SUDARMA, ANDI FIRDAUS (2025) KORELASI ATOMISASI BAHAN BAKAR BERBASIS MEDAN MAGNET TERHADAP KONSUMSI BAHAN BAKAR DAN EMISI GAS BUANG MESIN DIESEL DI UNIVERSITAS MERCU BUANA PERIODE: JANUARI - MARET 2025. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
This study aims to evaluate the effect of electromagnetic field exposure on fuel consumption and exhaust smoke opacity in a Mitsubishi diesel engine with a displacement of 2477 cc, using Pertamina Dex fuel. The electromagnetic field intensities applied were 2000, 2400, and 2800 Gauss, while engine speed (RPM) was set at three different levels: 1500, 2000, and 2500 RPM. The research was conducted through an experimental approach in a laboratory setting, where measurements of fuel consumption (in liters per hour) and smoke opacity (in percentage) were recorded for each operating condition. Data analysis was performed using multiple linear regression to develop a predictive model that represents the relationship between the independent variables (RPM and magnetic field intensity) and the two main response variables. The results showed that increasing the RPM significantly raised both fuel consumption and smoke opacity. Conversely, increasing the magnetic field intensity had a significant effect in reducing smoke opacity. Under the highest test condition (2800 Gauss and 2500 RPM), smoke opacity decreased drastically from 16.22% (without magnetic exposure) to 7.22%, indicating the effectiveness of electromagnetic exposure in improving combustion quality. Additionally, fuel consumption efficiency was achieved, with savings of approximately 15% at 2800 Gauss compared to the non-magnetized condition. The developed predictive model demonstrated high accuracy, with a coefficient of determination (R²) of 0.938 for smoke opacity and 0.958 for fuel consumption. The model’s validity was also supported by significance testing, which showed that both independent variables contributed statistically to the response. Visualization of predicted versus actual data showed a strong match, reinforcing the model’s capability to reliably predict system performance. Overall, the findings of this study confirm that electromagnetic field application can serve as an effective technical solution for improving combustion efficiency and reducing emissions, without the need for mechanical modifications to the fuel system. This study also reflects the application of engineering principles in professionalism and environmental sustainability, aligned with the development of eco-friendly technology in the energy and transportation sectors. Penelitian ini bertujuan untuk mengevaluasi pengaruh paparan medan elektromagnetik terhadap konsumsi bahan bakar dan tingkat kepekatan asap buang pada mesin diesel Mitsubishi berkapasitas 2477 cc yang menggunakan bahan bakar Pertamina Dex. Variasi medan elektromagnetik yang diterapkan sebesar 2000, 2400, dan 2800 Gauss, sementara putaran mesin (RPM) diatur pada tiga tingkat berbeda, yaitu 1500, 2000, dan 2500 RPM. Penelitian dilakukan melalui pendekatan eksperimental di laboratorium, di mana pengukuran konsumsi bahan bakar (dalam liter per jam) dan tingkat kepekatan asap (dalam persen) dicatat untuk masing-masing kondisi operasi. Analisis data dilakukan menggunakan regresi linier berganda untuk membentuk model prediktif yang merepresentasikan hubungan antara variabel bebas (RPM dan medan magnet) terhadap dua variabel respons utama. Hasil pengujian menunjukkan bahwa peningkatan RPM secara signifikan meningkatkan baik konsumsi bahan bakar maupun tingkat kepekatan asap buang. Sebaliknya, peningkatan intensitas medan magnet menunjukkan pengaruh yang signifikan dalam menurunkan kepekatan asap. Pada kondisi tertinggi (2800 Gauss dan 2500 RPM), tingkat kepekatan asap menurun drastis dari 16,22% (tanpa medan magnet) menjadi 7,22%, menunjukkan efektivitas medan elektromagnetik dalam meningkatkan kualitas pembakaran. Selain itu, konsumsi bahan bakar juga mengalami efisiensi, di mana terjadi penghematan sekitar 15% pada intensitas medan magnet 2800 Gauss dibandingkan dengan kondisi tanpa magnetisasi. Model prediktif yang dikembangkan menunjukkan tingkat akurasi yang tinggi, dengan nilai koefisien determinasi (R²) sebesar 0,938 untuk kepekatan asap dan 0,958 untuk konsumsi bahan bakar. Validitas model juga diperkuat dengan uji signifikansi yang menunjukkan bahwa kedua variabel bebas berkontribusi secara statistik terhadap respons. Visualisasi hasil prediksi terhadap data aktual menunjukkan kesesuaian yang baik, menegaskan kemampuan model dalam memprediksi performa sistem secara andal. Secara keseluruhan, temuan penelitian ini menegaskan bahwa penggunaan medan elektromagnetik dapat menjadi solusi teknis yang efektif untuk meningkatkan efisiensi pembakaran dan mengurangi emisi tanpa perlu modifikasi mekanis pada sistem bahan bakar. Penelitian ini juga mencerminkan penerapan prinsip keinsinyuran dalam hal profesionalisme dan keberlanjutan lingkungan, sejalan dengan upaya pengembangan teknologi ramah lingkungan di sektor transportasi dan energi.
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