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<![CDATA[KAJIAN EKSPERIMENTAL UNJUK KERJA KOLEKTOR UNTUK MESIN PENDINGIN SIKLUS ADSORPSI YANG DIGERAKKAN ENERGI MATAHARI ]]>
<![CDATA[Purba, Jhon Sufriadi]]>;
<![CDATA[Suhada, Khairul]]>;
<![CDATA[Wijaya, Darma]]>
<![CDATA[ MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 5 No 2 (2019): November 2019 ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM) ]]>
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<![CDATA[The rapid development of the refrigeration system, along with the rapid advancement of technology. Adsorption refrigeration cycle is currently being developed, especially in developing countries. Adsorption refrigeration cycle is very environmentally friendly. One component of this is the generator cooling machine. Type of generator used is a flat plate. The area of adsorber is 0.25 m2 with a slab thickness is 1 mm. In this adsorber filled with activated carbon as much as 8 kg. The temperature of the water will decrease with decreasing temperature refrigerant in the evaporator. On the afternoon of the desorption process occurs adsorber receives heat from the lights and the refrigerant will flow into the condenser and melt in the evaporator, at night adsorber is cooled by the outside environment resulting in the adsorption process, the refrigerant will evaporate from the evaporator into the condenser and adsorber will be absorbed. The results of this study are vacuum adsorber temperature to obtain the absorption refrigerant refrigerant methanol at 200 0C and the temperature thermostat produces 123.43 0C adsorber temperature and methanol as refrigerant absorbs 6.25 ml/kg. Keywords: Adsorption, desorption, generator, activated carbon, refrigeration]]>
<![CDATA[UNJUK KERJA SOLARCOOKER TYPE PARABOLIC DENGAN DIAMETER 100 CM TINGGI 50 CM ]]>
<![CDATA[JHON SUFRIADI PURBA]]>
<![CDATA[ JURNAL ILMIAH MAKSITEK Vol 5 No 2 (2020): JURNAL ILMIAH MAKSITEK ]]>
Publisher : <![CDATA[LP2MTBM MAKARIOZ ]]>
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<![CDATA[Has been done research on "The work of Solar cooker Type Parabolic with diameter 100 cm height 50 cm" This researchaims to know the performance of a Solar cooker with the experimental method of dish collector put in place exposed to directsunlight with water mass in containers 1 liter in 3 days observation. Observations were carried out with an interval of 10minutes from 10.00 WIB to 16.00 WIB. The research results for the 1liter mass reaches the highest temperature of 106 0C atthe average radiation intensity of the sun 492 W/m2. Besarya solar radiation intensity affects the thermal conversion systemto the focus field of the pan as a cooking container, the higher the radiation intensity then the higher the temperature of thepot cooker.]]>
<![CDATA[Analisis Pengaruh Mekanisme Katub Terhadap Daya Pada Motor Bakar 4 Tak Dengan Bahan Bakar Bensin Mesin 1500 CC ]]>
<![CDATA[J HT Saragi]]>;
<![CDATA[J S Purba]]>
<![CDATA[ Jurnal MESIL (Mesin Elektro Sipil) Vol. 2 No. 2 (2021): Jurnal MESIL (Mesin Elektro Sipil) ]]>
Publisher : <![CDATA[Cered Indonesia Institute ]]>
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DOI: 10.53695/jm.v2i2.556
<![CDATA[The increasing need for fuel and the increasingly soaring prices have resulted in many automotive manufacturers creating vehicles that consume more fuel efficiently with ideal engine performance. Torque and power are measures that describe the performance output of an internal combustion motor. These two parameters describe two different performance elements, depending on the use of the vehicle. The selection factor for the type of valve mechanism is based on its technological capability in activating engine power, increasing engine efficiency, reducing exhaust emissions, effectiveness and efficiency in reducing fuel consumption. Focusing on reducing fuel consumption, the most important thing is how there is a good system for engine control, on the engine itself, assistive devices and a good overall transmission system, so one of the valve mechanisms that promises to improve fuel efficiency is effective. Also improvements to exhaust emissions are the CVTC (Continuously Variable Timing Control) valve mechanism. The purpose of this study was to determine the effectiveness of the CVTC valve mechanism on engine power. CVTC has the ability to effectively control the intake camshaft to provide the most optimal valve timing for engine conditions, improve torque at all speed levels, and save fuel.]]>
<![CDATA[Pemanfaatan Arus Air untuk Pembangkit Listrik Tenaga Micro Hidro ]]>
<![CDATA[Jandri Fan HT Saragi]]>;
<![CDATA[Jhon Sufriadi Purba]]>
<![CDATA[ ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) Vol. 2 No. 3 (2021): Oktober ]]>
Publisher : <![CDATA[CERED Indonesia Publishing ]]>
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DOI: 10.53695/jas.v2i3.466
