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All Journal Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Surya Teknika
Irpansyah Siregar
Program Studi Teknik Mesin, Fakultas Teknik, Universitas Amir Hamzah
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Karakteristik Unjuk Kerja 2 Pompa Sentrifugal Dengan Susunan Seri Sebagai Turbin Pat Sudirman Lubis; Irpansyah Siregar; Ahmad Marabdi Siregar
Rekayasa Material, Manufaktur dan Energi Vol 3, No 2: September 2020
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v3i2.5270

Abstract

The pump is a device used to move fluid from one place to another through a media pipe or channel. The energy in the fluid is produced from the impeller which converts the kinetic energy (velocity) of the liquid into potential (dynamic) energy. Besides being used to move fluid (fluid) at this time the pump can also be used as a turbine by changing the working principle of the pump by giving a drop of water at an altitude to rotate the impeller on the pump so that the pump can operate upside down or called a pump as turbine), in this study the impeller on the pump as a turbine is driven by a water flow or water pressure that is large enough, the water flow is sourced from two centrifugal pumps with a series arrangement that functions as a driving force or fluid distributor which is assumed to be a high water fall or head. The use of centrifugal pumps with a series arrangement is so as to produce a large head to get a high water fall or a maximum head for turning a pump as a turbine. This study uses an experimental method that is using two centrifugal pumps as a fluid distributor and one pump that is used as a turbine and uses a variation of 5 watt and 10 watt light bulb. From the calculation of the suction pump and pump as a turbine without using a light bulb pump speed namely 920.5 rpm and the specific speed of the turbine produced is 76.61 rpm. by using a 5 watt light bulb load the pump rotation speed is 553 rpm and the specific turbine speed produced is 44.24 rpm, using a 10 watt light bulb load the pump rotation speed is 335 rpm and the specific turbine speed produced is 26.8 rpm. The greater the value of the pump head, the resulting water discharge will be smaller and vice versa, the size and size of the pump head obtained is also influenced by the presence of load on theturbine.
Studi Eksperimental Kekuatan Struktur Atap Berongga Berbahan Komposit Serat Alam Sudirman Lubis; Munawar A Siregar; Edi Sarman Hasibuan; Irpansyah Siregar
Jurnal Surya Teknika Vol 9 No 2 (2022): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v9i2.4306

Abstract

Komposit adalah suatu bahan yang terbentuk dari gabungan dua bahan atau lebih sehingga bahan komposit yang dihasilkan memiliki sifat dan karakteristik mekanik yang berbeda dengan bahan penyusunnya, serat yang digunakan dalam komposit matrik dibedakan menjadi dua yaitu serat alam dan serat sintetik. Sedangkan padi dan nanas merupakan tumbuhan yang banyak dijumpai di seluruh nusantara khususnya indonesia, sehingga hasil alam seperti beras dan nanas di indonesia sangat melimpah. Sekam padi merupakan bahan alternatif yang dapat digunakan dalam pembuatan material komposit, demikian pula serat daun nanas yang akan digunakan sebagai bahan atap merupakan cara yang baik untuk mengurangi evolusi limbah alam seperti sekam padi dan serat daun nanas. . Pada penelitian ini, penulis akan melakukan percobaan kekuatan mesin berbasis komposit menggunakan sekam padi dan serat daun nanas khususnya pada pembuatan atap hollow. Dari uji tarik yang telah dilakukan pada komposit serat sekam padi dan serat daun nanas dengan perbandingan komposisi resin 70% : 30% sekam padi dan daun nanas, 80% : 20% dan 90% : 10%. Terlihat komposisi bahan 90% : 10% mendapatkan nilai lebih tinggi yaitu 101,4 kgf/mm2, sedangkan untuk uji perbandingan perbandingan komposisi resin adalah 70% : 30% sekam padi dan serat daun nanas 80% : 20% dan 90% : 10%. Terlihat bahwa komposisi material 90% : 10% mendapatkan nilai yang lebih tinggi yaitu 1246,26 kgf/mm2.
Co-Authors Ahmad Marabdi Siregar Edi Sarman Hasibuan Munawar A Siregar Sudirman Lubis