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All Journal Journal of Mechanical Science and Engineering MEDIA BINA ILMIAH Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) SRIWIJAYA JOURNAL OF ENVIRONMENT
Riman Sipahutar
Lecturer Of Magister Program Mechanical Engineering, Sriwijaya University
Agriculture, Biological Sciences & Forestry Arts Humanities Education Energy Engineering Environmental Science Mechanical Engineering Public Health Social Sciences

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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
THE EFFECT OF PROCESS PARAMETERS ON LIQUID SMOKE PRODUCTION FROM PALM OIL PYROLYSIS Herlin Sumarna; Riman Sipahutar; Irwin Bizzy
MEDIA BINA ILMIAH Vol 15, No 10: Mei 2021
Publisher : BINA PATRIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33758/mbi.v15i10.1076

Abstract

Palm kernel shells are waste from Crude Palm Oil (CPO) factories that have not been optimally utilized, so further processing is carried out to increase their economic value by the pyrolysis process. The pyrolysis process is carried out using a reactor combined with a spiral stirrer, and a condensation process that uses a refrigeration system to control the coolant temperature at 18oC. The purpose of this study was to determine the effect of particle size, temperature and residence time on the pyrolysis of palm shells sourced from the Musi Banyuasin area of South Sumatra. The pyrolysis experiments were carried out at pyrolysis temperatures of 300oC, 325oC, and 350oC and the palm shell particle sizes of -3+5 mesh and -5+7 mesh for residence time varied for 3 hours, 4 hours, and 5 hours. The maximum liquid smoke yield obtained is 28.6% at 350oC for palm shell particles -5+7 mesh and a residence time of 5 hours. In terms of temperature influence, the lowest smoke yield is 19% of the total biomass at 300oC. For the residence time variation, the maximum liquid smoke product was 28.6% of the total biomass at a size of -5+7 mesh for 5 hours.
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;
Co-Authors Amir Arifin Amir Arifin Diah K. Pratiwi Herlin Sumarna Irwin Bizzy Maemonah, Maemonah Muhammad Faizal Muhammad Haviz Muhammad Taufik Toha Niharman Niharman Oki Alfernando Pratiwi, Diah K. Rendy Wiseta