Page 191 - Kỷ yếu hội thảo quốc tế: Ứng dụng công nghệ mới trong công trình xanh - lần thứ 9 (ATiGB 2024)

182 TRƯỜNG ĐẠI HỌC SƯ PHẠM KỸ THUẬT - ĐẠI HỌC ĐÀ NẴNG

DESIGNING A DIRECT SYNGAS INJECTOR

FOLLOWING THE REVERSE-FLOW PATTERN

IN SI ENGINE

Ho Tran Ngoc Anh, Vo The Hac, Phan Nhu Thuat, Dao Huu Viet Thang,
*
Duong Anh Khoa, Ta Cong Vuong, Lam Dao Nhon, Pham Viet Anh Dien, Vo Du Dinh, Bui Van Hung
*bvhung@ute.udn.vn
Abstract: The application of syngas in internal combustion efficiency. To insure the feasibility and
combustion engines has gradually become popular in effectiveness of the design, simulations, and tests will be
current research. However, the composition of syngas is conducted to insure stability and safety when applied in
always changing, so designing injectors to adjust the practice. This research not only provides advanced technical
appropriate fuel amount for the engine is extremely solutions but also makes a significant contribution to
necessary. The reverse-opening gas injector allows a large environmental protection and engine efficiency
flow of syngas to be directly supplied to the combustion improvement.
chamber. This solves the drawback of poor fuel for syngas, Keywords: Syngas; reverse-opening nozzle; syngas
and this design prevents the compressed air pressure from engine.
being pushed back into the injector, ensuring the engine's
1. INTRODUCTION solution to resolve the weaknesses of mixing on the
intake pipe [4].
In the context of increasing climate change and
the warning of the depletion of fossil resources, Within the scope of this project, we focused on
research and development of renewable energy researching and manufacturing a direct gas injection
sources are more urgent than ever. The expression is nozzle for the Honda GX160 engine, an attempt to
that a lot of countries around the world are leverage the efficiency of biomass fuels, namely
transitioning from fossil fuels to renewable sources of syngas gas, to enhance the efficiencies and
energy, such as solar, wind, hydropower, and performance in the combustion process when using
biomass. syngas instead of fossil fuels as before [5–6]. This not
only helps reduce our dependence on fossil energy but
In this field, the application and development of
advanced methods to harness biomass, a potential also makes use of the biomass available in rural
renewable energy source, is an important part of the Vietnam. By developing new technology, we are
renewable energy revolution. Among the applications opening the door to a future of cleaner and more
of biomass, the production of syngas from biomass sustainable energy use. Clean energy not only helps
sources is a potential solution to replace fossil fuels in protect the environment and reduce pollution but also
combustion processes. provides a plentiful energy supply, contributing to the
country's economic efficiency.
However, a major challenge to the use of syngas
gas is its poor A/F ratio [1]. The A/F ratio of syngas 2. THEORETICAL BASIS
in a mixture of completely combustion gases in theory The syngas gas fuel injection nozzle is designed
ranges from 1 to 1.2, much lower than that of methane and applied to the Honda GX160 engine and consists
gases [1]. Because the A/F ratio is low, the spraying of several main components, such as the air connector
time will be extended, and the amount of gas fuel hose, blocking ring covers, shell cap, coil housing,
supplied at the intake stroke will not be completely solenoid coil, center bolt, magnetic suction,
sucked into the cylinder at the end of the intake. This compression spring, valve body, nozzle pushbar, and
makes the engine's equivalent coefficient unattainable spray valve hood. These are also some of the basic
as a fully theoretical combustion value, especially
when the engine runs at high speeds [2]. In addition, a parts of traditional gas pipes. However, the new point
quantity of fuel will accumulate on the intake pipe in in the injection nozzle design here is that the closure
the previous cycle, disrupt the equivalent coefficient method allows the hose to have superior and more
of the mixture in subsequent cycles, and cause the efficient advantages in the process of injecting air
reverse explosion phenomenon [3]. To solve this directly into the combustion chamber.
problem, research and application of a reverse-open 2.1. Caculation equation
air injection nozzle directly into the combustion Air flow equation [7]:
chamber is a potential approach. Direct spraying of
syngas into the combustion chamber is an effective

ISBN: 978-604-80-9779-0