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All Journal Rekayasa Mesin WARTA Jurnal Rekayasa Material, Manufaktur & Energi Machine : Jurnal Teknik Mesin Jurnal Elemen Majamecha Journal of Mechanical Engineering Warta LPM AutoMech : Jurnal Teknik Mesin
Dewi, Rany Puspita
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences

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Mesin Pengaduk Adonan Untuk Meningkatkan Produktivitas UKM Keripik Sayur “Jaya Makmur” Di Kota Magelang Dewi, Rany Puspita; Hastuti, Sri; Arnandi, Wandi
WARTA LPM WARTA LPM, Vol. 25, No. 1, Januari 2022
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/warta.v25i1.15823

Abstract

UKM “Jaya Makmur” terletak di Kecamatan Magelang Tengah Kota Magelang, yang berlokasi sekitar 1,5 km dari pusat kota Magelang. UKM “Jaya Makmur” telah memproduksi beragam keripik berbahan baku sayuran yang dimulai sejak tahun 2009. Produksi keripik sayur terdiri dari beberapa tahapan, salah satu proses yang masih dilakukan secara manual yaitu proses pengadukan adonan. Hal ini menyebabkan proses pengadukan memerlukan waktu yang lebih lama. Tujuan kegiatan Program Kemitraan Masyarakat (PKM) yaitu untuk meningkatkan omzet UKM “Jaya Makmur” dan meningkatkan pemahaman serta ketrampilan masyarakat mengenai penerapan teknologi tepat guna. Kegiatan PKM di Kramat Selatan, Kota Magelang dilaksanakan dalam dua tahap. Tahap pertama adalah observasi dengan melakukan pengumpulan data berupa dokumentasi dan diskusi dengan Ibu Esti Widayati dan Kepala Desa sebagai stakeholder. Tahap kedua adalah pengembangan solusi melalui teknologi tepat guna yaitu mesin pengaduk adonan. Hasil kegiatan PKM adalah berupa mesin pengaduk adonan dengan kapasitas 60 kg/hari dengan daya 20 watt. Aplikasi mesin pengaduk adonan dapat meningkatkan kapasitas produksi yang semula 20 kg/hari menjadi 60 kg/hari. Selain juga dapat meningkatkan taraf hidup masyarakat Kramat Selatan, Kecamatan Magelang Utara, Kota Magelang, dengan meningkatnya omzet UKM “Jaya Makmur” hingga 100%.
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

Abstract

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.
Peningkatan Produktivitas Pakan Ternak Itik Kelompok Usaha Bersama di Magelang Dewi, Rany Puspita; Trisma Jaya Saputra; Mario Ammar Rasyid
Warta LPM WARTA LPM, Vol. 26, No. 4, Oktober 2023
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/warta.v26i4.2161

Abstract

The Joint Business Group “Makmur Abadi” is situated around 0.5 km from Tidar University, is focused in duck farming. The processing of animal feed, in this case the pounding of egg shells as the main raw material, is still done manually with a limited capacity using a pestle and mortar. It causes the size of the feed produced is not uniform. The aim of this activity was to improve the capacity and quality of animal feed produced by partners. The ctivities was done in two phases. The first stage was started with data collection and discussions with partners. The second stage was comtinued with coordination to develop the stage of solving the problem through the application of an egg shell flour machine. Measuring the effectiveness of animal feed production was carried out by quantifying the capacity and quality of the animal feed generated and measuring the increase in residents' knowledge pre and post the implementation of the machine. The primary output of this activity was an egg shell flour machine which is made with a capacity of 20 kg/hour, consumes 367.75 watts of power, and is equipped with various filter sizes that can be customized to the need of partners. The use of an egg shell flour machine was able to increase production capacity from only 10 kg/day to 20 kg/hour with a more uniform size that is easily digested by livestock. This activity was also able to increase public awareness up to 90%.
Perancangan Poros dan Pasak Mesin Crusher Sampah Plastik untuk Pengolahan Refuse Derived Fuel Kurniawana,, Akbar; Saleh, Arif Rahman; Dewi, Rany Puspita
Journal of Mechanical Engineering Vol 7, No 2 (2023): Journal of Mechanical Engineering
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/jom.v7i2.8096

