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Uji Performa Efektivitas Mesin Parut Kelapa Dengan Variasi Jarak Dan Susunan Gigi Pemarut Kapasitas 1 kg Syaifudin, Akbar; Dewi, Rany Puspita; Purnomo, Sigit Joko
Majamecha Vol. 7 No. 1 (2025): Majamecha
Publisher : Program Studi Teknik Mesin, Fakultas Teknik, Universitas Islam Majapahit, Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamecha.v7i1.3795

Penanganan pasca panen harus dapat di maksimalkan untuk mengantisipasi penyusutan kuantitas dan kualitas hasil panen untuk di olah. Metode dalam penelitian ini penulis melaksanakan penelitian terhadap variasi jarak dan susunan gigi pemarut dengan melakukan uji parut menggunakan variasi jarak dan susunan dengan putaran yaitu variasi inline dan miring dengan kerapatan antar gigi yaitu 2 mm, 4 mm, 6 mm dan jarak kerapatan antar baris yaitu 5 mm dan menggunakan variasi putaran 933,3 rpm dan 700 rpm Berdasarkan hasil pengujian yang telah dilakukan dengan menggunakan putaran 700 rpm mendapatkan hasil yang terbaik adalah variasi jarak 6 mm x 5 mm Dengan hasil waktu 04 : 03 menit, berat kelapa setelah di parut 893,6 g dan jumlah santan 583,3 ml. Dengan hasil tersebut menunjukkan bahwa susunan gerigi parut dan jarak antar gerigi dengan putaran pemarutan berpengaruh dengan hasil efisiensi waktu, berat kelapa setelah diparut, dan hasil santan yang diperoleh.

UJI KARAKTERISTIK PELET REFUSE DERIVED FUEL (RDF) HASIL PROSES PENGOLAHAN SAMPAH MENGGUNAKAN PELLETIZER DEWI, RANY PUSPITA
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.5606

Municipal solid waste can be processed into solid fuel in the form of Refuse Derived Fuel (RDF) pellets and used as a fuel substitute. One of them is through the Waste Processing Technology at the Source (TOSS) method. Solid waste generally has a low ash content ranging from 20-40%. RDF is combustible waste or rubbish that goes through a crushing and filtering process by turning it into solid fuel. RDF pellets can be made by pressing using a pellet machine or pelletizer. The aim of this research is to test the characterization of pelletizer performance in processing urban waste into RDF pellets. The characterization tested includes analysis of bound carbon content, volatile content and ash content. The research was carried out by varying the composition of organic waste and inorganic waste, namely 1 sample A (70% organic components + 30% inorganic components), sample B (60% organic components + 40% inorganic components), sample C (50% organic components + 50% inorganic components, sample D (40% organic components + 60% inorganic components), and sample E (30% organic components + 70% inorganic components). The lowest volatile was produced in sample E with a value of 52.8445%, and the lowest ash content was produced in sample A with a value of 4.5466%.

Desain Perancangan Mesin Pemotong Kentang Multifungsi Rohman, Arif; Saputra, Trisma Jaya; Dewi, Rany Puspita
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.23876

We often encounter potatoes in eating places and restaurants that have been made into ready-to-eat food because they are easy to process into various kinds of food, one of which is french fries. The aim of this research is to produce a design for a multifunctional potato cutting machine that is efficient and portable. The concept refers to the design process of designing a machine by determining the dimensions, size and constituent components displayed on the working drawings. The results of this multifunctional potato cutting machine design resulted in the design of machine components such as a potato funnel hopper with dimensions of 300 mm x 80 mm x 222 mm, a potato pusher with dimensions of 80 mm x 114 mm, and the main frame of the machine with dimensions of 421 mm x 300 mm x 380 mm. Three variations of cutting knives consisting of flat, long/stick-shaped and soft-shaped cutting knives. The knife driver used is an electric motor with a power of 125 watts, blade rotation speed of 700 rpm, and another drive transmission. Overall, the results of this design produce a design drawing for a potato cutting machine with dimensions of 421 mm x 300 mm x 544 mm, so that this machine is more efficient and portable.

