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All Journal ELKHA : Jurnal Teknik Elektro Syntax Literate: Jurnal Ilmiah Indonesia JURNAL PENDIDIKAN TAMBUSAI BULETIN AL-RIBAATH Jurnal Pengabdian kepada Masyarakat Vokasi International Journal of Integrative Sciences Kapuas
Joni Rahmadi
Politeknik Negeri Pontianak
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry 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 Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Public Health Social Sciences Other

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Studi Kelayakan Pemanfaatan Pembangkit Listrik Kincir Air Terapung Di Desa Ella Hilir Kecamatan Ella Hilir Kabupaten Melawi Rahmadi, Joni; Yusuf, Ismail; Priyatman, Hendro
ELKHA: Jurnal Teknik Elektro Vol 7, No 1 (2015): Edisi Bulan Maret 2015
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.795 KB) | DOI: 10.26418/elkha.v7i1.11184

Abstract

Abstract– Hydroelectric Power Plant (HEPP) use a boost from the water with a specific discharge and dtransformasikan into electricity by generators. River In Rural District of Ella Ella Downstream Downstream Melawi has the potential to be used as energy alternatives, with water flowing speed of 1m / s to 3 m /s. Utilization of Power Plant Feasibility Study Floating In Water Mill Village District of Ella Ella Downstream Downstream Melawi expected to provide an overview as well as a reference for the public and the government about the prospects and benefits are obtained if done on technology implementation or iplementasi floating waterwheel. Based on the lowest current 1 m / s Watermill floating able to produce 533.70 Watt, the highest river currents capable of producing 144,409.90 Watt, a comparison is electricity derived from PT. PLN with a reference group of R1 / 900 where the electricity tariff (TDL) around Rp. 650, - it is not worth the investment, the comparison is electricity derived from the generator, the power specification 1 kVA and price premium / liter Rp. 6.600, - (January 2015) it is well worth the investment Keywords– hydropower, Watermill, Streams, Generator
Analisis Pengaruh Panas pada Baja Kontruksi dengan Pendinginan Air Sungai dan Air Laut terhadap Kekuatan Mekanik Sutrisno Sutrisno; Azmal Azmal; Joni Rahmadi
Vokasi: Jurnal Publikasi Ilmiah Vol 17 No 1 (2022): Vokasi
Publisher : Politeknik Negeri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (730.679 KB) | DOI: 10.31573/vokasi.v17i1.452

Abstract

Abstract: Housing, buildings and factories often fire, this can be caused by electric short circuits, explosions of gas stoves. Extinguishing fires can use river water or sea water. This research is expected to get an overview of data about tensile strength, hardness and mechanical properties due to changes in heat temperature and cooling with river water and sea water on steel construction materials with various operational conditions. The materials used are plain reinforcing steel (BJTP), deformed steel and profiled steel (IWF-400) heated in the heating kitchen with variations of 600 , 700 , 800 and 900 , cooled by river and sea water, carried out Vickers tensile strength and hardness test. The results of the tensile test of BJTP increased by 461.55 N/mm2, the highest cooling of river water was 9000C=345.15N/mm2(53.70%), the lowest was 600 =31.13 N/mm2 (4.84 %). The highest deformation was 900℃=345.15 N⁄mm2 (53.70 %), the lowest was 600 =31.13N/mm2 (4.84 %). The highest IWF-400 was 900 =101.32 N/mm2 (18.93 %), the lowest was 600 =10.85 N/mm2(2.03%). Vickers BJTP hardness test is the highest for cooling river water 900 =35.06 HV (41.32%), the lowest is 600 =2.16 HV (2.55%). Deform 900 = 47.28 HV (53.63%), the lowest 600 =3.88 HV (4.40%). IWF-400 900 =15.52 HV (18.89 %), the lowest 600 =1.66 HV (2.02%). As the temperature increases by cooling seawater and river water, the tensile strength and hardness of the vickers also increase
PENERAPAN SOLAR SEL UNTUK BUDIDAYA IKAN LELE SEBAGAI UPAYA PENGHEMATAN ENERGI PADA PONDOK PESANTREN AL MAS’UDIYAH Nurhaidah Nurhaidah; Dwi Harjono; Tri Pratomo; Widodo PS; Joni Rahmadi; Dovian Iswanda; Jaini Jaini
J-ABDI: Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 5: Oktober 2022
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/jabdi.v2i5.3549

