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All Journal Journal of Mechanical Science and Engineering AUSTENIT Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Indonesian Journal of Engineering and Science (IJES) SRIWIJAYA JOURNAL OF ENVIRONMENT Jurnal Pelita Sriwijaya
Riman Sipahutar
Lecturer Of Magister Program Mechanical Engineering, Sriwijaya University
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Other

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 1 
Analysis Of A Compared Temperature Using Capillary Tube Different Measurement Length At Room 3 X 4 M2 Helping AC Portable Rendy Wiseta; Riman Sipahutar; Muhammad Faizal
Journal of Mechanical Science and Engineering Vol 2, No 2 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (269.856 KB)

Abstract

At this time along with the times a lot of problems that occur in this world like the Earth's warming temperatures globally . Human needs of the air conditioning apparatus has become a staple in our daily lives . There is also a saying that the Air Conditioner ( AC ) has become a mandatory item installed in homes without air conditioning because of the environment around the home became more sultry and hot when we were in the neighborhood . In developments at this time have many types of AC marketed like Split AC , AC Windows , Central air conditioning and so on . A capillary tube expansion device or lowering pressure so cheap that researchers sought to examine the ratio of capillary -sized 33 , 54 , and 76 cm to the temperature of an air conditioner Portable. Results comparative study of the capillary tube length obtained the lowest total heat value is 9086 , 6925 Btu / Hr and the highest is 15144.4875 Btu / Hr .
Analisys of Effect of Outside Air Speed To Air Humidity and Refrigerator Coefficient of Performance Riman Sipahutar; Ferry Irawan
Journal of Mechanical Science and Engineering Vol 3, No 1 (2016): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (254.891 KB)

Abstract

Air conditioning is essential for most humans and are associated with human thermal comfort. At conditioned room where the condition can occur outside air (atmosphere) into the room. Althouht the author was interested in researching this influx of outside air. The aims of this research would be able to examine the effect of the entry of outside air to the room air humidity and refrigerator coefficient of performance. The method used is to perform laboratory-scale experiment with conditioned room with air conditioning or no air conditioning which then incorporate outside air into the room. From this experiment would get experimental result, the result of theoretical calculation, and the result of calculation by using the simulator program. By entering the outside air was obtained that the outside air increases the humidity in the room and affect refrigerator coefficient of performance. The experimental results showed that the average maximum condition occurs at a speed of 1 m/s and at 20 minutes. It can be concluded that the outside air entering the room using the air conditioner would improve indoor air humidity and increase the cooling load means affect refrigerator coefficient of performance. And in a room without air conditioner caused indoor air humidity getting closer to the comfort zone.
THE EFFECT OF STEERING BLADE ANGLES OF HELICAL TURBINE FOR POWER GENERATION IN IRIGATION DAM OF Riman Sipahutar; Niharman Niharman
Journal of Mechanical Science and Engineering Vol 2, No 1 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

The Gorlov vertical axis water turbine is suitable to harness the water flow in the creation of kinetic energy for the irigation dam. The turbine tested in this study was ther Gorlov helical turbine blade with steering angles of 00, 300, 450 and 600 turbine diameter (d) of 0.30 m, height (h) of 0.50 m and the NACA 0020 profile. The testing was conducted on the irigation dam of Seluma Bengkulu. The water flow showed in the velocity (Uair) of  0.85 m / s and a round (n) of 110 rpm. The results were achieved by setting the blades in steering torque coefficient (Ct) of 0.309 are turbine efficiency (ηt) of 28.5% and a power turbine (Pt) of 13.699 Watts.
Evaluasi Termal Vertical Greenery System Tipe Green Facade pada Dinding Bangunan Muhammad Haviz; Muhammad Taufik Toha; Riman Sipahutar; Oki Alfernando
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 10, No 3 (2021): September
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v10i3.296-302

Abstract

Increasing of ambient temperature due to global warming has a direct impact on increasing the room temperature. Heat from surrounding is transferred to building wall and room. By installing the Vertical Greenery System (VGS) on the building wall, it can be an alternative for heat absorber and eco-friendly indicator. The aims of this study are to determine the temperature that can be reduced by VGS type Green Façade (GF) and  achieve the energy consumption reduction because of GF installation.  GF is installed on the building wall, property of Mining Engineering Department, Sriwijaya University, to measure its temperature, then compare it with the  temperature on control wall. The results showed that the GF can reduce the room temperature up to 1,2oC, compared to the control wall and the average is 0,3oC. The decrease in average temperature causes a decrease in energy consumption due to the use of air conditioners by 1.56-1.92%. Keywords: global warming, green facade, thermal evaluation, vertical greenery system
Study of Bio-Coal Briquette as Solid Fuel for Aluminum Smelter Diah K. Pratiwi; Riman Sipahutar; Amir Arifin
Sriwijaya Journal of Environment Vol 2, No 3 (2017): Low Land
Publisher : Program Pascasarjana Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (395.614 KB) | DOI: 10.22135/sje.2017.2.3.99-101

