A Comparison in Combustion Characteristics in a CVCC with Biodiesel Blends

Nguyen Nghia,Nguyen Truong,Nguyen Khoa,Nguyen Tuan,Le Tuan

doi:10.3390/en15031017

Abstract

This paper presents the comparison of combustion characteristics in a constant volume combustion chamber (CVCC) with alternative fuel biodiesel blends. To achieve this goal, a CVCC experimental was established, and the biodiesel was made from fish oil and was used as test fuel. The combustion process of diesel fuel (B0) and bio-diesel 10% (B10) will be investigated based on doing experiments with two conditions: air-fuel mixed before and after ignition timing. The influence of the oxygen concentration on the burning process is also being investigated. The results of the research show that the heat release rate of B0 is faster and higher than that of B10 in the case of air-fuel mixed before ignition timing. In the case of after ignition timing, these values are almost similar to B0 and B10.

Highlights

Current internal combustion engines are one of the main driving forces in many economic sectors, especially manufacturing and transportation
On the other hand, can be made from a variety of common raw materials, including agricultural waste, animal fat, waste oil, and algae [20,21], and by developing biodiesel plans, developing countries can participate in sustainable agriculture [22,23].When researching the fuel used for internal combustion engines, research on combustion is essential for engine optimization, including mixture formation and combustion studies, fuel injection time, ignition timing, fuel combustion time, flame spread rate, rate of pressure increase, and the equivalent ratio between fuel and air [24,25,26]
Engine testing showed that experiments with Al2O3-based nanofluid (NF) and producer gas (PG)-based operation resulted in 11.5% amplified brake thermal efficiency, a 23.2% reduction in smoke, and an 18.2–21.4% reduction in hydrocarbon (HC) and carbon monoxide (CO) emissions, while a significantly higher nitric oxide level (NOx) of 32.6% was achieved compared to the same fuel combination excluding NP at 80% load

Summary

Introduction

Current internal combustion engines are one of the main driving forces in many economic sectors, especially manufacturing and transportation. Ji Zhang et al studied the burning properties of vegetable oils with different blend ratios (20%, 50%, and 100%) compared with diesel fuel in the constant volume combustion chamber [33]. Through the analysis of the above studies, the authors found that using a constant volume combustion chamber has many advantages for studying the combustion of the engine, such as the advantage of the ability to change combustion parameters, such as the air-fuel ratio, the ratio of excess air, the pressure inside the combustion chamber, and the temperature. This combustion chamber is very flexible when it comes to researching. It is easy to change the boundary conditions (temperature, pressure, and fire time) of the combustion process and can be researched for many different fuels

Test Fuels

Test Equipment

Findings

Experimental Setup