<![CDATA[One of the problems being faced in several regions in Indonesia is the source of electrical energy. The demand for electricity from year to year has increased. The development of free energy technology needs to be developed to cover the rapidly increasing demand for electricity. One that can be developed is micro-hydro power plant technology that utilizes water flow as a source of electricity. To make a micro hydro power plant, it is necessary to do research on the available discharge and how much energy and power is generated at that location. The purpose of this community service activity is to help the community find out the potential of river flows in Toba Village, South Siantar District, Pematangsiantar City in its utilization for micro hydro power plants. The method of implementing the activity is Head observation (falling height), river flow velocity, river width, and river flow depth. From the results of observations and measurements of discharge at the service location, it is known that the head (fall height) is 0.5 meters, the river flow speed is 0.74 m/s, the river width is 6.5 meters and the river flow depth is 0.3 meters so that an empirical calculation of the generator discharge is obtained at 1.433 m3/sec., and the power that can be generated is 7.08 kW.]]>
<![CDATA[Kajian Saluran Sungai Akibat Gesekan Limbah pada Aliran Sungai di Bantaran Sungai Kelurahan Toba, Kec. Siantar Selatan ]]>
<![CDATA[Jhon Sufriadi Purba]]>;
<![CDATA[Jandri Fan HT Saragi]]>
<![CDATA[ ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) Vol. 2 No. 3 (2021): Oktober ]]>
Publisher : <![CDATA[CERED Indonesia Publishing ]]>
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DOI: 10.53695/jas.v2i3.473
<![CDATA[River pollution is the entry of various substances and non-biodegradable objects that result in contaminated water and loss of function. Besides being a source of various diseases, water pollution also causes flooding. Protecting the river is the same as maintaining survival in the future. Rivers have been the most important part of human life since ancient times. In human evolution, rivers and lakes played an unimaginable role. Rivers are not only important for animals and birds to live, but are also a major source of drinking water. And their environmental value, economic value, and spiritual value touch everyone in the world. In India, people at one time even worshiped rivers as life-giving gods and goddesses. The reason is that every time we search for life, we look for a drop of water first. Rivers carry water and nutrients to areas around the earth. They play a very important role in the water cycle, acting as drainage channels for surface water. Rivers flow almost 75% of the earth's land surface.]]>
<![CDATA[SOSIALISASI PENTINGNYA PLANKTON PADA BUDIDAYA IKAN DI DANAU TOBA ]]>
<![CDATA[Herna Febrianty Sianipar]]>;
<![CDATA[Tambos Sianturi]]>;
<![CDATA[Jhon Sufriadi Purba]]>
<![CDATA[ Jurnal Abdimas Bina Bangsa Vol. 3 No. 1 (2022): Jurnal Abdimas Bina Bangsa ]]>
Publisher : <![CDATA[LPPM Universitas Bina Bangsa ]]>
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DOI: 10.46306/jabb.v3i1.149
<![CDATA[This service aims to provide information on the introduction of the importance of the existence of plankton in aquaculture in Lake Toba. This service has been carried out in Parapat, Simalungun Regency with the method of extension and material discussion (exposure and question and answer). The results of this dedication show that many residents and owners of floating fish cages do not understand the role of plankton in fish farming, and not many know the types of plankton. From this dedication, it can be seen that the public interest and owners of floating net cages are very high, and they become more aware of the importance of the existence of plankton in aquaculture in Lake Toba]]>
<![CDATA[Sosialisasi Penggunaan Kabel Sesuai SNI Untuk Instalasi Listrik Rumah Tinggal Di Nagori Pagar Pinang Kecamatan Jorlang Hataran Kabupaten Simalungun ]]>
<![CDATA[Tambos August Sianturi]]>;
<![CDATA[Jhon Sufriadi Purba]]>;
<![CDATA[Winfrontstein Naibaho]]>
<![CDATA[ TRIDARMA: Pengabdian Kepada Masyarakat (PkM) Vol. 4 No. 2 (2021): TRIDARMA: Pengabdian Kepada Masyarakat (PkM) ]]>
Publisher : <![CDATA[Institute of Computer Science (IOCS) ]]>
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DOI: 10.35335/abdimas.v4i2.1547
<![CDATA[Energi Listrik adalah energi yang dibangkitkan dari generator kemudian disalurkan melalui Transmisi dan Gardu induk, kemudian disalurkan melalui jaringan Distribusi dan sampai ke konsumen rumah tinggal perkantoran, maupun industri. Tegangan yang di distribuskan sampai ke rumah tangga dengan tegangan yang diterima berkisar 220 Volt, dengan instalasi rumah tangga yang terpasangan beberapa peralatan rumah tangga. Instalasi listrik rumah tinggal yang baik terdiri dari sakelar dan stop kontak yang terhubung ke peralatan listrik. Instalasi listrik rumah tangga terdiri dari KWH meter, MCB, Sakelar peralatan rumah tangga (lampu, pompa) dan Stop Kontak.]]>
