| Summary: | 碩士 === 國立勤益科技大學 === 機械工程系 === 102 === In just two decades, the developing countries on energy demand and consumption is growing, rapidly, and almost beyond the developed countries. However, the traditional fossil fuels are limited, such that creating new and sustainable energy is exectly important and necessary. There are many kinds of renewable energies already used, such as solar energy, wind power energy and bioenergy, etc., but still not enough for future demand. Except creating the new energy, developing the energy saving technology is also important. In this research, combustion effencies of an engine for different types of gasohol which is kikd of gasoline and bioethanol mixture are examined by analyzing the emissions of CO, HC and CO2.
According to the results of a series experiments shown that, with the engine speed maintaining at idle state, the CO emissions decrease with increasing of bioethanol concentration, the discharge of HC also with the same trend, especially when the proportion of bioethanol up to 20%, the decrease amount are obviously. In addition, if the speed of engine is set to 2000rpm, the same results are obtained, that is said, using bioethanol as fuel will be good for energy saving and emissions reduction.
In order to promote the combustion efficiency of engine further, some kind of energy-saving chips are installed ioto the fuel tank, so that the fuel can pre react with those chips in advance. By series experiments with the same processure before, the emissions of CO and HC are measure to compare with which were not chips installed. From the results obtained, the emissions of CO and HC are all more obvious decreasing, which means that, the chips really can make better burning of gasohol to save more energy as well as to reduce more waste emissions.
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