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All Journal Rekayasa Mesin Majalah Ilmiah MOMENTUM INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Rekayasa Material, Manufaktur & Energi Rang Teknik Journal Manutech : Jurnal Teknologi Manufaktur Jurnal Teknik Mesin Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat Jurnal Engine: Energi, Manufaktur, dan Material Jurnal Teknik Industri Terintegrasi (JUTIN) Reswara: Jurnal Pengabdian Kepada Masyarakat Jurnal Mesin Nusantara Journal of Energy, Material, and Instrumentation Technology International Journal of Multidisciplinary Research and Literature (IJOMRAL) METAL : Jurnal Sistem Mekanik dan Termal Dulang: Jurnal Pengabdian Kepada Masyarakat Menara Pengabdian Jurnal Salingka Abdimas International Journal of Innovation in Mechanical Engineering and Advanced Materials Jurnal Pengabdian kepada Masyarakat Dewantara Jurnal Polimesin IJIMCE : International Journal of Innovation in Mechanical Construction and Energy IJIS Edu : Indonesian Journal of Integrated Science Education
Desmarita Leni
Teknik Mesin, Fakultas Teknik, Universitas Muhammadiyah Sumatera Barat
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Transportation Other

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Design Of Portable Cold Storage Using Solar Power Defri Pratama; Desmarita Leni; Dedi Erawadi; Hendri Candra Mayana
IJIMCE : International Journal of Innovation in Mechanical Construction and Energy Vol. 1 No. 3 (2024): IJIMCE : International Journal of Innovation in Mechanical Construction and Ene
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/ijimce.v1i3.47

Abstract

This research aims to design and analyze a portable cold storage system that uses solar energy as the main power source. The research methods used include literature studies, system design, and design analysis to evaluate the performance of the cold storage being designed. The designed system has a volume of 2.93 liters with an operational temperature of -2°C, which requires a total energy requirement of 114,912 kWh per day to maintain storage temperature stability under external environmental conditions of 30°C. The solar panels used have an efficiency of 18% with a standard irradiation exposure of 1000 W/m², capable of producing 4,788 watts of power, which shows sufficient efficiency to meet the cold storage energy needs. Based on the analysis, it is estimated that 43.2 solar panels are needed to meet daily energy needs, which indicates the large scale of energy infrastructure needed to maintain cold storage operations 24 hours a day. In addition, to ensure operational continuity, especially at night or when exposure to sunlight is low, energy storage capacity in the form of batteries of 230 kWh is required so that the cold storage can function without interruption. The results of this research show that with proper planning, the use of renewable energy through solar power can be optimized to support the sustainability of cold storage operations, even in environments with significant energy availability challenges. This research makes an important contribution to the development of efficient and sustainable portable cold storage technology
Design of Solar-Powered Cold Storage with Thermoelectric Cooling to Improve Fruit Storage Quality: A Case Study of Local Fruit Sellers Hendra; Leni, Desmarita; Mulyadi; Zinvi Fu; Sir Anderson
IJIMCE : International Journal of Innovation in Mechanical Construction and Energy Vol. 1 No. 3 (2024): IJIMCE : International Journal of Innovation in Mechanical Construction and Ene
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/ijimce.v1i3.54

Abstract

The main problem faced by local farmers and fruit vendors is the lack of efficient and energy-saving storage facilities, causing fruits to often experience quality degradation and spoilage. This study aims to design and test a prototype of solar-powered cold storage with a thermoelectric cooling system (TEC) as an energy-efficient and environmentally friendly storage solution. The prototype uses a 100-watt solar panel as the primary energy source, combined with a Peltier TEC1 module to generate cooling. The test results show that the system can lower the internal temperature to 12°C within 3 hours. The system also achieves an energy efficiency of 18.07%, which is considered sufficient for small-scale thermoelectric applications. The use of solar energy enables the system to operate independently without relying on conventional electricity, offering an energy-saving and environmentally friendly solution. This prototype is deemed suitable for application in tropical regions, such as Indonesia, which has abundant solar energy potential throughout the year. This technology is expected to be a practical solution for farmers and small-scale vendors to reduce post-harvest losses while supporting carbon emission reduction efforts in the agricultural sector.
Perancangan Trainer Ac Mobil Untuk Meningkatkan Keterampilan Praktis Siswa Teknik Kendaraan Ringan SMK Dhuafa Padang Leni, Desmarita; Dwiharzandis, Aggrivina; Karudin, Arwizet; Yermadona, Helga; Anjelika, Dea Qori; Anuar, Bakri
Reswara: Jurnal Pengabdian Kepada Masyarakat Vol 6, No 1 (2025)
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/rjpkm.v6i1.5240