Abstract

Research on alternative energy today based on issues of global warming and greenhouse effects. The use of coal briquettes from low-calorie coal derived from mines in the province of South Sumatera originally destined for the food industry is less desirable because it emits black and smelly smoke, is difficult to turn on, and it is difficult to shut down quickly. So the thought arises to use this coal briquettes for the manufacturing industry and metal casting. In a previous study, the manufacture of mixed briquettes between low calorie coal (lignite) and biomass was more environmentally friendly due to low sulfur content. Therefore, in this study, a study was conducted to find the best biomass species to be mixed with lignite to bio-coal with the highest carbon content criteria and lowest sulfur content. The results showed that the mixture type between coconut shell and lignite reached the optimum condition with carbon content of 57.923% and the lowest sulfur was 0.259% in the mixture ratio of 9 : 1. The combustion temperature reaches 1500 K at furnace efficiency of 48%.Keywords: bio-coal briquettes; lignite. coconut shell; enthalpy difference; carbon and sulfur content; flame temperature;
PENYULUHAN PEMBUATAN KOPRA KEPADA IBU-IBU PKK KELURAHAN KARANGJAYA KECAMATAN GANDUS PALEMBANG Pratiwi, Diah Kusuma; Gunawan, Gunawan; Arifin, Amir; Eka Utami, Nurhabibah Paramitha; Prakoso, Akbar Teguh; Saputra, M. A. Ade; Kaprawi, Kaprawi; Chandra, Hendri; Ellyanie, Ellyanie; Sipahutar, Riman
Jurnal Lentera Nusantara Vol 3 No 1 (2024): Jurnal Pelita Sriwijaya: in progress
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/jps.v3i1.135

Abstract

Indonesia adalah salah satu negara penghasil kelapa terbesar di dunia. Kelapa merupakan bahan baku pembuatan minyak yang dipergunakan untuk berbagai keperluan. Kelapa diolah menjadi kopra yang bertujuan untuk mengurangi kandungan uap air dan menambah ringan, dan meningkatkan kandungan minyak didalamnya.Salah satu daerah di Palembang yang banyak terdapat kelapa adalah Kelurahan Karang Jaya Kecamatan Gandus. Penyuluhan cara mengolah kelapa dilakukan kepada ibu-ibu PKK dan penduduk dengan cara ceramah, diskusi, dan pemutaran video-video. Kegiatan ini telah berhasil dengan baik yang ditunjukkan oleh antusiasme peserta penyuluhan untuk belajar mengolah kelapa menjadi kopra dan nilai hasil evaluasi yang cukup signifikan.
SOSIALISASI PENGECORAN ALUMINIUM SKRAP SEDERHANA DALAM UPAYA PEMANFAATAN LIMBAH LOGAM DAN PEMBERDAYAAN MASYARAKAT Utami, Nurhabibah Paramitha Eka; Chandra, Hendri; Marwani, Marwani; Pratiwi, Diah Kusuma; Ellyanie, Ellyanie; Puspitasari, Dewi; Astuti, Astuti; Sipahutar, Riman; Gustini, Gustini; Gunawan, Gunawan; Utama Putra, Risky
Jurnal Lentera Nusantara Vol 4 No 1 (2025): Jurnal Pelita Sriwijaya
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/jps.v4i1.183

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memberdayakan masyarakat pra-sejahtera di kawasan Gandus, Palembang, melalui pelatihan dan sosialisasi pengecoran aluminium skrap sederhana sebagai upaya pemanfaatan limbah logam menjadi produk bernilai jual. Permasalahan yang dihadapi masyarakat setempat antara lain terbatasnya lapangan pekerjaan, rendahnya keterampilan teknis, serta belum optimalnya pemanfaatan limbah logam yang selama ini hanya dikumpulkan atau dijual dengan harga murah. Metode pelaksanaan kegiatan meliputi survei lapangan, pemberian materi teori, pembuatan tungku pengecoran sederhana, serta praktik langsung pengecoran aluminium skrap. Untuk mengukur efektivitas kegiatan, dilakukan pretest dan posttest terhadap peserta, yang menunjukkan peningkatan signifikan dalam pemahaman peserta terkait konsep dasar pengecoran, nilai ekonomis aluminium, dan keselamatan kerja. Hasil kuesioner juga menunjukkan bahwa 78,57% peserta menyatakan kegiatan ini sangat diperlukan dan materi yang disampaikan mudah dipahami. Dengan demikian, kegiatan ini memberikan kontribusi nyata dalam peningkatan keterampilan dan pemberdayaan masyarakat berbasis pemanfaatan limbah logam secara produktif.
LIQUID SMOKE PRODUCTION FROM PALM KERNEL SHELL PYROLYSIS: COMPARING COLD AIR AND CONVENTIONAL CONDENSATION METHODS Sipahutar, Riman; Bizzy, Irwin; Hidayati, Baiti
Indonesian Journal of Engineering and Science Vol. 6 No. 2 (2025): Table of Contents
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/ijes.v6i2.186

