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All Journal JTT (Jurnal Teknologi Terpadu) Journal of Welding Technology Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Jurnal Polimesin
Zulkifli, Zulkifli
Politeknik Negeri Balikpapan
Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Other

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Journal : Jurnal Polimesin

 1 
Perbandingan sampah organik rumah tangga dengan sampah organik pasar terhadap kuantitas biogas Subur Mulyanto; Zulkifli Zulkifli; Elisabeth Milaningrum
Jurnal POLIMESIN Vol 16, No 2 (2018): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v16i2.563

Abstract

Abstrak Penelitian ini bertujuan untuk mengetahui bagaimana cara dan proses pembuatan biogas untuk mendapatkan hasil yaitu gas metana (CH4) secara maksimal dengan menggunakan bahan dari sampah organik makanan rumah tangga dan sampah organik pasar. Jenis penelitian ini adalah eksperimen, dimana penulis melakukan perencanaan, perancangan, pembuatan, dan pengujian secara langsung dilapangan untuk mengetahui hasil dari percobaan tersebut. Proses dalam penelitian menggunakan bahan baku sampah pasar dan sampah organik rumah tangga yang kemudian masing–masing difermentasi selama 12 hari, setelah  dilakukan pengambilan sampel untuk uji nyala dan uji kandungan gas metana yang dihasilkan. Hasil penelitian menunjukan bahwa sampah organik pasar lebih baik digunakan sebagai bahan untuk pembuatan biogas dibandingkan dengan sampah makanan rumah tangga dikarenakan sampah organik pasar tidak memerlukan waktu yang lama untuk terbakar, pada proses pengujian kandungan gas metana sampah organik pasar memiliki kandungan gas metana yang lebih tinggi yaitu 52,8 % dibandingkan dengan sampah organik rumah tangga yang hanya 0,29 %.Kata kunci:  Biogas, Gas metana (CH4), Sampah organik pasar, Sampah organik rumah tangga, fermentasiAbstract This study aims to find out how the way and process of biogas production to obtain the results of methane (CH4) to the maximum by using materials from organic household food waste and organic waste market. This type of research is experimental, where the authors do the planning, design, manufacture, and testing directly in the field to find out the results of the experiment. The process in this study includes the selection of materials divided into 2, namely market waste and household organic waste which then each fermented for 12 days, after sampling for the test flame and test the methane gas content produced. The results showed that the market organic waste is better used as a material for the manufacture of biogas compared with household food waste because the market organic waste does not require a long time to burn, in the process of testing the methane gas content of organic waste market has a higher methane gas content 52.8% compared with household organic waste which is only 0.29%.Keywords: Biogas, Methane (CH4), Organic waste market, Household organic waste, fermentation
Prototipe Turbin Angin Savonius Variasi Extra Layers Dengan Pengujian Real Wind Condition Yudi Kurniawan; Ida Bagus Dharmawan; Zulkifli Zulkifli
Jurnal POLIMESIN Vol 19, No 1 (2021): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v19i1.2053

Abstract

Wind energy is renewable energy that is clean, environmentally friendly and easy to obtain. Balikpapan City is very suitable for applying the Savonius wind turbine because it has a relatively low average wind speed. Savonius wind turbine is a turbine consisting of two concave and convex blades that work based on drag forces. Savonius wind turbine can utilize wind energy at low speed 2 m/s to be converted into electrical energy which can reduce the electrical load in urban areas. This research makes a prototype of the Savonius wind turbine with the addition of variations extra layer on the concave turbine blades. The test method uses a generator that is attached to the turbine shaft and the test is carried out in a multi-storey building area. The results obtained are the Savonius wind turbine prototype capable of producing actual power 0.76 Watt and power coefficient is 0.082. The addition of an extra layer at both tips of the turbine concave blades is proven to be able to improve the performance of the Savonius wind turbine.
Analisa pengaruh perlakuan kimia pada serat terhadap kekuatan impak charpy komposit serat sabut kelapa bermatriks epoxy Zulkifli Zulkifli; Ida Bagus Dharmawan; Wahyu Anhar
Jurnal POLIMESIN Vol 18, No 1 (2020): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i1.1583