Abstract

Metode pembelajaran konvensional sering kali kurang efektif dalam memberikan gambaran nyata tentang cara kerja sistem AC mobil, sehingga siswa mengalami kesulitan dalam memahami komponen dan fungsinya. Untuk mengatasi permasalahan ini, kegiatan pengabdian kepada masyarakat ini memperkenalkan Trainer AC Mobil sebagai alat praktikum interaktif yang dirancang untuk mendukung pembelajaran sistem pendingin kendaraan. Kegiatan ini dilaksanakan di SMK Dhuafa padang, dengan melibatkan 15 siswa dari jurusan Teknik Kendaraan Ringan yang didampingi oleh 4 orang guru, dengan metode pelaksanaan yang mencakup sosialisasi, penyerahan trainer, pengenalan komponen, pelatihan cara pengoperasian, dan perawatan dasar alat. Hasil evaluasi menunjukkan bahwa pada aspek pemahaman komponen trainer, siswa memperoleh skor rata-rata 3.73 dari skala 5, yang menandakan pemahaman yang cukup baik. Pada aspek kemampuan mengoperasikan trainer, siswa memperoleh rata-rata skor 3.53, yang menunjukkan bahwa sebagian besar siswa dapat mengoperasikan trainer dengan mandiri, meskipun beberapa masih memerlukan bimbingan. Sementara itu, pada aspek minat dan partisipasi aktif, siswa menunjukkan antusiasme tinggi dengan skor rata-rata 4.13. Hasil ini mengindikasikan bahwa Trainer AC Mobil tidak hanya berhasil meningkatkan pemahaman dan keterampilan siswa, tetapi juga mampu memicu minat belajar yang lebih besar
DEQOREL: An Intelligent Service Robot to Improve Restaurant Service Efficiency Qori Anjelika, Dea; Leni, Desmarita; Muchlisinalahuddin
IJIMCE : International Journal of Innovation in Mechanical Construction and Energy Vol. 2 No. 1 (2025): IJIMCE : International Journal of Innovation in Mechanical Construction and Ene
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Cafes have become a favorite place for various groups by providing a variety of food and drinks. However, challenges such as worker fatigue and human error often interfere with service. To overcome these problems, this research developed an intelligent waiter robot named Deqorel. Deqorel is designed to improve restaurant service efficiency through trajectory sensor-based automatic navigation and optimization algorithms. Deqorel is equipped with a 15-inch interactive screen, an energy-efficient DC motor, and a lithium-ion battery that supports operations for long periods of time. The robot frame uses 304 stainless steel with stress calculations to ensure strength and safety. The results show that Deqorel is able to provide accurate, fast, and responsive service in a dynamic restaurant environment, thereby increasing customer satisfaction as well as restaurant productivity.
PELATIHAN 3D PRINTING UNTUK JURUSAN KENDARAAN RINGAN SMK DHUAFA PADANG Sumiati, Ruzita; Nofriadi, Nofriadi; Fajri Arsyah, Ahmad Hasnul; Nusyirwan, Nusyirwan; Adriansyah, Adriansyah; Leni, Desmarita; Nasirwan, Nasirwan
Jurnal Pengabdian Masyarakat Polmanbabel Vol. 5 No. 02 (2025): DULANG : Jurnal Pengabdian Kepada Masyarakat
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/dulang.v5i02.412

