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All Journal Rotasi Jurnal Ilmiah Poli Rekayasa Elektron Jurnal Ilmiah Majalah Ilmiah MOMENTUM Jurnal Teknik Mesin Media Perspektif IJIMCE : International Journal of Innovation in Mechanical Construction and Energy
Hendra Hendra
Jurusan Teknik Mesin, Politeknik Negeri Padang
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Rancang Bangun Mesin Penggulung Tali Rafia Rahman Fauzi; Nasrullah Nasrullah; Feidihal Feidihal; Hendra Hendra
Jurnal Teknik Mesin Vol 12 No 1 (2019): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

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

Abstract

Raffia rope is very popular because of its many uses, in other words it is a versatile tool. In general, raffia ropes are widely used for various matters such as business in agriculture, as a binder, as a decoration for crafts, as hangers for clothes, sewing sacks, as reinforcement materials, and many others. Raffia straps are available in the form of rolls. At this time, there are still many processes of rolling raffia still using manual methods such as direct hand rolling or using traditional methods that still use a lot of human power so that it is considered ineffective and inefficient. Because there is still a lot of traditional process of rolling the rope or using hands, the idea arises to make a raffia rope rolling machine using a motorbike and transmission. Technically appropriate technology is a bridge between traditional technology and advanced technology, therefore socio-cultural and economic aspects are also dimensions that must be taken into account in managing appropriate technology. From the desired goals, appropriate technology must apply methods that are resource-efficient, easy to maintain, and have minimal minimalistic impact. The aim of this research is to design, make and test rapia rope rollers so that they are suitable to be used to help facilitate the work of the community in the process of rolling rapia. From the results of design design. From the results of the testing obtained the tool is able to produce rolls as much as an average of 58 rolls per hour
Kajian Potensi Air Pengerak Pompa Hidram untuk Mengairi Sawah di Daerah Pakandangan Kabupaten Padang Pariaman Ichlas Nur; Nota Effiandi; . Mulyadi; . Maimuzar; . Hendra
Jurnal Ilmiah Poli Rekayasa Vol 15, No 1 (2019): -
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (613.301 KB) | DOI: 10.30630/jipr.15.1.139

Abstract

Energy is needed in mobilizing a mechanism both electric energy and energy derived from fossils. Hydram pump is a device to raise water from a low place to a high place by utilizing water impacts without using renewable energy. In Pakandangan, Padang Pariaman Regency, there is a water source that cannot be utilized to flow through the rice fields around 10 Ha. Because the rice fields are higher with water sources. The methodology is to survey the location and design the dimensions of the hydram pump. The results obtained head data height of incoming water is 2.5 meters, the height of water lift to the shelter is 7 meters the flow of water entering the pump is 25 lt / sec. The dimensions of the pump are the result of the design of a hydram 1 size with an inside diameter of 2 inches
Penentuan Interval Waktu Preventive Maintenance Mesin Dengan Tindakan Berdasarkan Metode Reliability Centered Maintenance (RCM) Pada PT PLN (Persero) UPK Bukittinggi Dedi Erawadi; Tri Artono; Ibnul Nanda Rianza; Hendra Hendra; Adriansyah Adriansyah; Abdul Halim
MEDIA PERSPEKTIF : Journal of Technology Vol 14, No 1 (2022): MEDIA PERSPEKTIF
Publisher : Politeknik Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46964/jtmp.v14i1.1525

Abstract

UPK Bukittinggi is a state electricity company in charge of 3 hydropower plants in West Sumatra with a vision to become the leading electricity company in Southeast Asia. To realize this vision, the company must continue to monitor a good level of productivity on the quality of engine performance which must be maintained. For this reason, it is necessary to propose a preventive maintenance plan for each hydropower plant with actions based on the Reliability Centered Maintenance (RCM) method. The purpose of the study was to calculate the amount of time for repair (Mean Time To Repair) and the amount of time the damage occurred (Mean Time To Failure) as well as determine the maintenance time interval schedule for the equipment experiencing the highest downtime at UPK Bukittinggi. Where the RCM method is integrated with the Failure Mode Effects Analysis (FMEA) method which is used as an analysis of the failure mode that occurs by calculating the highest Risk Priority Number (RPN) value on the machine and then calculating the time interval for damage as the basis for determining the maintenance schedule. The result of the research is that with routine scheduling of machine maintenance will be obtained with time intervals obtained by time intervals and maintenance actions using the RCM method.
Perancangan Mesin Pemutar Gerabah Dengan Kekuatan Tumpuan Maksimal 10 kg Sir Anderson; Yazmendra Rosa; Khairul Amri; Maimuzar Maimuzar; Hendra Hendra; Aqli Ridawansyah
Jurnal Teknik Mesin Vol 16 No 1 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.1.980