Abstract

Mesin crusher sampah plastik merupakan mesin yang digunakan untuk mengubah sampah plastik menjadi partikel yang lebih kecil lagi. Salah satu komponen yang penting dalam mesin crusher adalah poros yang memiliki peran sebagai tempat pisau pencacah dan tranmisi daya dari motor penggerak. Terdapat beberapa hal yang perlu dipertimbangkan dalam perancangan poros seperti material, momen puntir, dan tegangan. Proses perancangan poros mencakup pemilihan material, pemilihan dimensi, dan bentuk poros. Berdasarkan data yang diperoleh, mesin crusher sampah plastik membutuhkan daya maksimum penggerak sebesar 8,92 kW untuk menggerakkan poros dengan diameter minimum 31,9 mm. Namun, desain poros yang dibuat berbentuk bertangga sehingga poros memiliki diameter sebesar 36 mm dan diameter poros sebagai tempat bantalan 40 mm. Poros ini juga dilengkapi pasak dengan ukuran 10×8 mm sebagai pengunci untuk elemen pulley dan roda gigi. Material yang digunakan untuk poros dan pasak adalah Baja AISI 1035 karena kuat dan mudah dibentuk.
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

Abstract

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
Mesin Chopper untuk Meningkatkan Kualitas dan Kuantitas Pakan Usaha Ternak Kambing “Arrahman” Dewi, Rany Puspita; Saputra, Trisma Jaya; Rahayu, Tri Puji
Warta LPM WARTA LPM, Vol. 27, No. 3, November 2024
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/warta.v27i3.6481

Abstract

The "Arrahman" partner is located in Kerten, Krincing Village, Secang District, Magelang manages around 200 to 300 goats. The process of preparing cattle fodder such as elephant grass and corn stalks is done manually using a knife. It causes the feed preparation process take longer considering the large number of goats being managed. The aim of this activity is to contrive and manufacture a chopper to help the process of cutting grass feed more effectively and efficiently. Because it is able to produce more feed capacity in a shorter time with a finer size. Activities are carried out in several stages. The first step is data accumulation and coordination together with partner. Continuing to the next step, the development of solving partner problems through chopper design. The method for measuring the efficiency and effectiveness of cutting cattle fodder is done by quantifying the capacity and quality of cattle fodder produced and quantifying the amount of rising in insight and knowledge of residents which is carried out by looking at before and after the application of the chopper. The primary result is a chopper with a capacity of 100 kg/hour with a 5.5 hp gasoline engine. Chopper parts can be disassembled and assembled, making it easier for partners to maintain and repair. The chopper increases the capacity of cutting animal feed to 100 kg/hour. The activity is able to increase residents' understanding and insight by up to 90%. It is because through design and construction activities, residents are able to understand and gain new insight into the process of making chopper machines.
Analisis Sudut Penyekat Pada Mesin Penukar Kalor Tipe Shell and Tube Muhaimin, Rijal Arif; Dewi, Rany Puspita; Taufik, Ikhwan; Iswahyudi, Sigit
Majamecha Vol. 6 No. 2 (2024): 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.v6i2.3511

Abstract

Heat exchanger adalah mesin penukar panas yang berfungsi untuk mengubah suhu dan fasa suatu fluida, baik dari panas ke dingin maupun sebaliknya. Mesin ini banyak digunakan di industri pengolahan minyak dan gas, pembangkit listrik, serta industri kimia. Untuk meningkatkan kinerja dan efisiensi, dilakukan penelitian dengan mendesain sudut baffle sebesar 180°, 200°, dan 220°. Penelitian ini menggunakan simulasi perangkat lunak Ansys Workbench R2 dan perhitungan matematis. Luas permukaan heat exchanger terbesar ditemukan pada variasi sudut 220° dengan luas 8,17 m². Nilai LMTD tertinggi dicapai pada sudut 180° dengan suhu 74,4?C, yang juga menghasilkan distribusi perpindahan panas dan efisiensi optimal sebesar 83,845%, berkat tingkat turbulen 6026,6 yang menjaga aliran fluida tetap stabil. Penurunan tekanan tertinggi terjadi pada sudut 180°, dengan nilai tekanan masuk minyak 120 Pa dan air 0,915 Pa. Besar perpindahan panas tercatat sebesar 7615,840 W/m²°C. Dengan demikian, semakin kecil sudut baffle, semakin besar perpindahan kalor yang terjadi.
PENGARUH KONSENTRASI HCl DALAM PROSES HIDROLISIS PADA PEMBUATAN BIOETANOL KULIT PISANG KEPOK Alfiansyah, Irsyad; Mujiarto, Sigit; Sulistiyo, Raka Mahendra; Dewi, Rany Puspita
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 1 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i1.300

