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Sprocket : Journal of Mechanical Engineering

mechanical
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Published by Universitas HKBP Nommensen

ISSN : - EISSN : 26858916 DOI : https://doi.org/10.36655/sproket.v1i1

Automotive Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

SPROCKET Journal of Mechanical Engineering (SJoME) adalah jurnal ilmiah yang berisi tentang publikasi hasil karya penelitian, perancangan dan kajian teori di bidang ilmu teknik mesin dan permesinan, meliputi konversi energi, manufakturing, material dan perancangan desain produk. SJoME diterbitkan oleh Program Studi Teknik Mesin Fakultas Teknik, Universitas HKBP Nommensen, Medan Indonesia. SJoME terbit 2 (dua) kali dalam setahun, yaitu pada bulan Februari dan Agustus.

Arjuna Subject : Teknik (semua kategori) - Teknik Mesin

Articles 99 Documents

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Analisa Laju Korosi dan Kekerasan Pada Stainless Steel 316 L Dalam Larutan 10 % NaCl Dengan Variasi Waktu Perendaman Arga Jeremia Sinaga; Charles Manurung
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 2 (2020): Edisi Februari 2020
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Corrosion is an electrochemical reaction between metals and the environment that causes corrosion and decreases the quality of metals. Steel is a metal material that is widely applied in the industrial world. Stainless steel is stainless steel that is resistant to corrosion because it has an alloying element of at least 18% chrome and 8% nickel. To find out the superiority of stainless steel as a construction material, research on local corrosion of stainless steel needs to be done. For this reason, research on corrosion is carried out by using a 10% NaCl salt solution by varying the immersion time of stainless steel in corrosive media. From the research results it is known that the type of corrosion that occurs in specimens is the type of uniform corrosion. Likewise with the value of violence will decrease if the stainless steel is soaked longer.

Laju Korosi Pada Baja Karbon Sedang Akibat Proses Pencelupan Pada Larutan Asam Sulfat (H2SO4) dan Asam Klorida (HCl) dengan Waktu Bervariasi Miduk Tampubolon; Roy Ganda Gultom; Lestina Siagian; Partahi Lumbangaol; Charles Manurung
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 1 (2020): Edisi Agustus 2020
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

An experiment has been conducted to determine corrosion rate of medium carbon stell with sulfuric acid solution, Aquades 90,2% + H2SO4 9,8% and hydrochloric acid solution, Aquades 96,8% + HCl 3,2%. By using weight loss method, if medium carbon steel dipped into sulfuric acid solution then the corrosion rate is faster than it dipped into hydrochloric solution. If medium carbon steel dipped in a long time than the corrosion rate slowing down.

Analisa Kekuatan Bahan Komposit Yang Diperkuat Serat Bambu Menggunakan Resin Polyester Dengan Memvariasikan Susunan Serat Secara Acak Dan Lurus Memanjang Rokki Manurung; Sutan Simanjuntak; Jesayas Sembiring; Richard A M Napitupulu; Suriady Sihombing
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 1 (2020): Edisi Agustus 2020
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Composites are materials which are mixed with one or more different and heterogeneous reinforcement. Matrix materials can generally be polymers, ceramics and metals. The matrix in the composite serves to distribute the load into all reinforcing material. Matrix properties are usually ductile. The reinforcing material in the composite has the role of holding the load received by the composite material. The nature of the reinforcing material is usually rigid and tough. Strengthening materials commonly used so far are carbon fiber, glass fiber, ceramics. The use of natural fibers as a type of fiber that has advantages began to be applied as a reinforcing material in polymer composites. This study seeks to see the effect of the use of bamboo natural fibers in polyester resin matrix on the strength of polymer composites with random and straight lengthwise fiber variations. From the tensile test results it can be seen that bamboo fibers can increase the strength of polymer composites made from polyester resin and the position of the longitudinal fibers gives a significantly more strength increase than random fibers.

