The Performance and Emission Characteristics of a Compression Ignition Engine Using Ozone Gas and Air Ionizer
Department of Mechanical Engineering, University of Tabuk, Saudi Arabia.
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Air pollution is considered as one of the most major and environmentally risk factor in the incidence and progression of many different diseases. Nowadays all internal combustion engines (ICEs) produce high pollution levels into the environment. The main objectives of the current study are to reduce the rate of fuel consumption, the harmful emissions and increase the engine thermal efficiency. The experimental work was evaluated and performed using diesel engine at faculty of Engineering, University of Tabuk. The tested diesel engine is a five horsepower, four stroke, single cylinder with a cylinder bore and stroke of 80 ×100 mm, air cooled system and has a compression ratio of 16.5:1. The engine performance and emissions were evaluated by using ozone generator and air ionizer. The results showed that, the diesel engine thermal efficiency using natural air is lower than that of using ozone and ionized air at many different values of brake power. The maximum thermal efficiency value recorded with using ionized air was 31.5%. In addition the brake specific energy consumption in case of using natural air, ozone and ionized air was about 18.0, 17.5 and 17.0 MJ/kWh respectively. The hydrocarbon emission slightly decreases as the engine measured load increases and it is clear that using natural air gives the highest values of NOx emission as compared with ozone and ionized air. Finally the diesel fuel sample Cetane number was increased to 55.5 and 58.6 after passing on the ozone and ionizer respectively.