Abstract

Pondok pesantren Al Mas’udiyah Kabupaten Kuburaya Kalimantan Barat, saat ini memiliki usaha budidaya ikan lele sebagai usaha mandiri untuk memenuhi kebutuhan sehari-hari. Selama ini untuk pengisian dan sirkulasi air pada kolam budidaya menggunakan pompa air yang bersumber listrik pada PLN sehingga menambah biaya pengeluaran untuk operasional. Tujuan dari pengabdian kepada masyarakat yang dilakukan adalah merencanakan dan mengaplikasikan Sistem kelistrikan DC memanfaatkan sinar matahari dengan membangun pembangkit listrik tenaga surya. Dengan harapan penggunaan sistem DC tenaga surya dapat mengurangi beban biaya listrik Pondok pesantren. Metode yang diterapkan adalah membangun pembangkit listrik tenaga surya (PLTS) pada budidaya ikan lele. Hasil yang diperoleh, terbangun PLTS yang terdiri dari 2 solar cell 100 WP, pompa air DC 180W, 3 buah lampu DC 10W, baterai 12V 50Ah
Studi Komparatif Efektivitas Perpindahan Kalor dengan Pengaturan Laju Aliran Fluida Pendingin Heat Exchanger Jenis Plate Aliran Searah Joni Rahmadi; Fuazen Fuazen; M. Jusri Suganda Putra
Jurnal Pendidikan Tambusai Vol. 7 No. 1 (2023): April 2023
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.106 KB)

Abstract

Pada penelitian ini akan melakukan eksperimen untuk melihat pengaruh laju aliran terhadap efektivitas perpindahan panas pada penukar kalor aliran searah jenis plate. Dalam penelitian ini, penulis akan melihat pengaruh variasi laju aliran air pendingin terhadap efektifitas perpindahan panas pada penukar kalor jenis Plate aliran searah dengan mempertahankan laju aliran fluida yang didinginkan (fluida panas). Variasi laju aliran massa untuk aliran air pendingin adalah 50 gr/sec, 40 gr/sec dan 30 gr/sec. Sedangkan untuk laju aliran air panasnya dipertahankan tetap untuk setiap variasi laju aliran air pendingin yaitu 50 gr/sec. Penelitian ini bertujuan untuk mengetahui pada laju aliran berapa fluida pendingin yang paling optimal perpindahan panasnya pada aliran searah dengan harapan untuk menjadi sebuah rekomendasi untuk penyetingan laju aliran fluida untuk mendapatkan efektifitas perpindahan panas pada penukar kalor jenis Plate yang aliran fluidanya searah. Dari hasil penelitian didapatkan efektivitas penukar kalor jenis Plate Heat Exchanger aliran searah nilai efektivitas penukar kalor yang paling besar adalah pada laju aliran massa sebesar 50 gr/sec. Sedangkan kenaikan efektivitas penukar kalor pada Plate Heat Exchanger aliran searah berada pada laju aliran massa 40 gr/sec. Dalam penelitian ini menunjukan bahwa ada nilai optimum laju aliran massa tertentu yang bisa menyebabkan kenaikan efektivitas penukar kalor sangat tajam.
Comparative Study of Heat Transfer Rate in Solar Water Heater by Varying the Sun Incoming Angle and Flow Rate of Sun Heat Absorpting Fluid Joni Rahmadi; Fuazen; Indra Lukman
International Journal of Integrative Sciences Vol. 2 No. 3 (2023): March 2023
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/ijis.v1i4.3378

Abstract

The issue of Green Energy, which is about clean and environmentally friendly energy, is a very important issue at this time. Energy that has the above properties is renewable energy. Optimization of energy absorption needs to be done and this is usually done by conditioning or manipulating several parameters so that the energy absorption rate is more effective and efficient.Therefore, the authors conducted a study that is expected to know at the angle of arrival and the rate of flow what is the most optimal absorption of heat from solar energy for the installation and seeding of Solar Water Heater in Pontianak City. And it is expected that with this research can be a recommendation of energy absorption rate, especially those who use solar energy for the Pontianak City area of West Kalimantan to be optimal and efficient.Based on the results of research and analysis conducted in this study for the setting of the sun's coming angle of 450 and coolant fluid flow rate setting, namely the Solar Collector Loop side of 1250 ccm and on the Domestic Heater Water Loop of 1000 ccm in solar water heater. The setting of angles and flow rate settings in the conditions mentioned are very suitable for the condition of Pontianak city area which provides a very stable efficiency value and the value is close to 100% and the value of heat transfer is quite optimal both the absorption of solar heat and heat absorption by heated water
Damage Analysis of Leaf Springs Dump Truck Hino Dutro 130 HD Joni Rahmadi; Fuazen; Adani AS
International Journal of Integrative Sciences Vol. 2 No. 3 (2023): March 2023
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/ijis.v1i4.3536

