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JAMETECH

JAMETECH
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Published by Politeknik Negeri Bali

ISSN : 26559145 EISSN : 26848201 DOI : 10.31940/jametech

Core Subject : Science, Engineering,

Automotive Engineering Energy Engineering Mechanical Engineering

The scope of the journal encompasses research into broad aspects in Mechanical Engineering, Green Technology, and associated fields including Mechanics, Materials, Manufacturing and Production, Design and Construction, Automotive, Refrigeration Heating Ventilating and Air Conditioning (RHVAC), Mechanical and Plumbing for Buildings, Sustainable Energy Management and Technology, New, and Renewable Energy Technologies.

Arjuna Subject : Teknik (semua kategori) - Teknik Mesin

Articles 7 Documents

Search results for , issue "Vol. 3 No. 1 (2022): March 2022" : 7 Documents clear

Meningkatkan kinerja gardu distribusi SK76 Penyulang Sukasada dalam menangani overblast menggunakan simulasi perangkat lunak ETAP I Putu Sutawinaya; Anak Agung Ngurah Made Narottama; I Gusti Ngurah Ade Pujana
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 1 (2022): March 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Distribution transformer serves to transform electrical energy from the power source to the customer. In the transformation process there are power losses which of course can reduce the efficiency of the transformer. The relatively high loading on the transformer will cause an increase in power losses, so its efficiency will decrease. The Sukasada Feeder SK76 Distribution Substation with a transformer capacity of 100 kVA supplies 253 customers with an installed power of 273 kVA. Based on the measurements that have been made during the peak load time (WBP), the average percentage of the transformer loading is 99.57% with an efficiency of 98.02%. Referring to the Circular of the Directors of PT. PLN (Persero) No.: 0017.E/DIR/2014, then the transformer has been declared overload (overblast) because the load has exceeded 80%. Efforts that can be made to improve the performance of the transformer include: upgrading the capacity of the transformer, adding additional substations or through network reconfiguration. Based on the trials that have been carried out by the author through the simulation of the ETAP 16.0 software, several results were obtained. If an uprating is carried out with a transformer capacity of 160 kVA, the percentage of loading decreases to around 61.46% with efficiency increasing to about 98.77%. If additional substations are added with a capacity of 50 kVA as well as network reconfiguration by transferring some of the load to another Distribution Substation (SK63), the result is that the percentage of loading is reduced to around 63.17% and efficiency increases to about 98.46%. The simulation results that have been carried out show that this condition has met the provisions/regulations set by PT. PLN (Persero).

Perancangan mekanisme rel torch plasma cutting 1 (satu) Axis I Wayan Suma Wibawa; I Komang Kantun; I Ketut Suherman; Risa Nurin Baiti; I Wayan Suirya
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 1 (2022): March 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Plasma cutting is a method of cutting metal, especially steel, with relatively low cost and effectiveness, with satisfactory results. Where in the cut, it is enough to need a plasma cutting machine/inverter that is quite affordable, widely available in the market, and simple tools, an air compressor (no special oxygen/gas needed as in gas/oxygen and acetylene/LPG cutting), a power source, the material being cut and the cutting process can be carried out. How to use plasma cutting is relatively easy, namely by setting the machine and then directing the plasma torch to the cutting plane as needed by maintaining a stable movement and height. However, when we make repeated cuts, our concentration and physical strength will automatically decrease, so we need a tool that can help us direct/adjust the plasma torch, which is called a plasma cutting mechanism. After paying attention to these needs, a plasma cutting mechanism was designed with a working space/cutting length of 1200 mm, with a tool size of 1400 mm x 300mm x 200 mm length, width and height, estimated cost of Rp. 3,050,000,-, with a cutting speed setting of 100 mm/minute to 1000 mm/minute, a cutting height of 0 to 10 mm with an angle of 0 degree to 90 degree.

Analisis modifikasi sistem kopling otomatis ke sistem kopling manual terhadap akselerasi sepeda motor Supra-X tahun 2014 I Nyoman Sutarna; I Nengah Ludra Antara; I Ketut Suherman; I Ketut Adi
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 1 (2022): March 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Acceleration is the change in speed in a certain unit of time. The method applied in this research is the experimental method. The purpose of the analysis of the modification of the automatic clutch system to the manual clutch system on motorcycle acceleration is to determine the results of the modification of the automatic clutch system to the manual clutch system on acceleration. The results of the first test showed that the average acceleration in the automatic clutch system was 101.05 m/s2, and the second an average acceleration was 101.14 m/s2, so the average acceleration was 101.095 m/s2. When using the manual clutch system, the first test results obtained an average acceleration of 77.87 m/s2, the second obtained an average acceleration of 78.51, so the average acceleration was 78.19 m/s2. So the average acceleration using the automatic clutch system is 101,095 m/s2, while those using the manual clutch system are 78.19 m/s2. There was a very significant difference of 101.095 m/s2 - 78.19 m/s2 = 22,905 or 22.65%. This means the use of the manual clutch system accelerates faster than the automatic clutch system.

Simulasi sistem pompa suplai air bersih dengan kontrol berbasiskan PLC Sudirman; I Nyoman Gede Baliarta; I Ketut Suherman; Achmad Wibolo
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 1 (2022): March 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

This paper discusses the simulation of control of a clean water pump system based on PLC. This simulation tool uses 3 tanks: tower tank, consumption tank and ground tank. The PLC used is the Zelio SR3PACKBD Smart Relay. The input is a stainless steel rod sensor placed in the tower tank and ground tank. The output is 2 pump motors and a solenoid valve. PLC program used Ladder diagram with ZELIO SOFT 2 programs. The test results show satisfactory results and the equipment required is very simple compared to conventional controls.

