Evaluation of the effects of biodiesel produced from spent coffee grounds on the performance and emissions of a Diesel engine
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Abstract
This study evaluates the performance and emissions of the D229-4 engine fueled with Biodiesel derived from waste coffee grounds. Fuel blends were formulated by mixing Diesel and Biodiesel at 0%, 20%, 40%, and 100%. Simulation results at 1,200 – 2,400 rpm show that increasing the Biodiesel ratio slightly reduces engine efficiency, with power and torque decreasing by 2 – 5% for B20 and B40, and 15 – 20% for B100; while brake specific fuel consumption rises by 2 – 4% for B20 and B40, and 20 – 25% for B100. Regarding emissions, B20, B40, and B100 reduce Particulates Matter (PM), , and by approximately 70 – 79%, 65 – 85%, and 12 – 40%, respectively. NOₓ increases by 3 – 10% for B20 and B40, but decreases by 45 – 65% for B100. These results demonstrated that coffee-ground Biodiesel is a promising renewable fuel that does not compete with food resources and can substantially mitigate environmental pollution.
Tóm tắt
Nghiên cứu này được thực hiện nhằm đánh giá hiệu suất và phát thải của động cơ D229-4 sử dụng Biodiesel từ bã cà phê thải. Nhiên liệu Diesel và Biodiesel được pha trộn theo tỷ lệ 0%, 20%, 40% và 100%. Kết quả mô phỏng 1200 – 2400 vòng/phút cho thấy khi tăng tỷ lệ Biodiesel, hiệu suất giảm nhẹ, công suất và moment xoắn giảm 2 – 5% ở B20, B40 và 15 – 20% ở B100; suất tiêu hao nhiên liệu tăng 2 – 4% ở B20, B40 và 20 – 25% ở B100. Về phát thải khi sử dụng B20, B40 và B100, hàm lượng muội than, , giảm lần lượt khoảng 70 – 79%, 65 – 85% và 12 – 40%; riêng tăng 3 – 10% ở B20 và B40, nhưng giảm 45 – 65% ở B100. Kết quả cho thấy Biodiesel từ bã cà phê là một nguồn nhiên liệu tái tạo tiềm năng, không cạnh tranh với lương thực và góp phần đáng kể làm giảm ô nhiễm môi trường.
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