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All Journal Jurnal Rekayasa Mesin Eksergi: Jurnal Teknik Energi
Luthfiana, Nadia Tasya Ayu
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Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering

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Karakterisasi Alat Pengering Tipe Kabinet Berbahan Bakar Liquefied Petrolium Gas (LPG) Dengan Penambahan Low Cost Material Heat Storage (LCMHS) Apriandi, Nanang; Sumarno, F. Gatot; An-Nizhami, Avicenna; Luthfiana, Nadia Tasya Ayu; Kholifah, Nevita Nur; A’tohillah, Muhammad Khusnul; Prakoso, Raden Gumilang Aji
Jurnal Rekayasa Mesin Vol 17, No 2 (2022): Volume 17, Nomor 2, Agustus 2022
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v17i2.3690

Abstract

Efektifitas kerja alat pengering utamanya mempersyaratkan temperatur ruang pengering tinggi, kelembaban udara relatif (RH) rendah dan hemat energi. Salah satu upaya peningkatan efektifitas kerja alat pengering adalah dengan penambahan heat storage. Umumnya, material heat storage yang digunakan adalah material komersil dengan harga yang relatif mahal dan ketersediaanya tidak merata di setiap daerah. Diperlukan material heat storage alternatif yang murah dan mudah ditemukan, salah satunya adalah limbah gram besi proses permesinan. Makalah ini mengeksplorasi low cost material heat storage (LCMHS) yang diintegrasikan ke dalam alat pengering tipe kabinet berbahan bakar liquefied petrolium gas (LPG) dengan memanfaatkan limbah gram besi praktikum permesinan di Jurusan Teknik Mesin, Politeknik Negeri Semarang sebagai material heat storage. Tujuan dari penelitian ini adalah untuk melakukan karakterisasi terhadap alat pengering dengan penambahan material heat storage berbasis limbah gram besi pada ruang plenum, dimana karakterisasi alat pengering melibatkan distribusi temperatur di ruang plenum, distribusi temperatur di ruang pengering, dan ditribusi kelembaban udara relatif (RH) di ruang pengering, dengan memvariasikan massa limbah gram besi 3,5 kg, 6,5 kg, dan 9,5 kg. Hasilnya, temperatur rata-rata di ruang plenum berturut-turut adalah 72,08°C, 87,2°C, dan 99,53°C, dengan temperatur tertinggi di ruang pengeringan yaitu 51,26°C pada massa gram besi 3,5 kg dan RH terendah 24,1% dengan massa gram besi 9,5 kg. Secara keseluruhan, limbah gram besi praktikum permesinan dapat digunakan sebagai alternatif material heat storage berbiaya rendah pada sistem alat pengering.
Biogas Desulfurization Using Iron Gram Waste Machining Practicum Process at The Department of Mechanical Engineering, Politeknik Negeri Semarang Apriandi, Nanang; Widyaningsih, Wiwik Purwati; Margana, Margana; Surindra, Mochamad Denny; Supriyo, Supriyo; Luthfiana, Nadia Tasya Ayu
Eksergi Vol. 18 No. 3 (2022): SEPTEMBER 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v18i3.3785

Abstract

The important matter about biogas as an alternative energy source was the presence of hydrogen sulfide (H2S) which is very corrosive. The biogas desulfurization process was absolutely necessary to reduce the risk of damage to the equipment. For small-scale applications, the selection of the type of adsorbent became important to reduce additional costs. One alternative material that can be used was iron gram waste. The aim of this study was to investigate the use of iron gram waste resulting from the machining practicum process at the Department of Mechanical Engineering, Politeknik Negeri Semarang as an alternative material for making adsorbents. Iron gram waste was processed into Iron (III) Oxide (Fe2O3) and Iron (III) Hydroxide (Fe(OH)3), formed into billets with an average billet mass of 250 gr. The performance test of the adsorbent in the biogas desulfurization process was carried out under conditions of variation in the flow rate of biogas feed 1, 2, and 3 liters per minute, and the volume of biogas purified in one process was 50 liters. As a result, the most optimum performance was obtained in the test with a feed biogas flow rate of 1 liter/minute, with a percentage reduction in H2S levels contained in the biogas by an average of 82,56%.
Co-Authors An Nizhami, Avicenna A’tohillah, Muhammad Khusnul F. Gatot Sumarno, F. Gatot Kholifah, Nevita Nur Margana Margana Mochammad Denny Surindra Nanang Apriandi Prakoso, Raden Gumilang Aji Supriyo Supriyo Wiwik Purwati Widyaningsih