Abstract

Dependence on fossil fuels results in depletion of petroleum. In solving this problem, it is necessary to use alternative fuels in the form of bioethanol. Bioethanol is made by utilizing kepok banana peels. There are quite a lot of banana peels, approximately one third of the bananas that have not been peeled. This study was conducted to analyze the ethanol content, water content, density, and viscosity of kepok banana peel bioethanol. This study uses an experimental method of the effect of HCl concentration (2%, 5%, and 8%) in the hydrolysis process in the manufacture of kepok banana peel bioethanol. From the results of the study, the best bioethanol characteristics at a concentration of 2% HCl with an ethanol content of 9%, a water content of 70.52%, a density of 0.9861 g/ml, and a viscosity of 0.010768212 dPa.s. The characteristics of the bioethanol produced are different from the characteristics of pertalite.
PERANCANGAN ALAT PRESS SARI JAMU MENGGUNAKAN SISTEM HYDRAULIC KAPASITAS 2 KG Rahmat, Bagas Subakti; Dewi, Rany Puspita; Budiono, Herru Santosa
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 1 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i1.331

Abstract

The process of making herbal medicine still uses traditional methods for making herbal medicine. One of them is the process of squeezing herbal juice. The semi-automatic herbal juice press tool uses a hydraulic system with AISI 304 material. The results of designing the herbal juice press tool are the design of a press tool with a capacity of 2 kg and has dimensions of length 250 mm, width 250 mm, and height 250 mm. The load on static testing is 100 kg. The von Mises stress value in the frame is 38.23 MPa. The deformation value of the jamu juice press frame is 0.065. The smallest safety factor value for the jamu juice press frame is 5. The von Mises stress value for the jamu juice press tube is 21.057 MPa. The maximum deformation value of the jamu juice press tube is 0.017 mm. The smallest safety factor value for the herbal juice press tube is 9.735.
Desain Perancangan Mesin Pemarut Kelapa Dengan Pengaman Sistem Tuas Mekanis Ikhsan, Nurikhsan Hera Pratama; Dewi, Rany Puspita; Saputra, Trisma Jaya
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.v7i1.3794

Abstract

Tumbuhan kelapa memiliki banyak manfaat dan juga memiliki nilai jual yang cukup tinggi. Seiring perkembangan zaman, banyak alat-alat inovasi yang berfungsi untuk mempermudah kerja manusia. Penelitian ini akan merancang sebuah mesin pemarut kelapa dengan pengaman sistem tuas mekanis. Metode penelitian ini menggunakan metode permodelan menggunakan software solidworks 2020 dan melakukan perhitungan yang bertujuan untuk mengetahui hasil perhitungan rancangan. Penelitian ini menghasilkan sebuah desain alat pemarut kelapa dengan hasil rangka mesin pemarut kelapa memiliki dimensi ukuran panjang 400 mm, lebar 300 mm, dan tinggi 610 mm. Pisau parut dengan ukuran diameter 76 mm dan memiliki jarak 6 mm pada masing-masing mata parut. Alat ini menggunakan motor listrik dengan daya 0,5 hp. Alat ini menggunakan puli penggerak 2 inch dan puli yang digerakkan 4 inch dengan putaran output 700 rpm. Material yang digunakan pada rangka mesin pemarut kelapa ini menggunakan besi siku sama sisi dengan profil ukuran 30 x 30 x 3 mm yang diberikan pembebanan sebesar 324 N. Dari hasil simulasi mendapatkan nilai von mises stress maksimum sebesar 165,19 MPa, deformasi sebesar 0,963 mm dan nilai safety factor sebesar 1,5.
Co-Authors Agung, Hidayat Alfiansyah, Irsyad Arif Rahman Saleh Arif Rohman Budiono, Herru Santosa Fajarningrum , Nurmala Dyah Fajri, Ahmed Ikhsan, Nurikhsan Hera Pratama Kurniawana,, Akbar Mario Ammar Rasyid Muhaimin, Rijal Arif Nur Hayati R Rizal Isnanto Rahayu, Tri Puji Rahmat, Bagas Subakti Raka Mahendra Sulistiyo Saputra , Trisma Jaya Sigit Iswahyudi Sigit Joko Purnomo Sigit Mujiarto Solly Aryza Sumardi . Syaifudin, Akbar Taufik, Ikhwan Trisma Jaya Saputra Wandi Arnandi Zuljian, Bima