<![CDATA[ANALISA PERFORMANSI ENGINE SOHC PADA MOBIL DAIHATSU TARUNA TIPE CSX ]]>
<![CDATA[W Naibaho]]>;
<![CDATA[S Sitompul]]>;
<![CDATA[J S Purba]]>
<![CDATA[ Jurnal MESIL (Mesin Elektro Sipil) Vol. 2 No. 2 (2021): Jurnal MESIL (Mesin Elektro Sipil) ]]>
Publisher : <![CDATA[Cered Indonesia Institute ]]>
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DOI: 10.53695/jm.v2i2.748
<![CDATA[To determine the characteristics and capabilities of the machine, a series of tests were carried out using the SOHC system. In this test, several parameters can be shown, namely; torque, effective shaft power, average pressure, specific fuel consumption.The research was carried out at engine shaft rotation of 1200 rpm to 4000 rpm with 6000 rpm as a benchmark for loading on gasoline engine performance measurements were made on fuel consumption, load, rotation and flow rate of each with a measuring instrument, while the testing equipment used was a gasoline motor. Daihatsu Taruna 1500 cc. Torque as a function of rotation of the Daihatsu Taruna Type CSX engine has a higher torque. The engine output power as a function of the shaft rotation The Daihatsu Taruna Type CSX engine has a larger shaft power. The engine provides driving performance at high rpm and is also fuel efficient. Effective engine power as a shaft rotation The Daihatsu Taruna Type CSX engine has an effective engine power. The average effective pressure between the Daihatsu Taruna Type CSX engine and the EFI (Electronic Fuel Injection) fuel supply system. These results indicate that the Daihatsu Taruna engine is more powerful at high engine speed with maximum torque and remains efficient in fuel consumption.]]>
<![CDATA[Sosialisasi Teknik Pengelasan di SMK Samudera Indonesia Medan ]]>
<![CDATA[Jandri Fan HT Saragi]]>;
<![CDATA[Tambos August Sianturi]]>;
<![CDATA[Jhon Sufriadi Purba]]>;
<![CDATA[Goldberd Harmuda Duva Sinaga]]>
<![CDATA[ ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) Vol. 3 No. 2 (2022): Juni ]]>
Publisher : <![CDATA[CERED Indonesia Publishing ]]>
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DOI: 10.53695/jas.v3i2.640
<![CDATA[The purpose of this PkM is to provide welding competency skills to SMK Samudera Indonesia Medan students as a provision to enter the job field or for entrepreneurship for SMK and help the productive process of SMKs that lack funding and practicum facilities. The method used to solve the problems that have been formulated, we need a method that must be followed in order to be able to do a good solution, here is the solution method, namely a survey in SMK to get data for PkM as needed, formulate training materials, make a schedule for the implementation of training related to time, arrange instructors who will provide training, make a design evaluation of activities, The implementation of welding training activities was followed by students. The results of the PkM implementation are as follows: Welding skills that can equip vocational students to enter the world of work are being able to operate a welding machine correctly and be able to connect plates using welding. The responses from vocational students with training assistance from the UHKBPNP Mechanical Engineering Study Program are as follows: they are happy because they have received welding skills which they have not done optimally and the teachers hope that next year they can continue with other programs.]]>
<![CDATA[Analisis Thermal Terhadap Putaran Fan (Rpm) Pada Mesin Pengering Kakao Kapasitas 2 Kg Menggunakan Panel Surya ]]>
<![CDATA[Ferby Dial Sugianto Sinaga]]>;
<![CDATA[Jhon Sufriadi Purba]]>;
<![CDATA[Winfrontstein Naibaho]]>
<![CDATA[ Jurnal Teknik Mesin Vol 15 No 2 (2022): Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Politeknik Negeri Padang ]]>
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DOI: 10.30630/jtm.15.2.956
<![CDATA[Cocoa (Theobroma cacao L) is a plant originating from South America. Indonesia has two types of cocoa grown, namely noble cocoa (edel) and bulk cocoa, for better quality cocoa is bulk cocoa. The part of cocoa that is used is the seeds that have been dried and then processed into cocoa powder. Cocoa beans that have been harvested are fermented so that they can be sold by cocoa through testing can be seen using tables and graphs in the development of the test every hour. The heat transfer in this test is conduction and convection. The results of the first test using a variation of 6 heater elements obtained data from 2000gram wet cocoa to 1100gram dry cocoa. This test got the highest temperature of 39.50C for 11 hours. The second test of variations with 6 heater elements and an additional fan got the highest temperature of 41.50C for 10 hours with cocoa after testing 1150gram. The second test found cocoa with the best level of AA because there were 84 dry beans in 100gram, the color was dry brown and the drying time was faster than the traditional method, such as farmers usually requiring 5 to 7 days of drying.]]>