Studi Eksperimental Variasi Konsentrasi Perekat dan Bentuk Biobriket Limbah Baglog Jamur Tiram dengan Perekat Kanji Zuljian, Bima; Dewi, Rany Puspita; Hayati, Nur
AutoMech : Jurnal Teknik Mesin Vol 5, No 01 (2025): Mei
Publisher : Universitas Muhammadiyah Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24269/jtm.v5i01.11862

Peningkatan pemakaian energi yang digunakan untuk tujuan industri, transportasi, dan rumah tangga mengakibatkan peningkatan kebutuhan akan minyak bumi meningkat. Untuk mengatasi masalah ini, pemerintah telah menerapkan kebijakan diversifikasi energi. Energi alternatif dapat menjadi upaya untuk menekan angka ketergantungan terhadap gas dan minyak bumi, salah satunya adalah biobriket. Tujuan penelitian ini adalah mengetahui pengaruh konsentrasi perekat dan bentuk biobriket terhadap sifat fisis biobriket, yaitu nilai kalor, kadar air, kadar abu, kadar volatile matter, kadar fixed carbon, dan laju pembakaran. Pada penelitian ini menggunakan limbah dari baglog jamur tiramyang didapat dari petani setempat. Metode yang digunakan adalah metode eksperimen. Pengujian nilai kalor mengacu pada standar ASTM D-5865, pengujian kadar air mengacu pada standar ASTM D-3173, pengujian kadar abu mengacu pada standar ASTM D-3174, pengujian kadar volatile matter mengacu pada standar ASTM D-3175, pengujian kadar fixed carbon mengacu pada standar ASTM D-3172, dan pengujian laju pembakaran mengacu pada SNI 01-6235-2000. Hasil pengujian menunjukkan bahwa konsentrasi perekat mempengaruhi tiap-tiap sifat fisis biobriket, semakin tinggi perekat, maka nilai kadar air, kadar abu, kadar volatile matter cenderung meningkat. Maka, nilai kalor menjadi semakin turun dan laju pembakaran semakin baik. Hasil pengujian juga menunjukkan bahwa bentuk biobriket secara tidak langsung mempengaruhi sifat fisis biobriket. Diperoleh bentuk prisma segienam lebih memiliki laju pembakaran yang lebih baik dibanding prisma segitiga karena memiliki distribusi panas yang lebih baik. Kata Kunci : biobriket, baglog jamur tiram, perekat kanji, biomassa

CHARACTERIZATION OF REFUSE DERIVED FUEL (RDF) PELLETS IN THE MUNICIPAL SOLID WASTE PROCESSING PROCESS Dewi, Rany Puspita; Saputra , Trisma Jaya; Fajarningrum , Nurmala Dyah; Agung, Hidayat
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.1937

Municipal Solid Waste (MSW) can be processed to be Refuse Derived Fuel (RDF) pellets. Generally, RDF is combustible waste that processed by crushing and filtering through converting it to solid fuel. RDF pellets can be made by pressing using a pellet machine names pelletizer. The research goal was to analyze the characterization of RDF pellets processing by pelletizer. The characterization tested includes calorific value and water content. The research was done by varying the composition of waste that are sample A (70% organic + 30% inorganic), sample B (60% organic + 40% inorganic), sample C (50% organic + 50% inorganic), sample D (40% organic + 60% inorganic), and sample E (30% organic + 70% inorganic). The research results showed that the highest calorific value was obtained in sample E, 4199,2754 cal/g and the lowest water content was obtained in sample E, 23,0416%.

ANALYSIS OF FIXED CARBON AND VOLATILE MATTER BRIQUETTES OF PINE SAWDUST AND COCONUT SHELL WASTE Dewi, Rany Puspita; Sumardi, Sumardi; Isnanto, Rizal
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1421

Briquetting technology became one appropriate method that can be used to convert biomass waste into a renewable energy source. Sources of biomass raw materials that have promising potential are pine sawdust and coconut shell waste. Sawdust has potential for about 0.78 million m3/year and coconut shell waste around 360 thousand tons/year. The research aim was to analyse the effect of the carbonization temperature to volatile matter and fixed carbon of briquette. The research was done by variating carbonization temperature at 400 oC, 500 oC, and 600 oC. The result showed that at carbonization temperature of 400 oC, the volatile matter and fixed carbon was 42.28% and 55.74%. The volatile matter and fixed carbon are 43.19% and 54.96%, found at carbonization temperature 500 oC. The highest fixed carbon 55.98% and the lowest volatile matter 42.19% was found from carbonization temperature at 600 oC. The carbonization temperature in briquetting process affects the volatile matter and fixed carbon of briquette.

