Abstract
In this paper, a dual-fuel compression ignition engine test bench is presented. In hydrogen-diesel fuel co-combustion conditions, the engine parameters are determined – performance: effective torque, effective power and mean effective pressure; fuel economy: fuel consumption and specific fuel consumption; toxicity: carbon monoxide, carbon dioxide, nitrogen oxides, hydrocarbons, and smoke emissions (opacity). The impact of hydrogen-diesel fuel mass ratio on the performance, toxicity and economy of the engine is studied by obtaining a series of hydrogen-diesel fuel ratio variation characteristics at constant engine speed and load. Improvement of the economical parameters of the engine and reduction of carbon dioxide concentration in exhaust gases is detected under operation with hydrogen gas fuel. Significant reduction of the exhaust gases opacity is observed. It is not clear what the impact of the quantity of hydrogen, injected in the engine, on the concentration of nitrogen oxides in the exhaust gases is.
Highlights
Today, internal combustion engines are thermal machines which have reached a very high level of perfection – in their design and technology, as in the process of their working cycle
It is widely known that the main reason for particle emissions, mostly free carbon in soot form, of a diesel engine is the non-homogenous nature of the air-fuel mixture
The analysis of the experimental results obtained from the examination of a DV 550 diesel engine running on dual fuel mode showed the following: 1. A decrease in fuel consumption and brake specific fuel consumption is observed in every engine mode with the engine operating in a gas-diesel cycle as compared to the operation on standard diesel fuel
Summary
Internal combustion engines are thermal machines which have reached a very high level of perfection – in their design and technology, as in the process of their working cycle.
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