Perbandingan Performansi 4 Variasi Siklus Kompresi Uap 2 Tingkat Siwan Ediamanta Perangin-angin; Himsar Ambarita; Waldemar Naibaho; Parulian Siagian; Marhiras Sitanggang; Libianko Sianturi
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 1 (2020): Edisi Agustus 2020
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Keberadaan Pengkondisan Udara (AC) tidak terlepas dari aspek kehidupan sehari-hari. Pengkondisian Udara memanfaatkan prinsip termodinamika siklus kompresi uap. COP merupakan parameter untuk melihat kinerja dari mesin pendingin tersebut. Dalam penelitian ini, salah satu cara untuk meningkatkan COP dari mesin Pendingin adalah memodifikasi siklus 1 tingkat menjadi siklus 2 tingkat. Karya inimengkaji perbandingan model siklus kompresi uap 2 tingkat dengan beberapa variasi. Perbandingan ini menggunakan sofware ASPEN PLUS V10 untuk melihat performansi dari setiap varian. Untuk fluida kerja (Refrigeran) yang digunakan adalah R-32. Dari hasil simulasi Varian no III menunjukkan nilai COP yang lebih tinggi dari pada varian lainnya.

Analisa Pipa Heat Exchanger (Cooling Tube) Bervariasi Pada Turbine Guide Bearing Pembangkit Listrik Tenaga Air Siguragura Tambos Sianturi
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 2 (2021): Edisi Februari 2021
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

A heat exchanger is a medium used to produce heat transfer from one fluid to another. Heat Exchanger can be used to raise the temperature or as a heater (regenerator) or lower the temperature or as a coolant (recuperator) depending on the view of heat transfer that occurs. Heat exchangers have been widely used in industries such as the chemical industry, paper industry, power plants, and other industries. In the example, each machine unit uses a heat exchanger media (especially rotary type machines) to keep the bearing temperature in normal temperature even though the unit is operated continuously or continuously. This study will analyze the temperature drop that occurs when the length of the heat exchanger pipe is added to the turbine guide bearing of PLTA Siguragura. From the research results, the maximum temperature on the guide bearing cooling tube reaches 47.3 [° C], the overall heat transfer coefficient on the guide bearing cooling tube is 98.87 [W / m²ºC], ∆Tmin on the guide bearing cooling tube installed (with 2 layers) is 14.1 [° C] and ∆Tmin which can be achieved with a cross-sectional area of 5.73 [m²] is 6.63 [° C]

Pengaruh Pengoperasian Wide-Body Aircraft Terhadap Kelancaran Arus Lalu Lintas Penerbangan di Makassar Air Traffic Service Center Daniel Rumani; Hadi Prayitno; Intan Rizka Subandi
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 1 (2020): Edisi Agustus 2020
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

This study aims to obtain a description of whether there is an influence between the movement of wide-body aircraft both departure and arrival on flight delays as a measure of the smooth flow of flight traffic at the Makassar Air Traffic Service Center. The research concludes that there is a positive relationship between the operation of wide-body aircraft and flight delays of 0.870. The positive correlation indicates that the more wide-body aircraft operations, the flight delay will increase, which if there is an increase in flight delays, the smooth flow of flight traffic will decrease. The coefficient of determination is 75%, which means that the effect of the operation of wide-body aircraft on flight delays is 75% and the rest is determined by other factors not included in the research section. The equation obtained from the regression test is Y = -5,679 + 1,872 X. So, if the operation of wide-body aircraft increases by 1, the flight delay will increase by 1,872 at a constant of -5,679.

Pengaruh Pemenuhan Slot Time Terhadap Target Take-Off Time di Perum LPPNPI Cabang Utama Jakarta Air Traffic Service Center Daniel Rumani; Zonar Anjab Rabbani; Hadi Prayitno
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 1 (2020): Edisi Agustus 2020
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

This research was conducted at the Jakarta Air Traffic Service Center (JATSC) starting from March 2020 to July 2020 using the quantitative associative correlation method. The research population was all departing aircraft at Soekarno-Hatta International Airport using various runways and taxiways and aprons. The samples used were all aircraft departing from Soekarno-Hatta International Airport and navigation services were provided by the Jakarta Air Traffic Service Center (JATSC) in three, namely from November 2019 to January 2020 and using cluster (area) sampling techniques. The data collection technique used is a documentation study containing data on the fulfillment of Target Take Off Time (TTOT) and data on each aircraft movement required for research (such as aircraft identification, Estimate Off Block Time, taxitime, etc.). Furthermore, the data analysis technique use disparametric statistics in the form of data assumption tests followed by relationship analysis tests.

