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[9001926.] رقم البحث : 9001926 - |
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Kinetic Modeling and Experimental Study of a Premixed charge Compression Ignition Engine Fueled with Premixed Ethanol–Diesel Fuel Blends / دراسة نمذجه حركية وتجريبية لمحرك إشعال بالانضغاط يشحن بمخلوط مسبق من وقود الإيثانول والديزل |
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قطاع الدراسات الزراعية / |
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Egyptian sٍugar journal / / vol.10 - 5/7/2018 |
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اسماء فتحى محمود - مؤلف رئيسي |
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A. M. El Zahaby |
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sugar technology |
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The combustion process in the Premixed charge Compression Ignition (PCCI) engine is basically restricted by the in-cylinder charged mixture components. However, the homogeneity of the charged mixture is determining the quality and process of the chemical reaction during the auto-ignition process. In the present work, the engine experimental setup is equipped with a new fuel system in order to produce a perfect commixture of diesel/ethanol aerosol at different blends ratio. The obtained results are used to validate the simulations data of the PCCI ignition. Prediction is performed using a detailed kinetic reaction mechanism. The simulation study is achieved to predict the auto-ignition timing and the combustion characteristics of the PCCI engine fueled with different blends of ethanol and diesel at different volume percentage. The premixed ratio of the ethanol in the ethanol/diesel fuel blends is used to control the auto-ignition timing and the combustion characteristics at different engine air/fuel ratios. The main pathway of this work is to study the influence of engine operating parameters which including the premixed ratio, fuel-air equivalence ratio on the combustion performance of PCCI engine. These effects are studied and traced through the simulation result data of the in-cylinder pressure, temperature, and heat release at different premixed ratios of ethanol-diesel fuels blends of 0, 10, 20, 30,40 and 50% (by volume). The obtained results show that by increasing the premixed ratio of ethanol in diesel fuel commixture in the range up to 50% will decrease the peak cylinder pressure and temperature and decrease the combustion duration time. The Brake Specific Energy Consumption (BSEC) decreases as the ethanol content increases and the brake thermal efficiency Increases significantly with the addition of ethanol to the fuel mixture. The combustion temperature inside the engine cylinder decreases as the ethanol content of the fuel mixture increases, The higher the ethanol content of the fuel mixture, the higher the nitrogen oxides (NOx). Carbon monoxide (CO) and hydrocarbon (HC) emissions increase slightly in low loads and decrease in high loads as a result of cooling effect and the higher latent heat of vaporization of ethanol. |
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