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Jurnal Teknologi dan Vokasi
Published by Institut Teknologi Padang
ISSN : 29858690     EISSN : 29643694     DOI : https://doi.org/10.21063/jtv
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering
Jurnal Teknologi dan Vokasi (JTV) mengakomodasi pemaparan informasi ilmiah dalam bentuk artikel penelitian, artikel teknis, artikel konseptual, ataupun artikel laporan studi kasus yang sesuai dengan fokus dan ruang lingkup jurnal ini. Ruang lingkup JTV mencakup semua masalah di bidang Teknologi Rekayasa Listrik, Rekayasa Kontruksi Bangunan, dan Teknik Mesin, tapi tidak terbatas pada topik: Sistem tenaga listrik, Mesin-mesin listrik dan sistem konversi energi, Mikrokontroler dan arduino, Teknologi informasi dan sistem kontrol, telekomunikasi, Teknik elektromedik Transportasi Jalan dan Jembatan Manufaktur Material Energi Baru dan Terbarukan Go Green
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 141 Documents
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PERANCANGAN DAN PEMBUATAN ALAT PEMOTONG SERAT NANAS MENGGUNAKAN SISTEM PNEUMATIK Eka Putra, Ismet; Hendra, Boy
Jurnal Teknologi dan Vokasi Vol 1 No 1 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.1.75-80

Abstract

Making a tool that can help cut natural fiber composite raw materials (pineapple fiber) automatically, can increase efficiency and make it easier to cut, both in terms of speed, power, amount of production, to the safety factor of the cutting machine. The results of the test show that using a pneumatic system pineapple fiber cutting tool can cut fibers quickly to meet the need for pineapple fiber as a raw material for composite materials and also avoid situations where when cutting fibers manually you will feel tired because performance decreases and it greatly affects safety level that can be dangerous in the cutting process. The difference in pressure applied to the system varies by 2, 3, 4, 5 bar with varying cutting results, namely 61, 100, 113, and 150 cuts every 60 seconds. This pneumatic system pineapple fiber cutter is capable of cutting in 0.41 seconds with an air pressure of 5 bar.
POMPA HIDRAM (POMPA AIR TANPA PENGGERAK ENERGI MEKANIK) Anwar, Irwan; Wardianto, Dedi; Afdal, Afdal
Jurnal Teknologi dan Vokasi Vol 1 No 1 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.1.81-85

Abstract

Hydram pump is the machine that conversion potential energy (PE = mgh) of water to kinetic energy (KE = ½ mv2) in intake pipe become water hammer in casing of hydram pump. That has capability to raised water from the pump with vertical elevation H2 = + 50 m to 500 m. It needs the minimal elevation + 1 m, the minimal debit 7 litres/minute and it depends on diameter and pump type. The principal of its construction has length of intake pipe L = 5 to 10 x H1 (vertical fall).
EVALUASI KINERJA SISTEM PENDINGIN KOMPRESI UAP VRF DENGAN SIKLUS INJEKSI Rachman, Arfidian; Yuana Dewi, Arfita; Effendi, Asnal; Nesti, Lisa
Jurnal Teknologi dan Vokasi Vol 1 No 1 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.1.86-92

Abstract

As a result of a decrease in the mass flow rate at the inlet section of a variable refrigerant flow (VRF) cooling system, the refrigerant flow system performs poorly. To increase efficiency the steam injection cycle method is used. The effects of steam injection are theoretically explored in this study over a wide range of medium pressures and ambient temperatures, and the findings are supported by experimental data. Compressor heating capacity, input power, coefficient of performance (COP), and isentropic efficiency are all affected by pressure. At low ambient temperatures, the increase in COP by steam injection is remarkable. In this study, the performance of the cooling system with the injection cycle was evaluated, the system with this injection cycle resulted in an increase in cooling capacity of 3.26% and an energy efficiency ratio (EER) of 2.32%.
ANALISIS PENGARUH PROFIL SUDUH TERHADAP DAYA TURBIN VORTEX Marfizal, Marfizal; Sufiyanto, Sufiyanto; Wardianto, Dedi
Jurnal Teknologi dan Vokasi Vol 1 No 2 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.2.1-11

Abstract

A vortex turbine is a turbine that operates by utilizing a vortex flow as a drive for turbine blades which then the turbine shaft is connected to a generator to convert shaft mechanical energy into the form of electrical energy. In this study a test will be carried out on a vortex turbine with a head of 1 m, a flow rate of 0.12 m3/s. In the testing process, 3 types of blades will be used, namely straight blades, curved blades and finned curved blades. After testing, it can be concluded that the highest power is found in the curved blade of 959.08 Watt and then the finned curved blade is 714.38 Watt, while the lowest power is found in the straight blade type of 582.48 Watt. The resulting rotation can be seen in the graph below. The highest rotation is found in the finned curved blade of 540.00 rpm and the next is the curved blade of 517.67 rpm, while the lowest rotation is found in the straight blade type of 510.67 rpm. For the efficiency of each metal blade, it can be seen that curved blades are still the highest followed by curved blades with finned blades, the lowest being straight blades with salty blade efficiencies of 98%, 73% and 59%
ANALISIS KEBUTUHAN UAP PADA STASIUN STERILIZER DI PABRIK KELAPA SAWIT Edi Siswanto, Jatmiko; A, Topan
Jurnal Teknologi dan Vokasi Vol 1 No 2 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.2.12-22

