5 fuels, which have increased by 2.61 and 3.16% compared to D and B5 fuels, respectively
Using HHO gas with 3 cc/s flow rate does not significantly affect BP, but using it in the amount of 4 and 5 cc/s increases the BP compared to diesel and B5 fuels

Summary

Introduction

Fossil fuels and their impact on pollutions have led researchers to find clean fuel resources. Hydrogen is the only renewable fuel that does not have carbon content (Knop et al, 2008). As a clean and environmentally friendly fuel (Dincer, 2007; Yilmaz et al, 2010), is an accessible and endless fuel source (Arat, 2019). Hydrogen can be generated by electrochemical, biological, and thermochemical methods. The most desirable method for producing hydrogen is water electrolysis (Baltacioglu et al, 2019) with renewable energy sources such as solar and wind resources (Trujillo-Olivares et al., 2019). The cost of producing hydrogen must be reduced to the use of water electrolysis. The durability, reliability, and safety of the system must be increased (Vickers, 2017; Yadav Milind et al, 2011)

Methods

Results

Conclusion