Motorcycle wheel rim press tool design I Nengah Ludra Antara; I Nyoman Sutarna; Ida Bagus Puspa Indra; I Nyoman Gunung
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 1 (2022): March 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

In motor vehicles, especially motorcycles, sometimes there are a lot of problems with the wheel rim in the event of an accident, or hit by a pothole that causes the wheel rim to be dented. In this case, we design a motorcycle wheel rim press tool as shown in Figure 2.1. The things that must be considered for a tool design in material selection are hardness, strength, fragility. The types of materials used are carbon steel, alloy steel, hollow steel, U iron, axle iron, angle iron, plate iron. In general, there are several grades of iron, including JIS G3101 SS400, ASTMA 36; BS 4360; DIN 17 100JIS G 3101; JIS 3106; SNI 07 2054, which has a different maximum tensile strength or stress by using formulas, for example the calculation of shafts, levers, weld strength and selection of hydraulic jacks. Supporting instruments in the process of working on the wheel rim press tool are machine tools and other measuring tools. To obtain truly satisfactory results from a tool, we are required to observe and look for alternatives and as carefully as possible in order to achieve a result that meets the standard. The tool must have high efficiency, easy to operate, and uphold work safety. Based on the results of the design and testing of the design of this motorcycle wheel rim press tool, it is more efficient, fast, and precise when compared to the tools owned by David Jaya Motor's workshop. The time required is faster according to the test results, which is between 25 minutes to 40 minutes with different wheel rim damage cases, while manually at the David Jaya Motor workshop, from observing field test results it takes a minimum of 90 minutes.

Penentuan ukuran pipa kapiler dengan program aplikasi CapSel Versi 1.0 pada AC trainer unit jenis ekspansi langsung dengan R-410A I Dewa Made Susila; I Wayan Adi Subagia; I Made Rasta
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 1 (2022): March 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

The use of air conditioning system currently mostly uses the vapor compression cycle. One such air conditioning machine is a direct expansion type AC. In this type of air conditioner, the air is directly cooled by the refrigerant. Cold air is flowed through the air duct to be entered into the room to be cooled. The refrigerant used is R-410A which does not contain chlorine so it does not cause depletion of the ozone layer because it has an ODP = 0. This direct expansion unit trainer uses an expansion device in the form of a capillary tube and an external equalizer type TXV. To determine the size of the capillary tube on the trainer unit, the direct expansion type uses the CapSel version 1.0 application program. By using the input data for refrigerant type R-134A, refrigeration capacity 2,637.6 Watt (9000 BTU/hour), evaporation temperature 5 °C condensation temperature 47 °C, and return gas temperature 12 °C, the recommended capillary pipe size data is obtained, namely the length of the pipe. capillary 1.47 m with an inner diameter of 2.50 mm. The test was carried out by varying the velocity of the air leaving the airways at high speed (22.3 ft/s) and at low speed (7.9 ft/s). The refrigerant temperature and pressure data are measured at 4 measurement points and the measurement of the electric current entering the system. After processing the data and entering it into the Coolpack application program, the average COP and EER in the low speed position produce a higher price than the high speed position.

Kajian termodinamik kinerja AC split: studi kasus pada bangunan pendidikan dengan menerapkan program komputer I Wayan Adi Subagia; I Dewa Made Susila; Ketut Bangse; I Nyoman Suamir
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 1 (2022): March 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

This paper presents a thermodynamic study on energy performance of a split AC system with R-32 for the application of educational buildings at the Bali State Polytechnic. The study was conducted using a standalone computer program U-CoolS V.1.12 which was developed on the EES (Engineering Equation Solver) V11,334 program. A thermodynamic model was developed and validated using data from the technical specifications of various types of split AC. Thermodynamic studies were carried out based on variations in ambient temperature in the Bali Region. The effect of two operating parameters of a split AC system, namely the condensing temperature in the condenser and the evaporation temperature of the refrigerant in the evaporator, on the compressor performance and energy performance of the AC system is simulated. Thermodynamic simulation results show the strong influence of condensing temperature and evaporation temperature on compressor performance and overall energy performance of the split AC system. It was found that for 1 °C increase in condensing temperature, the compressor power increased quite significantly around 2.1%, the cooling capacity of the split AC system decreased by 1.8%, COP and EER also decreased by 3.9%. Meanwhile, for 1 °C increase in evaporation temperature, it was found an increase in compressor power consumption of around 0.31%, an increase in cooling capacity of 4.4% and an increase in COP and EER of 4.1%. The results of this thermodynamic study also show that the split AC system performance using R-32 refrigerant has a very good COP range from 3.27 to 5.95 with the implication that R-32 refrigerant has the potential to be a refrigerant for a split AC system.

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Contact Name
I Nyoman Suamir

Contact Email
nyomansuamir@pnb.ac.id

Phone
+62361-701981

Journal Mail Official
jametech@pnb.ac.id

Editorial Address
Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali, Badung, Bali, Indonesia

Location
Kab. badung,

Bali

INDONESIA

Abstract

Abstract

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name I Nyoman Suamir

Contact Email nyomansuamir@pnb.ac.id

Phone +62361-701981

Journal Mail Official jametech@pnb.ac.id

Editorial Address Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali, Badung, Bali, Indonesia

Location Kab. badung, Bali INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
I Nyoman Suamir

Contact Email
nyomansuamir@pnb.ac.id

Phone
+62361-701981

Journal Mail Official
jametech@pnb.ac.id

Editorial Address
Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali, Badung, Bali, Indonesia

Location
Kab. badung,

Bali

INDONESIA