Abstract

In palm oil processing, one of the processes is boiling using a sterilizer machine, where the sterilizer is a steam vessel used to boil FFB with steam pressure in accordance with the standard working pressure that is permitted, as well as in boiling palm oil marks in a sterilizer that has factors or variables. in boiling namely Boiling Capacity (Q), Boiling Pressure (Peak pressure), Inlet Water Temperature (T.in) and Boiling Time (t). To find out the optimality in the boiling process, research was carried out and data collection on sterilizer operations in the palm oil mill industry obtained data or variables in boiling. From the calculation of the research data, it was found that the working pressure of boiling would affect the steam requirement in the process where at the Peak 1 pressure it required 240,414 kcal/hour of steam, Peak 2 required 705,819 kcal/hour of steam and at Peak 3 it required 859,375 kcal/hour of steam. Optimal Boiling is the largest capacity produced according to the working pressure in the boiling result. The optimal pressure is seen at the greatest pressure of 2.7 bar with the shortest boiling time of 58 minutes. Which produces 9 boils per shift with a capacity of 207 tons and at a pressure of 2.4 Bar it produces 8 boils per shift with a capacity of 84 tons and for a pressure of 1.7 bar it produces 7 boils per shift. with a capacity of 161 tons.
PENGARUH PENAMBAHAN ABU ARANG TEMPURUNG KELAPA TERHADAP KUAT TEKAN PAVING BLOCK A, Arman; Mulyati, Mulyati; Wardi, Syafri; Roza, Angelalia; Sonia Putra, Didi
Jurnal Teknologi dan Vokasi Vol 1 No 2 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.2.23-30

Abstract

Paving Block is a building material made from a mixture of cement, sand and water. Paving blocks are widely used in the construction sector, such as sidewalks, highways, parking lots, parks and others. Ease of installation, inexpensive maintenance and fulfilling aspects of beauty make paving blocks more preferred. Along with the many developments such as houses, parks, roads in the midst of today's society, this has resulted in the need for paving blocks increasing. Because the hardening process takes quite a long time, therefore, to speed up hardening, this study added coconut shell ash. In this study using a ratio of 1 Pc: 3 Ps and the addition of coconut shell ash with variations of 0%, 2.5%, 5% and 7.5% by weight of cement. The average compressive strength value of paving block plans is a minimum of 12.5 MPa and a maximum of 15 MPa for grade C which is used for pedestrians and other uses, with rectangular specimens measuring 20 cm x 10 cm x 6 cm of 24 pieces with age 28 days testing for compressive strength and water absorption test. Based on the test results, the normal compressive strength of paving blocks was 13 MPa, the addition of 2.5% coconut shell ash was 13.5 MPa, 5% shell ash was 14.5 MPa, the addition of 7.5% coconut shell ash was 12. .83 MPa. Based on the test results, the normal Paving Block water absorption value was 7.8%, 2.5% shell ash was 7.22%, the addition of 5% shell ash was 6.3%, 7.5% shell ash was 4.89%. Thus, it can be stated that the effect of Coconut Shell Ash can increase compressive strength and reduce water absorption. The highest compressive strength and lowest water absorption were obtained at the addition of 5% for the compressive strength and the lowest water absorption was obtained at the addition of 4.89%.
SISTEM MONITORING SUHU DAN INTENSITAS CAHAYA PADA SOLAR PANEL 3 WP BERBASIS IoT (INTERNET OF THINGS) Alfith, Alfith; Premadi, Aswir; Bachtiar, Antonov; Al Habib, Sayyid
Jurnal Teknologi dan Vokasi Vol 1 No 2 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.2.31-38

Abstract

According to the solar insolation map, Indonesia has a daily intensity of solar radiation of 4.8 kW/m per day. The potential of solar radiation is highly exploitable and is the most promising source of energy in the future, the energy generated by the sun is unlimited compared to the increasingly depleting fossil energy sources. Many energy experts are already competing to find new discoveries about environmentally friendly alternative energy sources, one of which is solar cells, although efficiency today still requires further consideration. In this study, the authors used the Wemos module with the ESP 8266 type that can be integrated with the Wi-Fi system as its controller, as well as using a temperature sensor with the DHT11 type to detect the temperature in the room and use the LDR sensor as a light intensity detector or as a lux which can be monitored remotely using an internet connection. Light intensity and temperature monitoring results are obtained with light intensity values and temperature values using the application of the highest value = 1005 lux, the lowest value is = 435 lux. For the highest value of the temperature of = 320 Celsius, for the lowest of = 240 Celsius, in sunlight conditions at peak, the resulting value is the light intensity of 1005 lux and the temperature value of 32 ° Celsius which indicates that the weather conditions are very hot.
PENGARUH PENAMBAHAN EPOKSI PRIMER TERHADAP LAJU KOROSI BAJA KARBON RENDAH YANG DIRENDAM DALAM LARUTAN KAPORIT (KALSIUM HIPOKLORIT) YANG BERSIRKULASI Eka Putra, Ismet; Wardianto, Dedi; Aulia, Joni
Jurnal Teknologi dan Vokasi Vol 1 No 2 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.2.39-45