Abstract

Pottery is an art craft made from clay which besides having a high use value also has a pretty good aesthetic value. Pottery craft business has existed in Indonesia since ancient times until now. This business has a deficiency in the production machine part, where the production machine still uses human power as the main driving force during the rotation during the pottery making process. Therefore, a modification of a better pottery turning machine is needed to support the pottery craft business. The design of this pottery turning machine uses a working drawing design of a pottery turning machine product with a rotating speed that can be adjusted according to work requirements via a speed control pedal. The pottery turning machine has a strong construction with machine specifications of length 760 x width 400 x height 700 mm, with the addition of 2 pulleys with a first pulley diameter of 2.5 inches, and a second pulley diameter of 12 inches with a connecting belt using type A-57. And by using umbrella gears with a ratio of z1 = 25 and z2 = 50 with a maximum pedestal capacity of 10 kg.
Pengaruh Sudut Kemiringan dan Orientasi Solar Cell Terhadap Luaran Energi Listrik Sebagai Kajian Power Charge Station untuk Kendaraan Alat Berat Dian Wahyu; Yazmendra Rosa; Hanif Hanif; Andriyanto Andriyanto; Hendra Hendra
ROTASI Vol 25, No 1 (2023): VOLUME 25, NOMOR 1, JANUARI 2023
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.25.1.%p

Abstract

Perkembangan teknologi alat berat saat ini semakin fokus pada teknologi hemat energi, ramah lingkungan dan aman. Kendaraan alat berat bertenaga listrik merupakan solusi untuk mengurangi emisi gas buang karbon dan antisipasi habisnya bahan bakar fosil di masa depan. Kendaraan alat berat bertenaga listrik menggunakan baterai kelak sebagai pengganti mesin diesel. Perpres Nomor 5 Tahun 2006 Tentang Kebijakan Energi Nasional mendorong masyarakat untuk meningkatkan penggunaaan energi baru dan terbarukan. Kementerian ESDM mengeluarkan data jumlah energi surya harian rata-rata di Indonesia sebesar 3-6,8 kWh/m²/hari, dan di Padang berkisar antara 3.5-5,1 kWh/m²/hari. Kemampuan kerja dari sel surya diantaranya sangat dipengaruhi oleh arah datanganya sinar matahari dan kemiringan sudut. Solar tracking system jika diaplikasikan pada suatu PLTS akan menambah biaya. Untuk Membantu masyarakat kota Padang, penelitian ini dilakukan bertujuan untuk menentukan arah dan sudut kemiringan yang optimal dalam memasang sel surya secara tetap. Sudut  dan arah optimal adalah sudut kemiringan dan arah sel surya yang memberikan produksi energi listrik harian yang paling besar. Dalam studi ini menggunakan kajian eksperimental pada panel surya tipe monocrystalline 100 Wp. Sel surya diuji pada beberapa sudut kemiringan (0º,15º,30º,45º,60º,75º) dan arah (10º,15º,20º) menghadap ke Utara Barat Laut. Hasil penelitian memperlihatkan jumlah energi listrik yang maksimal dihasilkan sebuah panel surya dengan ukuran 120 Wp berada pada kondisi pemasangan 15o sudut kemiringan panel dengan arah 10,5o menghadap ke barat laut. Berdasarkan kajian perencanaan perhitungan pemanfaatan energi listrik hasil keluaran solar cell sebagai penyuplai kendaraan alat berat, dari perhitungan penggunaan energi listrik dapat menghemat biaya operasional sekitar 49%.
Prediksi Daya Listrik Pada Pembangkit Listrik Siklus Gabungan Berdasarkan Kondisi Lingkungan Menggunakan Metode Machine Learning Hendra, Hendra
Elektron : Jurnal Ilmiah Volume 15 Nomor 2 Tahun 2023
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.0.0.415