Abstract

Gas condensation is one of the problems in the liquid smoke production process. Uncondensed gas will have an impact on the liquid smoke produced and air pollution. Here, several methods are applied to determine the percentage level of liquid smoke produced by the gas condensation process. The condensation method uses conventional normal water, gas condensation using cold water, and gas condensation using cold air. The raw materials used are oil palm shells with a size of -4+5 mesh, a pyrolysis temperature of 300-4000C, and a liquid smoke production process for 300 minutes. Based on the test results, gas condensation occurs optimally in the cold air method, with the results of 22% liquid smoke, 64% charcoal, and 14% non-condensed gas. Compared with the condensation of the standard water method, the condensation method of cold air is superior to 36.36% for liquid smoke to minimize air pollution by up to 48%. The results of this study indicate that temperature and fluid effect the effectiveness of the gas condensation process, thereby increasing the yield of liquid smoke and reducing air pollution during the liquid smoke production process.
STUDY OF EXHAUST GAS RESIDUAL HEAT CONVERSION HRSG PLTGU KERAMASAN TO ELECTRICAL ENERGY WITH GENERATOR THERMOELECTRIC TECHNOLOGY Firmansah, Hari; Bizzy, Irwin; Mataram, Agung; Sipahutar, Riman
AUSTENIT Vol. 15 No. 2 (2023): AUSTENIT: October 2023
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v15i2.6745

Abstract

The Heat Recovery Steam Generator (HRSG) is a combination of a Gas Power Plant (PLTG) and a Steam Power Plant (PLTU), this plant utilizes exhaust gas from the PLTG to produce steam as the working fluid in the PLTU. The residual heat from the heating process at the HRSG is channeled into the chimney, and the remaining heat from the exhaust gas can be converted into electrical energy with the Thermoelectric Generator (TEG) module. This research was carried out by installing the TEG module in series on the surface of the HRSG chimney wall, using laboratory scale measurements. The heat source uses a heater with a total power of 2,000 W. The research results show that the TEG module can convert the residual heat energy of the exhaust gas from the HRSG chimney into electrical energy. Four TEG modules mounted on the chimney surface can generate a voltage of 0.83 V and a maximum power of 2.79 mW. These results indicate that the TEG module is an opportunity to convert heat energy into electrical energy for further development.
ANALYSIS OF PARALLEL COUPLING OF CHLOR-ALKALI AND ALKALINE WATER ELECTROLYSIS PROCESS WITH COMBINE CATHODE FLUID CIRCULATION Pratama, Andri; Sipahutar, Riman; Bizzy, Irwin
AUSTENIT Vol. 15 No. 2 (2023): AUSTENIT: October 2023
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v15i2.7517

Abstract

Hydrogen is almost ideal fuel in reducing emissions without CO, CO2, SOX or NOX. Hydrogen can be used through the combustion or Fuel Cell processes so that emissions are low. One of the hydrogen production processes is through electrolysis, both Chlor-Alkali (CA) and Alkaline Water Electrolysis (AWE). Both processes contained a NaOH solution in the CA and catalyst results in AWE. In this test, a combination of CA and AWE processes will be carried out in the fluid circulation at the cathode of two processes. From this study it was found that there was an increase of 11 percent by weight of gas when CA and AWE cathode fluid were circulated in parallel compared to the CA and AWE processes respectively.
Co-Authors Agung Mataram Amir Arifin Amir Arifin Astuti - Dewi Puspitasari Diah K. Pratiwi Diah Kusuma Pratiwi Eka Utami, Nurhabibah Paramitha Ellyanie Ellyanie Firmansah, Hari Gunawan Gunawan Gustini, Gustini Hendri Chandra Herlin Sumarna HIDAYATI, BAITI Irwin Bizzy Irwin Bizzy Kaprawi Kaprawi Maemonah, Maemonah Marwani Marwani, Marwani Muhammad Faizal Muhammad Haviz Muhammad Taufik Toha Niharman Niharman Oki Alfernando Prakoso, Akbar Teguh Pratiwi, Diah K. Raden Mohamad Herdian Bhakti Rendy Wiseta Saputra, M. A. Ade Utama Putra, Risky Utami, Nurhabibah Paramitha Eka