Abstract

3D Printing training has been implemented as part of efforts to develop technical competence in vocational education, especially for students of the Light Vehicle Department at SMK Dhuafa Padang. This study aims to assess the effectiveness of 3D Printing training in improving students' skills in the application of additive manufacturing technology in the automotive sector. The training methods applied include the delivery of theoretical materials, technical demonstrations, and exercises. Evaluation of the effectiveness of the training was conducted through comparative analysis of pre-test and post-test results, which aims to measure the improvement of participants' competence before and after attending the training. The results of data analysis showed a significant increase in students' mastery of concepts and technical skills, especially in the use of 3D printing technology for component manufacturing. This training is expected to be a relevant and adaptive learning model, in order to prepare SMK graduates to face the dynamics of the automotive industry which is increasingly based on technology and innovation
Optimizing Students' Understanding of the Mechanical Properties of Stainless Steel through Interactive Learning Media based on Machine Learning Karudin, Arwizet; Leni, Desmarita; Nasrullah, Nasrullah; Sumiati, Ruzita; Haris, Haris
IJIS Edu : Indonesian Journal of Integrated Science Education Vol 6, No 2 (2024): July 2024
Publisher : UIN Fatmawati Sukarno Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29300/ijisedu.v6i2.3114

Abstract

Traditional learning media tends to have limitations in providing interactive experiences that can stimulate better understanding. This is supported by changes in learning styles among students, influenced by extensive exposure to computers and the internet, leading students to prefer learning with the aid of visualizations. This research designs, develops, and tests a machine learning-based visualization tool integrated with the Streamlit framework to enhance students' understanding of the mechanical properties of materials. This visualization tool consists of four main features: data analysis, correlation analysis, 3D visualization, and prediction models using machine learning. The data used for training the machine learning model includes tensile test data of low-alloy steel, comprising mechanical properties, chemical elements, and heat treatment temperatures. The research results indicate that the visualization tool can illustrate the cause-and-effect relationships of parameters influencing the changes in the mechanical properties of low-alloy steel. Each feature in this visualization tool can be utilized to support the analysis of mechanical properties and improve students' understanding of material mechanical properties. Additionally, the visualization tool is evaluated by experts, with information accuracy scoring 4 in the good category, visualization quality at 4.25 in the good category, suitability for learning at 4 in the good category, and ease of use at 4.5 in the good category. Nevertheless, further research and development are needed to test and expand the use of this visualization tool in various learning contexts and other material fields.
Design and Construction of Mini Single Turbine PLTU Demonstration Equipment: As a Thermodynamics Learning Media K, Arwizet; Leni, Desmarita; Lapisa, Remon; Kusuma, Yuda Perdana; Anugrah, Pinto
IJIS Edu : Indonesian Journal of Integrated Science Education Vol 6, No 1 (2024): January 2024
Publisher : UIN Fatmawati Sukarno Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29300/ijisedu.v6i1.2386

Abstract

Thermodynamics is often considered difficult for students to grasp because it involves abstract concepts that are challenging to visualize without visual aids or physical demonstrations. This research involves the design of a mini power plant trainer as a teaching tool to visualize basic thermodynamics concepts, such as heat transfer, conversion of heat energy into mechanical energy, phase change from steam to liquid, and thermal efficiency. The trainer is designed according to the requirements of the system provided by the thermodynamics lecturer at the State University of Padang, taking into consideration the teaching material and safety aspects. The power plant trainer consists of four main components, including a boiler with a 15-liter water capacity equipped with an automatic sensor stove that can shut off when it reaches 4 bars of pressure and restarts when it drops below 4 bars, a single propeller turbine, a 12-volt generator, and a vertical condenser with coolant flow in the same direction as the steam flow. The testing results of the trainer yielded a boiler efficiency of 46%, thermal efficiency of 21%, with the steam power generated by the boiler at approximately 1734 Watts, condenser power at 1478 Watts, cooling power to convert wet steam into liquid at 119 Watts, and turbine power at 375 Watts. The maximum electrical power reached 2.94 Watts with a voltage of 12 volts and a current of 0.21 amperes. It took 31 minutes to heat 15 liters of water in the boiler to steam with a temperature of 146°C and a pressure of 58 Psi. The trainer can be operated (can rotate the generator) for 4 minutes until the steam pressure drops to 20 Psi. Based on the testing results, the trainer can be operated smoothly and is capable of illustrating difficult thermodynamics concepts that are hard to visualize. Therefore, in an effort to enhance the quality of learning, this trainer can be used as a simulation tool for thermodynamics education.
PEMANFAATAN MINYAK JELANTAH UNTUK PEMBUATAN SABUN PADA BANK SAMPAH LIDAH MERTUA KOTA PADANG Earnestly, Femi; Firdaus, Firdaus; Leni D, Desmarita; Rahmawati, Rahmawati; Muharni, Riza; Yermadona, Helga
Reswara: Jurnal Pengabdian Kepada Masyarakat Vol 5, No 1 (2024)
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/rjpkm.v5i1.3927

