Browsing by Author "Romy, Romy"

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    Exergy Analysis Of Gas Turbine Power Plant 20 Mw In Pekanbaru-Indonesia
    (wahyu sari yeni, 2019-07-01) Martin, Awaludin; Miswandi, Miswandi; Prayitno, Adhy; Kurniawan, Iwan; Romy, Romy
    The performance of a 20 MW gas turbine power plant was described by using the exergy analysis and data from the plant’s record books. The first and second laws of thermodynamics, as well as the mass and energy conservation law, were applied in each of the components. The results show that more exergy destruction occured in the combustion chamber up to 71.03% or 21.98 MW. Meanwhile, the lowest exergy occured in the compressor at 12.33% or 3.15 MW. Thermal efficiency of the gas turbine power plant, according to the first law, was 33.77%, and exergy efficiency was 32.25%.
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    Freeze Vacuum Drying With Utilized Waste Heat of Condenser by Quick Drying Method
    (wahyu sari yeni, 2019-07-01) Martin, Awaludin; Prayetno, Utari; Wahyudi, Wandi; Kurniawan, Iwan; Romy, Romy
    Freeze vacuum drying process is an optimum process to dry the product without changing the physical and chemical properties of materials. The advantages of drying with freeze vacuum drying are can be maintain the structures, nutrient, and colors of original substances. A weakness of freeze vacuum drying is its high consumption of energy due to the long drying time required especially in the process of sublimation below triple point condition. The aim of this research are to optimizing freeze vacuum drying in order to reducing energy consumption by utilized waste heat of condenser to speed up the sublimation process and by using quick drying method. Thefreezing temperatures in this study were 6oC and 9oC with a variation of the drying time is 1, 2 and 4 hours. This research was result the water content losses in yam bean are 78% at a freeze temperature -9oC with drying time 4 hours.
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    Pengaruh Variasi Komposisi Campuran Bioetanol, Putaran Poros Dan Pemasangan Vacuum Tube Tipe 4y2 Terhadap Prestasi Pada Motor Bakar Bensin Empat Langkah Satu Selinder
    (wahyu sari yeni, 2019-06-01) Romy, Romy; Martin, Awaludin; Setiawan, Agus
    Pemanfaatan bioetanol sebagai bahan bakar alternatif yang dapat diperbaharui (renewable) merupakan salah satu langkah yang dapat dilakukan dalam menjaga ketersedian energi. Tujuan penelitian ini adalah untuk mengetahui pengaruh variasi putaran poros, variasi komposisi campuran bahan bakar bensin dengan etanol dan pemasangan vacuum tube tipe 4Y2 terhadap komsumsi bahan bakar, torsi, daya poros dan efisiensi termal efektif. Metode penelitian yang dipergunakan dalam penelitian ini adalah metode penelitian secara eksperimental. Penelitian ini menggunakan variasi putaran poros 500, 600, 700, dan 800 rpm serta variasi komposisi campuran bensin dengan etanol E0, E20 dan E40. Hasil yang diperoleh dari penelitian ini adalah motor bakar bensin dengan bahan bakar E20 dan E40 dan vacuum tube tipe 4Y2 menghasilkan komsumsi bahan bakar yang dibutuhkan lebih rendah, dan efisiensi thermal efektif lebih tinggi sedangkan dengan bahan bakar bensin murni menghasilkan torsi dan daya poros efektif lebih tinggi