Effect Of Water Mist In Spark Ignition Engine Toward Exhaust Gas Emission

Ramli, Ahmad Syukran (2017) Effect Of Water Mist In Spark Ignition Engine Toward Exhaust Gas Emission. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This study investigates the effect of water addition in a spark ignition engine by analyzing the exhaust gas emission. Method of the study research is using experimental method. The concept of vapourize the water by using ultrasonic humidifier. The engine was using a Suzuki Belang R150 as the experiment engine. The gas analyzer brand EMS model 5002 for the exhaust gas analyzer. The experiment were conducted in a workshop at Faculty Engineering Technology. The ultrasonic humidifier were attach at the center of the motorcycle near the carburetor. Tools that used were humidity sensor and temperature sensor. The sensor were attached at the middle between the carburetor and the ultrasonic humidifier. The condition of the first experiment without water mist were, the air intake temperature is 35°C and the humidity is 61%. The second experiment which that with the mist maker, the air intake temperature is 27°C and the humidity is 99%. Both experiment have the ambient temperature of 35°C. The result were taken at 1,000 rpm to 10,000 rpm. With water mist addition the result of O2% emission have been reduce from 1.4% to 8.6% at various engine speed. The CO% emission with addition of water mist the reading from 1,000rpm to 5,000 rpm was a bit lower then without water mist, but from 6,000rpm to 10,000rpm was gradually increase. With water addition the result of CO2% emission have been reduce from 0.3% to 2.3% at various engine speed. With water mist addition the result of HC ppm emission have been increase from 19 ppm to 583 ppm at various engine speed. . With water mist addition the result of NOX ppm emission have been reduce from 3 ppm to 21 ppm at various engine speed. With water mist addition the result of AFR emission have been increase from 5 to 20.73 at various engine speed. At the end of this research, the conclusion are, water mist addition can reduce O2, CO2, NOX emission but its also increase HC emission and leaner the AFR or air fuel ratio. Water mist addition does not have significant change toward CO.

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