Abstract

Chlorine solution,  is usually used as a water disinfectant, which can cause metal corrosion. Circulating solution can erode the protective layer thereby accelerating corrosion. Epoxy primer provides the best rust prevention and adhesion properties compared to other types of primer. This research was conducted using 27 specimens in 3 vessels in each vessel there were 9 specimens with soaking low carbon steel without treatment, which was coated with paint and coated epoxy primary. The volume of 1 liter of chlorine solution for 1 vessel. The results of this study indicate that the primary epoxy coated can hamper corrosion well. Low carbon steel weight reduction that without treatment or which is not coated much larger than in low carbon steel coated with paint and coated epoxy primary even though the paint coated is still unable to withstand the corrosion rate well. The lowest corrosion rate with the provision of primary epoxy in a 60-day immersion time with an average value of 0,002879872mpy and the highest corrosion rate with without treatment or which is not coated with a 15-day pronounce time with the average value 0,009015251 mpy.
PENGARUH PENAMBAHAN LIMBAH BATU BATA MERAH BUKITTINGGI SEBAGAI FILLER PADA CAMPURAN AC-WC DENGAN PENGUJIAN MARSHALL Misbah, Misbah; Pratiwi JF, Anggun; Arman, Arman; Mulyati, Mulyati; Rofifah, Jihan
Jurnal Teknologi dan Vokasi Vol 1 No 2 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.2.46-52

Abstract

The existence of highways is needed in the development of an area. The problems that are often encountered in the construction of highways are excessive vehicle loads than permitted, less than optimal road maintenance and the influence of asphalt mixture factors, so that roads are often found to be damaged before the design life is reached. To improve the quality of road pavement construction, it is necessary to conduct research on mixed innovations used or adding other additives to the pavement construction mixture, so that better mixed quality is produced. One of the types of research that can be done is to use the method of making test objects by conducting experiments in the laboratory by analyzing the effect of adding Bukittinggi red brick waste as a filler to the AC-WC mixture with the Marshall test. From the results of the research with the Marshall test that has been carried out, with the title "The Effect of Adding Bukittinggi  Red Brick Waste as Filler to the AC-WC mixture with the Marshall test, the results obtained on the addition of 1% variation of red brick waste filler resulted in a property value, namely the value: stability , MQ, VMA, VFA meet the requirements of the 2018 revision 2 Highways specifications, whereas the addition of a 2% variation of red brick waste filler results in the property values, namely the Flow and VIM values, not meeting the requirements of the 2018 revision 2 Highways specifications, this indicates increased deformation in pavement layer under load. So, the 2% addition variation is not recommended, the use of red brick waste as filler added to the AC-WC mixture can only be used up to 1%.
KAJIAN PASIR SILIKA SEBAGAI AGREGAT HALUS PADA CAMPURAN ASPHALT CONCRETE WEARING COURSE (AC – WC) BERDASARKAN UJI MARSHALL Nofrianto, Hendri; Dwi Astika, Septiana
Jurnal Teknologi dan Vokasi Vol 1 No 2 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.2.53-66

Abstract

Aggregate is the main component in the formation of asphalt mixtures, in which the weight of aggregate ranges from 90%-95% of the total weight of the asphalt mixture. Usually, the aggregate used is obtained directly from nature and is a non-renewable material so that its availability continues to decrease. One of the alternative aggregates utilized is silica sand which is a waste originating from Karang Putih Hill, Padang City, West Sumatra, it is hoped that this silica sand waste can be used as an alternative aggregate in asphalt mixtures on flexible pavements. This research aims to analyze the characteristics of asphalt mixtures using silica sand as fine aggregate and further review the effect of water on the durability of the mixture through immersion tests with variations of immersion of 0 hours, 24 hours, 48 hours, 72 hours and 96 hours based on marshall testing. The results of this study indicate that silica sand can be used as an alternative aggregate in road pavements, this can be concluded based on the values of the marshall parameters of silica sand within the specifications used, the use of silica sand in the Asphalt Concrete - Wearing Course (AC-WC) mixture has an optimum asphalt content value of 5.7%. Durability of asphalt mixtures with silica sand seen from the results of the immersion test decreases as the immersion duration increases, the Residual Strength Index (IKS) value meets the requirements of Bina Marga 2018 Revision 2 specifications up to a 24-hour immersion duration with a value of 93.94%.

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