Kajian Jarak Aman Antara Arrival Traffic dan Departure Traffic Pada Unit Aerodrome Control Tower di Perum LPPNPI Kantor Cabang Pontianak Daniel Rumani; Zinat Tamami; Endang Sugih Arti; Pangsa Rizkina Aswia
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 1 (2020): Edisi Agustus 2020
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Supadio International Airport is an airport that serves various types of aircraft (Boeing, Airbus, ATR, Hawk, CN259), and does not have a rapid exit taxiway, in its guidance, Perum LPPNPI Pontianak Branch Office enforces rules for Boeing and Airbus-type arrival traffic for backtrack at the end of the runway, but this rule does not apply to aircraft with other types such as ATR and Cessna. This of course creates a time difference to clear the runway for arrival traffic of the Airbus and Boeing types. This study aims to obtain a safe distance between arrival traffic and departure traffic at the Perum LPPNPI Pontianak Branch Office by applying the calculation of The Brazilian Air Navigation Management Center (CGNA) Runway Capacity Calculation by adjusting the current airport conditions. From the research results, it is found that the value of the safe distance between arrival traffic and departure traffic by considering the aircraft classification can produce a more optimal safe distance.

Perbandingan Performansi Sistem ORC Dengan Varian R-216CA, R-112a, R-141b dan n-Pentane Menggunakan Aspen HYSYS Siwan Ediamanta Perangin-angin; Sindak Hutauruk
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 2 (2021): Edisi Februari 2021
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

One of the generation systems that are widely used in various power generation industries is the Organic Rankine Cycle. This cycle has the advantage of a low evaporation point compared to the ordinary steam turbine cycle. The use of refrigerants is the key to the ORC system. Refrigerant is a fluid with quite unique characteristics and many types. This study discusses the use of various types of refrigerants used in the ORC system, namely R-216CA, R-112a, R-141b and n-pentane. By using the Aspen Hysys luna device, we can compare the performance of each Refrigerant Variant of the ORC system. With the same input parameters in each variant, namely for the incoming refrigerant temperature is 600C with a pressure of 450 Kpa, the pump exit pressure is 4000 Kpa, the results are obtained from the Pump Work, Q Condenser, Q Boiler and the resulting turbine power. The result is that the ORC system with refrigerant n-Pantene has a high value for Pump Work, Q Condenser, Q Boiler and Turbine Power produced, but when compared to performance, the System with Refrigerant with R-112a has a higher efficiency value when assessed from its performance.

Pengamatan Atas Daerah Interface Pada Cladding Material Stainless Steel Terhadap Baja Karbon Rendah Secara Metalografi dan Uji Keras Yohanes Hutahaean; Sahat Mauli Lubis; Charles Manurung; Salomo Simanjuntak; Yetty R Saragi
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 2 (2021): Edisi Februari 2021
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Low carbon steel metal is a type of steel that has poor corrosion resistance. For that it is necessary to protect against corrosion through a coating process. In this case the coating is carried out using solid metal and is known as cladding. In this cladding process using another metal as a coating medium, namely stainless steel, the specimen will be given additional deformation from the outside in the form of pressure and the heating process is carried out above the recrystallization temperature (950oC) then cooled slowly in free air. The heating process of the specimens was carried out with three temperature variations, namely 750oC, 850oC and 950oC with a holding time of 60 minutes, from the research results obtained that the specimens and the highest temperature, 950 oC, had better metal bonds compared to specimens at temperatures of 750 and 850oC with hardness values. average 227.96 VHN.

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Dr. Richard A.M. Napitupulu, ST. MT

Contact Email
journalmechanical@uhn.ac.id

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+6281226670831

Journal Mail Official
parulian.nommensen@gmail.com

Editorial Address
Program Studi Teknik Mesin Fakultas Teknik Universitas HKBP Nommmensen Jalan Sutomo No. 4a, Medan 20234 Indonesia

Location
Kota medan,

Sumatera utara

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Dr. Richard A.M. Napitupulu, ST. MT

Contact Email journalmechanical@uhn.ac.id

Phone +6281226670831

Journal Mail Official parulian.nommensen@gmail.com

Editorial Address Program Studi Teknik Mesin Fakultas Teknik Universitas HKBP Nommmensen Jalan Sutomo No. 4a, Medan 20234 Indonesia

Location Kota medan, Sumatera utara INDONESIA

Abstract

Abstract

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Abstract

Contact Name
Dr. Richard A.M. Napitupulu, ST. MT

Contact Email
journalmechanical@uhn.ac.id

Phone
+6281226670831

Journal Mail Official
parulian.nommensen@gmail.com

Editorial Address
Program Studi Teknik Mesin Fakultas Teknik Universitas HKBP Nommmensen Jalan Sutomo No. 4a, Medan 20234 Indonesia

Location
Kota medan,

Sumatera utara

INDONESIA