Abstract

Penggunaan serat sabut kelapa pada material komposit akan menaikkan nilai komersial dari perkebunan kelapa. Kekuatan komposit berpenguat serat alam dipengaruhi oleh penyebaran serat, interaksi antara serat dengan matriks, bagaimana serat itu diperoleh, ukuran serat, dan bentuk serat. Untuk memperoleh ikatan yang baik antara matriks dan serat dilakuan modifikasi permukaan serat. Alkalisasi pada serat alam adalah metode yang telah digunakan untuk menghasilkan serat berkualitas tinggi. Penelitian ini menganalisis dan mengetahui pengaruh perlakuan kimia pada serat  terhadap kekuatan impak material komposit diperkuat serat sabut kelapa bermatriks epoxy. Adapun tahapan pada penelitian ini yaitu dilakukan perendaman serat sabut kelapa pada larutan NaOH dengan konsentrasi 10%, 15%, dan 20%, selama 2 jam, lalu serat dicuci dengan menggunakan larutan H2O2 dengan konsentrasi 3% selama 1 jam. Adapun hasil dari penelitian ini yaitu perlakuan alkalisasi terhadap komposit serat sabut kelapa mempengaruhi sifat kekuatan impak dari material komposit dengan kekuatan impak dan energi serap material komposit memiliki hubungan terbalik terhadap jumlah konsentrasi larutan alkalinya. Makin tinggi konsentrasi larutan alkalinya yang diberi pada serat akan menyebabkan makin kecilnya energi serap dan kekuatan impak dari material komposit berpenguat serat sabut kelapa.Kata kunci : komposit, serat sabut kelapa, NaOH, H2O2, kekuatan impak Effect of chemical treatment of composite coir fiber with epoxy matrix on the Charpy impact strengthAbstractThe use of coconut fiber in composite materials will increase the commercial value of coconut plantations. The strength of a natural fiber-reinforced composite is influenced by the spread of the fiber, the interaction between the fiber and the matrix, how the fiber is obtained, the size of the fiber, and the shape of the fiber. To obtain a good bond between the matrix and the fiber surface fibers are modified. Alkalization of natural fibers is a method that has been used to produce high-quality fiber. This study analyzes and examines the effect of chemical treatment on fiber on the impact strength of composite materials reinforced with epoxy coconut fiber coir fiber. The stages in this study were first carried out soaking coconut coir fiber in NaOH solution with a concentration of 10%, 15%, and 20%, for 2 hours, then the fiber was washed using H2O2 solution with a concentration of 3% for 1 hour. The results of this study are the alkalization treatment of coconut coir fiber composites affecting the impact strength properties of composite materials where the impact strength and absorption energy of composite materials have an inverse relationship to the amount of alkaline solution concentration. Where the higher the concentration of the alkaline solution given to the fiber will cause the smaller the absorbing energy and the impact strength of the composite fiber-reinforced coconut fiber.
Analisa pengaruh perlakuan alkalisasi dan hydrogen peroksida terhadap kekuatan mekanik komposit serat sabut kelapa bermatriks epoxy Zulkifli Zulkifli; Ida Bagus Dharmawan
Jurnal POLIMESIN Vol 17, No 1 (2019): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v17i1.844