TECHNO ECONOMIC ANALYSIS OF BIOMASS AS AN ALTERNATIVE ENERGY HOUSEHOLDS AND SMALL INDUSTRIES Dewi, Rany Puspita; Trisma Jaya Saputra; Mario Ammar Rasyid
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1692

Briquetting technology became one appropriate method that can be used to convert biomass waste into a renewable energy source. Sources of biomass raw materials that have promising potential are pine sawdust and coconut shell waste. Sawdust has potential for about 0.78 million m3/year and coconut shell waste around 360 thousand tons/year. The research aim was to analyze the effect of the carbonization temperature to volatile matter and fixed carbon of briquette. The research was done by variating carbonization temperature at 400oC, 500oC, and 600oC. The result showed that at carbonization temperature of 400oC, the volatile matter and fixed carbon was 42.28% and 55.74%. The volatile matter and fixed carbon are 43.19% and 54.96%, found at carbonization temperature 500oC. The highest fixed carbon 55.98% and the lowest volatile matter 42.19% was found from carbonization temperature at 600oC. The carbonization temperature in briquetting process affect the volatile matter and fixed carbon of briquette

OPTIMASI DESAIN SHELL AND TUBE HEAT EXCHANGER TIPE SINGLE SEGMENTAL BAFFLE DENGAN VARIASI JUMLAH BAFFLE DAN POTONGAN BAFFLE MENGGUNAKAN METODE COMPUTATIONAL FLUID DYNAMIC Fajri, Ahmed; Saputra, Trisma Jaya; Dewi, Rany Puspita
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1793

The heat exchanger is a device used to transfer heat between two process streams. In general, the flow that occurs in shell and tube heat exchangers is parallel flow or counter flow. To change the flow in the shell and tube heat exchanger into the cross flow, baffles can be added. The ideal cutting for baffle cutting is taken 20% to 35% of the inner diameter of the shell while the baffle distance is one-fifth of the inside diameter (ID) of the shell or 2 inches. Shell type "E" consists of 9 tubes with a 45° square pattern arrangement and single segmental baffle type with different orientations of baffle spacing and cuts 6, 8, 10 baffles and 25% and 30% of the shell inner diameter. CFD simulation results were obtained in the form of temperature distribution contours, pressure flow profile. The analysis shows that a properly selected baffle spacing and cut has the maximum potential to improve the heat exchanger performance up to 59.15%, as shown in the heat exchanger with 10/25% configuration. Increasing the number of baffles can increase the effectiveness-NTU by about 11% to 13%, while the same baffle spacing with different baffle cuts shows that 30% baffle cuts can reduce the pressure drop problem by about 8% to 11% compared to 25% baffle cuts.

Studi Eksperimental Variasi Konsentrasi Perekat dan Bentuk Biobriket Limbah Baglog Jamur Tiram dengan Perekat Kanji Zuljian, Bima; Dewi, Rany Puspita; Hayati, Nur
AutoMech : Jurnal Teknik Mesin Vol. 5 No. 01 (2025): Mei
Publisher : Universitas Muhammadiyah Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24269/jtm.v5i01.11862

Peningkatan pemakaian energi yang digunakan untuk tujuan industri, transportasi, dan rumah tangga mengakibatkan peningkatan kebutuhan akan minyak bumi meningkat. Untuk mengatasi masalah ini, pemerintah telah menerapkan kebijakan diversifikasi energi. Energi alternatif dapat menjadi upaya untuk menekan angka ketergantungan terhadap gas dan minyak bumi, salah satunya adalah biobriket. Tujuan penelitian ini adalah mengetahui pengaruh konsentrasi perekat dan bentuk biobriket terhadap sifat fisis biobriket, yaitu nilai kalor, kadar air, kadar abu, kadar volatile matter, kadar fixed carbon, dan laju pembakaran. Pada penelitian ini menggunakan limbah dari baglog jamur tiramyang didapat dari petani setempat. Metode yang digunakan adalah metode eksperimen. Pengujian nilai kalor mengacu pada standar ASTM D-5865, pengujian kadar air mengacu pada standar ASTM D-3173, pengujian kadar abu mengacu pada standar ASTM D-3174, pengujian kadar volatile matter mengacu pada standar ASTM D-3175, pengujian kadar fixed carbon mengacu pada standar ASTM D-3172, dan pengujian laju pembakaran mengacu pada SNI 01-6235-2000. Hasil pengujian menunjukkan bahwa konsentrasi perekat mempengaruhi tiap-tiap sifat fisis biobriket, semakin tinggi perekat, maka nilai kadar air, kadar abu, kadar volatile matter cenderung meningkat. Maka, nilai kalor menjadi semakin turun dan laju pembakaran semakin baik. Hasil pengujian juga menunjukkan bahwa bentuk biobriket secara tidak langsung mempengaruhi sifat fisis biobriket. Diperoleh bentuk prisma segienam lebih memiliki laju pembakaran yang lebih baik dibanding prisma segitiga karena memiliki distribusi panas yang lebih baik. Kata Kunci : biobriket, baglog jamur tiram, perekat kanji, biomassa

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