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All Journal Jurnal Pendidikan dan Teknologi Indonesia Journal of Applied Agricultural Science and Technology
Ayuni Lestari
Politeknik Negeri Sriwijaya
Agriculture, Biological Sciences & Forestry Education Engineering

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Analisa Efisiensi Termal Water Tube Boiler Berdasarkan Rasio Udara Bahan Bakar LPG Untuk Memproduksi Saturated dan Superheated Steam Ayuni Lestari; Valencia Tara Situmorang; Tahdid Tahdid; K.A Ridwan; Agus Manggala
Jurnal Pendidikan dan Teknologi Indonesia Vol 1 No 10 (2021): JPTI - Oktober 2021
Publisher : CV Infinite Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jpti.105

Abstract

Boiler adalah suatu bejana tertutup yang terbuat dari baja dan digunakan untuk menghasilkan steam. Agar dapat menghasilkan steam diperlukan pembakaran. Pembakaran merupakan reaksi eksotermis yang berlangsung sangat cepat, yang membebaskan energi berupa panas dan nyala api (flame temperature) serta mampu menyebarkan panas melalui suatu medium. Agar pembakaran terjadi dengan optimal maka harus memperhatikan nilai rasio udara bahan bakar atau Air Fuel Ratio (AFR). Tujuan dari penelitian ini untuk meningkatkan efisiensi termal water tube boiler. Bahan bakar yang digunakan adalah gas LPG. Oleh karena itu, pada penelitian kali ini akan difokuskan untuk menentukan rasio udara dengan bahan bakar gas yang paling tepat sehingga didapatkan hasil pembakaran dan produksi steam yang maksimal. Rasio udara bahan bakar gas dan excess air yang digunakan yakni, 15,78 (5%), 15,93 (6%), 16,08 (7%), 16,23 (8%), 16,38 (9%).
Characterization of Rubber Seed (Hevea Brasiliensis) as Raw Material for The Production of Biofuel Ayuni Lestari; Muhammad Yerizam; Abu Hasan
Journal of Applied Agricultural Science and Technology Vol. 7 No. 3 (2023): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v7i3.140

Abstract

Rubber seeds from the Musi Rawas region in South Sumatra have great potential for rubber seed plantations. However, their utilization has not been maximized and they are often treated as plantation waste. This research aims to obtain the characteristics of rubber seeds as raw materials for biofuel production, so that the rubber seeds from the South Sumatra region can be utilized by the community and not just considered as plantation waste. In the first treatment, the rubber seeds are crushed to obtain the seed coat and the kernel. The crushed rubber seed shells are finely ground and sieved, while the kernel is pressed to extract vegetable oil using a pressing tool. The test methods used to determine the characteristics of the rubber seed shells include proximate analysis and calorific value, while GC-MS analysis is employed for the rubber seed oil. The proximate analysis of the rubber seed shell (RSS) yielded the following results: moisture content of 15.97 wt%, volatile matter of 47.43 wt%, fixed carbon of 32.45 wt%, and ash content of 4.15 wt%. The calorific value of the rubber seed shell was found to be 3312.8694 calories per gram. For the GC-MS yield of the rubber seed oil, the composition is as follows: palmitic acid 7.32%, linoleic acid 34.69%, oleic acid 45.35%, and pentadecanoic acid 8.86%. Based on the obtained results, rubber seeds show promising potential as raw materials for biofuel production through the pyrolysis process.
Co-Authors Abu Hasan Agus Manggala K.A Ridwan Muhammad Yerizam Tahdid Tahdid Valencia Tara Situmorang