Abstract

Komposit polimer dengan serat alam sangat  ramah lingkungan  karena  mampu  terdegradasi secara alami dan juga harga serat alam pun  lebih  murah  dibandingkan  bahan serat sintetis. Penelitian ini bertujuan untuk mengetahui pengaruh perlakuan NaOH pada serat sabut kelapa terhadap kekuatan mekanik material komposit yang diperkuat serat sabut kelapa. Adapun tahapan pada penelitian ini yaitu (1) perendaman serat sabut kelapa pada larutan NaOH dengan konsentrasi 10%, 15%, dan 20%, selama 2 jam, (2) mencuci serat sabut kelapa yang telah direndam dengan menggunakan larutan H2O2 dengan konsentrasi 3% selama 1 jam, (3) serat sabut kelapa dikeringkan di dalam kamar pada temperature kamar sekitar 300C selama 7 hari, (4) pembuatan material komposit dengan metode press molding, (5) melakukan pengujian tarik sesuai standar ASTM D-638. Hasil dari penilitian ini yaitu pengaruh perlakuan NaOH dengan konsentrasi larutan 15% pada serat sabut kelapa menunjukkan nilai tegangan tarik yang paling optimal yaitu sebesar 23.497 MPa dan nilai regangannya sebesar 3.918% pada material komposit, hal ini disebabkan oleh ikatan interface antara serat dan matrik menjadi lebih kuat sehingga tegangan dapat terjadi secara merata, sebelum terjadi patah pada material komposit. Kata kunci:  komposit, serat sabut kelapa, NaOH, H2O2, kekuatan mekanik. AbstractComposite polymers with natural fibers are very environmentally friendly because they can be degraded naturally and also the price of natural fibers is cheaper than synthetic fiber. This study aims to determine the effect of NaOH treatment on coconut fiber on the mechanical strength of coco fiber reinforced composite materials. The stages in this study are (1) soaking coco fiber in NaOH solution with a concentration of 10%, 15%, and 20%, for 2 hours, (2) washing coconut coir fibers that have been soaked using H2O2 solution with a concentration of 3% for 1 hour, (3) coconut coir fibers are dried in the room at room temperature around 300 C for 7 days, (4) making composite materials using the press molding method, (5) carrying out tensile testing according to ASTM D-638 standard. The results of this research are the effect of NaOH treatment with a concentration of 15% solution on coconut fiber shows the most optimal tensile strength of 23,497 MPa and the strain value is 3,918% in composite materials, this is due to the bonding between fibers and matrices strong so that stress can occur evenly, before a composite material breaks. Keywords: composite, coconut fiber, NaOH, H2O2, tensile strength.
Pengaruh media pendingin terhadap kekerasan dan ketangguhan hasil pengelasan material AISI 1050 pada proses las MAG Azwinur Azwinur; Muhammad Yudi; Zulkifli Zulkifli
Jurnal POLIMESIN Vol 18, No 2 (2020): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i2.1924

Abstract

The temperature of the cooling medium is a substance that serves to determine the speed of the cooling process of the material that has been given heat treatment from the welding results. Cooling is an alternative to improve and improve the mechanical properties of post-welding materials. The selection of the temperature of the cooling medium is very important to get a good connection strength. The purpose of this study was to determine the effect of the cooling media on the hardness and toughness of AISI 1050 material using the MAG welding process. The cooling media which are varied are water, sea water, and air. The welding process used is the welding process MAG (Metal active gas) with CO2 protective gas, the material used type AISI 1050 with mechanical testing hardness and impact test. The results showed that the use of the type of cooling media affects the strength of the welding joint in terms of the value of the hardness and toughness of the material receiving the load. The highest hardness value in the HAZ 1, HAZ 2 and weld metal areas occurs in the use of sea water cooling media where in HAZ 1 is 71, 63, HAZ 2 is 73.5 and weld metal is 70, while the lowest value in the use of air conditioning media where on HAZ 1 of 65.63, HAZ 2 of 63.75 and weld metal of 58.83. The impact toughness test results found that the use of seawater cooling media has the highest toughness value of 1.83 joules / mm², then followed by air media of 1.75 joules / mm², and the lowest is the water use of 1.50 joules / mm² .
Co-Authors Azwinur Azwinur Basri Dahlan Elisabeth Milaningrum Hadi Hermansyah Ida Bagus Dharmawan, Ida Bagus Muhammad Yudi Nurul Fatimah Patria Rahmawati Subur Mulyanto Subur Mulyanto Wahyu Anhar C Putra Yudi Kurniawan