Abstract

The utilization of machine learning methods in energy simulation enables the optimization of energy use and improves energy efficiency. In this research, the modeling of predicting power output was conducted under full load conditions in a Combined Cycle Power Plant (CCPP) based on the surrounding environmental conditions. Historical data of CCPP operation were used to model and predict power output under various environmental conditions. In this study, four machine learning algorithms, namely Linear Regression (LR), Decision Tree (DT), Random Forest (RF), and Artificial Neural Network (ANN), were compared and evaluated for their performance. The evaluation metrics used to measure the model performance were Mean Absolute Error (MAE), Root Mean Square Error (RMSE), and R-Squared. The research results indicate that the Random Forest (RF) model achieved the best performance compared to other models with MAE of 2.314, RMSE of 3.372, and R-squared of 0.961. Additionally, the RF model also performed the best compared to other models in external testing with new data, where RF obtained values of MAE 2.579, RMSE 3.315, and R-squared 0.957. These results are consistent with the previous testing, indicating that RF has stable and reliable performance in predicting larger and more diverse datasets. This research contributes to understanding the potential application of machine learning in the power generation industry, especially in CCPP.
Perancangan Turbin Crossflow untuk Pembangkit Listrik Tenaga Mikro Hidro di Padayo Indarung Padang Hendra, Hendra; Leni, Desmarita; Erawadi, Dedi; Nusyirwan, Nusyirwan; Maimuzar, Maimuzar
JURNAL ILMIAH MOMENTUM Vol 20, No 1 (2024)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v20i1.10652

Abstract

Perancangan Turbin Crossflow untuk Pembangkit Listrik Tenaga Mikro Hidro di Padayo Indarung Padang merupakan aplikasi praktis dari pengetahuan yang diperoleh selama studi akademik. Tujuan dari penelitian ini adalah merancang turbin crossflow yang sesuai dengan parameter awal yang diperoleh dari survei lapangan. Turbin crossflow berfungsi mengkonversi energi potensial air menjadi energi mekanik yang menggerakkan turbin, kemudian diubah menjadi energi listrik. Berdasarkan data awal perancangan, dengan debit air 0,04 m3/s dan ketinggian air 5 m, dimensi turbin yang didapatkan adalah diameter luar runner 0,3 m, lebar runner 0,15 m, diameter dalam runner 0,2 m, dengan 18 sudu dan jari-jari kelengkungan sudu 48,13 mm. Putaran yang dihasilkan turbin adalah 296,72 rpm. Poros runner memiliki diameter Ø34 mm dan panjang 470 mm. Untuk mentransmisikan daya dari turbin ke generator, digunakan dua buah puli dengan diameter Ø16 inchi dan Ø3 inchi, serta 2 sabuk V type A79. Metode yang digunakan dalam penelitian ini adalah perancangan turbin crossflow berdasarkan parameter hidrokinetik dan dimensi yang disesuaikan dengan karakteristik aliran air yang tersedia di lokasi penelitian. Penelitian ini penting karena memberikan kontribusi dalam pengembangan teknologi energi terbarukan dengan memanfaatkan sumber daya air secara efisien dan ramah lingkungan.
Design of a Rotary Table Hydroponic System for Agricultural Improvement in Limited Urban Land Predi Maulana Putra; Leni, Desmarita; Muchlisinalahuddin, Muchlisinalahuddin; Hendra, Hendra; Kusuma, Yuda Perdana
IJIMCE : International Journal of Innovation in Mechanical Construction and Energy Vol. 1 No. 1 (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.v1i1.10

Abstract

This research focuses on the design of a rotary table hydroponic device for effective, efficient, and space-saving plant growth. With machine dimensions of 1570 x 600 x 2360 mm, a frame made of 2 mm thick 30 x 30 mm galvanized hollow steel, and a 1.5 HP electric motor, the machine is engineered to maximize land utilization in hydroponic methods. Stress analysis on the frame reveals maximum and minimum values of 3,631e+01 MPa and 2,064e-03 MPa, respectively, while the safety factor reaches 1,211e+05 and 6,886e+00, surpassing the safety factor range for static loads. The results of this experiment confirm the effectiveness and safety of the design, demonstrating that this rotary table hydroponic device can be optimally utilized in hydroponic plant cultivation.
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.
Co-Authors -, Nasrullah - Abdul Halim Adriansyah Adriansyah Andriyanto Andriyanto Aqli Ridawansyah Dedi Erawadi Desmarita Leni Dian Wahyu Feidihal Feidihal Hanif Hanif Ibnul Nanda Rianza Ichlas Nur Khairul Amri kusuma, Yuda Perdana Maimuzar Maimuzar Muchlisinalahuddin Mulyadi MULYADI Nota Effiandi Nusyirwan Nusyirwan Predi Maulana Putra Rahman Fauzi Sir Anderson Tri Artono Yazmendra Rosa Zinvi Fu