Abstract

Masalah sampah menjadi salah satu permasalahan dalam lingkungan hidup yang paling signifikan terjadi di Indonesia termasuk Kota Padang. Bank sampah merupakan salah satu solusi dari Pemerintah dimana bank sampah lidah mertua sebagai mitra kegiatan pebgandian kami adalah salah satu bank sampah kota Padang, dengan nasabah 100 orang. Nasabah bank sampah mempunyai permasalahan tentang bagaimana pengolahan minyak jelantah yang sudah menumpuk dirumah mereka masing-masing. Minyak jelantah jadi momok yang menakutkan bagi mereka karena apabila dipakai untuk menggoreng akan menyebabkan penyakit berbahaya (kanker, hipertensi, jantung, stroke), sedangkan minyak jelantah yang dibuang dapat mengakibatkan kerusakan lingkungan. Tujuan kegiatan pengabdian ini adalah memberikan inovasi untuk memanfaatkan minyak jelantah menjadi suatu produk bernilai jual, serta dapat meningkatkan keterampilan mitra. Metode pengabdian dilaksanakan yaitu workshop dan pendampingan secara langsung dengan peserta sebanyak 17 orang. Pembagian kuisioner awal dan akhir diberikan kepada mitra untuk mengetahui sejauh mana pemahamannya terhadap pembuatan sabun ini, dimana terjadi peningkatan keterampilan mitra dari 57% ke 93,53%.
Co-Authors -, Nasrullah - ., Islahuddin Abbas, Muhammad Rabiu Ade Usra Berli Adriansyah Adriansyah Adriansyah Aggrivina Dwiharzandis Angelia, Nike Anjelika, Dea Qori Anuar, Bakri Anugrah, Pinto Arwizet Arwizet, Arwizet Aulia Naro Camim, Moh. Candra Mayana, Hendri Dedi Erawadi Dedi Erawadi Dedi Wadianto Defri Pratama Deviya Aprilman Elvis Adril Erlinda Syam Fajar Kurnia Putra Fajri Arsyah, Ahmad Hasnul Fajri Dwi Putra Fajri, Ahmad Hasnul Fardinal Fardinal Fathir Alqodri Femi Earnestly Firdaus Firdaus Firdaus Firdaus Firdaus G Gunawarman, G Hanif Hanif Hanif Hanif Haris Haris Haris Haris, Haris Helga Yermadona Hendra . Hendra Hendra Hendrix Triwaldi Ichlas Nur Jana Hafiza Jon Affi, Jon Kesuma, Dytchia Septi Khan, Sharif kusuma, Yuda Perdana Lega Putri Utami Maimuzar Maimuzar Moh. Chamim Muchlisinalahuddi Muchlisinalahuddi Muchlisinalahuddin Muchlisinalahuddin Muchlis nalahuddin Muharni, Riza MULYADI Mulyadi . Nasirwan Nasirwan Nofriadi Nofriadi Nofriyanti, Elsa Nota Effiandi Nusyirwan Nusyirwan Peng, Lim Hooi Predi Maulana Putra Qori Anjelika, Dea Rahmawati Rahmawati Rahmawati, Rahmawati Rakiman Rakiman Rakiman Rakiman Remon Lapisa Rivanol Chadry Ruzita Sumiati Safril Safril Sagyta Yeniza Putri Sharma, Jai Kumar Sir Anderson Teguh Haria Aditia Putra Ultra Marsedi Venny Selviaty Veny Selviyanty Yazmendra Rosa Yuda Perdana Kusuma Yuli Yetri Yusnaweti Yusnaweti Zinvi Fu Zulbahri Bahar