Abstract

Leaf springs that have been used for a long time will experience a decrease in the quality of the mechanical properties due to the dynamic loads that occur on this component. A comparison of two leaf spring materials is carried out, this is expected to be a solution to increase the strength and toughness of the leaf springs that have been used, the strength and carrying capacity of the damp truck is 8 tons. Spring damage mechanical strength Tensile Strength of Indospring Materials. In a Hino Dutro 130 HD brand car. The average tensile stress is 44.8 (HRC) The average tensile stress is 1407.8 N/mm2 The hardness in specimen 1 is 1407 N/mm2 in specimen 2, the hardness is 1408 N/mm2 in specimen 3, the result is hardness 1409 N/mm2 on specimen 4 with a hardness of 1407 N/mm2 and on specimen 5 the force value of hardness is 1408 N/mm2 Bending test of Indospring Material that has been carried out on Bending test data of Indospring Material to analyze the mechanical strength of spring damage. Strength of Indospring Material. In a Hino Dutro 130 HD brand car. Tensile force Hardness average 1407.8 N/mm2 HOP Material Bend, Indospring. In a Hino Dutro 130 HD brand car. The average hardness force is 1407.8 N/mm2. So that the strength of this material is feasible and good for use while loading trucks. Which is flat paved, so the weight of the cargo transported is not known with certainty. However, it can be estimated based on the carrying capacity, the weight of the cargo ranges from 7-10 tons, for one transport
Pelatihan Pemijahan Pemijahan Ikan Lele Secara Semi Alami di desa Sungai Rengas, Kecamatan Sungai Kakap Kabupaten Kubu Raya Melalui Rekayasa hormone Oxitocin Tuti Puji Lestari; Farida Farida; Hastiadi Hasan; Joni Rahmadi; Afridalianti Afridalianti
Jurnal Buletin Al-Ribaath Vol 20, No 1 (2023): Buletin Al-Ribaath
Publisher : Universitas Muhammadiyah Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/br.v20i1.4961

Abstract

Pemijahan Semi alami adalah metode perkawinan ikan yang dilakukan dengan rangsangan hormonal dan ovulasinya secara alami, hormone yang digunakan dalam pemijahan ini yaitu oxitocin, hoormon oxitocin merupakanhormon yang memiliki fungsi untuk membantu dalam proses ovulasi telur. Tujuan pengabdian ini untuk meningkatkan wawasan anggota POKDAKAN terhadap proses pemijahan ikan lele sebagai upaya peningkatan produksi benih ikan lele. Kegiatan Pengabdian Masyarakat (PKM) diadakan dalam 3 sesi di mana sesi pertama pendekatan masalah mitra, kedua pelatihan serta praktik langsung terhadap penggunaan hormone dalam pemijahan ikan dan sesi ketiga monitoring. Berdasarkan hasil pelaksanaan pengabdian diperoleh Hasil kegiatan ini menunjukkan bahwa peserta memahami materi yang diberikan dengan hasil nilai posttes 10-100%, selain itu keberhasilannya ditunjukkan adanya respon positif dari peserta, dengan banyaknya anggota POKDAKAN yang mengajukan pertanyaan terkait kegiatan pelatihan tersebut dan juga hasil produksi postlarva pemijahan semi alami dalam induk percontohan sebesar 48.240 – 84.680 ekor.Kata kunci:Ikan Lele, Oxitocin, Pemijahan Semi alami
Pengaruh Perendaman Air Laut Terhadap Sifat Mekanik pada Hasil Pengelasan Plat St 37 pada Lambung Kn. Ae-012 Distrik Navigasi Kelas Iii Pontianak Joni Rahmadi; Fuazen; Eko Julianto; Hasanudin
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v8i8.13252

Abstract

In the current era of industrialization, welding techniques have been widely used, covering the work of shipping, bridges, steel frames, pipelines and so on, although this is not the main objective, it is a means to achieve a better manufacturing process. so you have to really pay attention to the suitability between the properties of the welding itself, namely the strength of the connection and pay attention to the connection to be welded, so that the results of the welding are as expected. Welding applications include shipyard construction in the framework of making bodies and other parts, so it is necessary to pay attention to the relationship to the corrosion rate that occurs at welding joints. Seawater intrusion on steel construction corrodes the structure due to the content of chloride and sulfate ions in seawater which react to the chemical elements of the steel. So that the corrosion rate that occurs greatly affects the mechanical properties of the ST 37 plate welding results on the KN hull. AE-012 Pontianak Class III Navigation District, on tensile strength and bending strength in the workpiece, HAZ area, and base metal. Testing the strength of the welding joints with Electric Arc Welding using a current strength of 120 Amperes on mild steel material (ST 37) against the effect of salt water immersion for 20 days, 35 days and 50 days the following values are obtained: [i] At 20 days of immersion time the value the tensile strength is 202.08 N/mm2 , 35 days the tensile strength value is 215.42 N/mm2 and 50 days the tensile strength value is 221.46 N/mm2 , [ii] For the tensile strength values at immersion of 35 days and 50 days has a value that tends to increase, this is somewhat different from the value of the tensile strength at 20 days immersion time which tends to decrease the value of the tensile strength without immersion. The effect of salt water immersion on the value of bending strength in mild steel (ST 37), it was found that: [i] At 20 days of immersion the bending strength value was 1500 N/mm2, 35 days the bending strength value was 1845 N/mm2 and 50 days the bending strength value was the bending strength is 1460 N/mm2 , [ii] The bending strength value at 35 days immersion has a value that tends to increase closer to the bending strength value without immersion, this is somewhat different from the bending strength value at 50 days immersion which tends to decrease considerably at compare without immersion.
Analisa Pemanfaatan Energi Terbuang (Wasted Energy) pada Perencanaan Heater di PT Samudera Windu Cold Storage Erlangga Atidhira Hadijaya; Fuazen; Joni Rahmadi
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v8i8.13420

Abstract

One type of heat exchanger that is widely used is the shell and tube type heat exchanger. The feasibility of making this heat exchanger is seen from the use of heating fluid and heated fluid, how much economic value is obtained. From the data obtained, that in the process of making ice cubes using cold storage which is in the cooling process in the condenser using river water and has a high enough temperature, so that it can be used as a heating source. Through the concept of the Energy Management Program (PME) a heat exchanger with utilizing residual heat as a preheater for the use of water consumption for bathing, washing, and so on.
Design Models of Equipment Vapor Compression Refrigeration Cycle To Support Practicum Heat Engine And Fluid Engineering Mikraj, Hadimi; Rahmadi, Joni; Marlina, Dina; Rusadi, Rusadi; Karyadi, Edi
Vokasi: Jurnal Publikasi Ilmiah Vol. 19 No. 1 (2024): Vokasi: Jurnal Publikasi Ilmiah
Publisher : Politeknik Negeri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/jv.v19i1.781

Abstract

The learning method acts as an educational facility that functions to convey learning material to achieve learning goals. It takes creativity from lecturers and those responsible for the teaching and learning process, especially practicum. The results of the study entitled Design Models of Equipment Vapor Compression Refrigeration Cycle To Support Practicum Heat Engine And Fluid Engineering Subject produce a model of a practicum tool that can be used to carry out some practicum contents for refrigeration engines. This model of Vapor Compression Refrigeration Cycle can do several practicums in a refrigeration machine, namely looking for COP from a refrigeration machine, installing a refrigeration machine, incubating a refrigeration machine, pumping down a refrigeration machine and filling in a refrigerating machine. Keywords: Model tools, Vapor Compression, Practicum
Co-Authors Adani AS Afridalianti Afridalianti Agus Rohermanto, Agus Ahmad Faizal Asy'ari, Farida Azmal Azmal Azmal, Azmal Dina Marlina, Dina Dwi Harjono Edi Karyadi Eko Julianto Erlangga Atidhira Hadijaya Farida Farida Fuazen Hasanudin Hastiadi Hasan Hendro Priyatman, Hendro Indra Lukman Ismail Yusuf, Ismail Iswanda, Dovian Jaini Jaini M. Jusri Suganda Putra Maratina, Dina Mikraj, Hadimi Nurhaidah Nurhaidah Rusadi, Rusadi Sutrisno Sutrisno Sutrisno, Sutrisno Tri Pratomo Tuti Puji Lestari Widodo Widodo