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All Journal Jurnal Rekayasa Mesin Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Accurate: Journal of Mechanical Engineering and Science Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Markus Markus
Department Of Refrigeration & Air Conditioning, Politeknik Negeri Bandung, Bandung 40559, Indonesia
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Improvement of Laboratory Capacity in SMK Manangga Pratama Tasikmalaya Rizki Muliawan; Markus Markus; A S Margana; Cecep Sunardi; Nur Khakim; E Erham
ABDIMAS: Jurnal Pengabdian Masyarakat Vol. 5 No. 1 (2022): ABDIMAS UMTAS: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Universitas Muhammadiyah Tasikmalaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (529.711 KB) | DOI: 10.35568/abdimas.v5i1.1664

Abstract

SMK Manangga Pratama consists of several majors including Motorcycle Business Engineering (TBSM), Automotive Light Vehicle Engineering (TKRO), and Sofware Engineering (RPL). In major Automotive Light Vehicle Engineering (TKRO), some subjects discuss the Air Conditioning system (automotive AC and split room AC). The problem is the lack of equipment for vacuuming, and charging refrigerants for automotive AC units to be used and empowered as a learning resource. The main cause is the lack of affordable equipment for service, unit maintenance. This of course will be a problem when the students have graduated and need direct application to the Automotive AC system and the room. There are about 110 students from the Automotive Light Vehicle Engineering (TKRO) Department in each batch, with such a large number, it would be better if they were given an additional briefing on these skills. This PkM program has been equipped and provided with equipment and service equipment to be used by students as a training unit in improving their skills. The manufacture of tables and assembly of training units for automotive AC service completeness (charging, pumping, and other tools) will be carried out on the Polban Bandung campus. Instructor trainers in this PkM training program are several teaching staff in the Refrigeration and Air Conditioning Engineering Department, while the unit is a complete unit for automotive air conditioning units and rooms, namely (charging, pumping, and other tools). The implementation of community service activities majoring in refrigeration and air conditioning engineering POLBAN as a form of higher education tri dharma has been completed on October 28-29 at SMK Manangga Pratama. The activity consisted of making practicum tools for strengthening school laboratories, accompanied by providing training for the service and maintenance of air conditioning machines (AC).
Analisis Kinerja Penukar Kalor Tipe Shell and Tube untuk Pendinginan Governor Markus; Yogi Nugroho Bakti
Accurate: Journal of Mechanical Engineering and Science Vol. 1 No. 2 (2020): October 2020
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v1i2.342

Abstract

One of the elements that affect the reliability and service life of a hydraulic pump is the stability level of oil viscosity as a power successor. The stability level of oil viscosity is affected by changes in temperature. The compression and friction process that the oil receives to move the hydraulic pump will increase the oil temperature so that its viscosity level will decrease. To maintain the performance of the hydraulic pump, the oil temperature must be maintained at room temperature. In the case study at PLTA Ir. H. Djuanda, Lurah Kawi Street No.1 Jatiluhur-West Java, to cool the oil, a shell and tube heat exchanger type JPK 13699068 (single tube) is used. This research was conducted to test whether the heat exchanger is still working properly, the parameter is that the cooled oil exit temperature must be close to room temperature. The effectiveness of the heat exchanger will be tested by comparing the test results with the condition of the heat exchanger without impurity factors. The test was carried out by measuring the temperature of the HX intake oil at 44 0C with a discharge of 0.437 kg/s, and the temperature of the HX inlet water at 28 0C with a discharge of 0.498 kg/s. The results showed that, for the coefficient of U between 110 to 350 W/m2 oC with a water impurity factor of 0.0001 m2 oC/W and an oil impurity factor of 0.0002 m2 oC/W, there was a decrease in effectiveness from an average of 74.5% to 73.7%, and there was an increase in oil temperature out of the heat exchanger from an average of 32.07 oC to an average of 32.21 oC.
Desain Sistem Pembangkit Listrik Tenaga Surya Off-Grid untuk Catu Daya Sistem Refrigerasi Andriyanto Setyawan; Tandi Sutandi; Markus Markus
Retii Prosiding Seminar Nasional ReTII ke-13 2018
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This paper discusses the use of solar energy that is easily found in Indonesia due to its geographical location in tropical area. In this research, the solar energy was utilized to supply energy for the operation of refrigeration machine that highly required in Indonesia. This research employed solar panels with a capacity of 200 WP, solar charge controller, battery, and inverter, to supply energy for a mini refrigerator. The average power resulted from the experiment is 106.4 Watt with the average solar irradiation of 352 W/m2. The energy for the charging of the battery is 396 Wh. This is sufficient for supplying the refrigerating machine for 3.3 hours if the machine runs continuously. If the machine has an on/off cycle with the utilization factor of 40%, the energy could run the machine for 8.25 hours.
Metode Praktis Perancangan Panjang Pipa Evaporator pada Mini Freezer Bertemperatur Rendah Menggunakan Refrigeran R404A Kasni Sumeru; Markus Markus; Nanda Fauzan Pratama; Rizki Muliawan; Yudi Prana Hikmat
Jurnal Rekayasa Mesin Vol 18, No 1 (2023): Volume 18, Nomor 1, April 2023
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v18i1.3878

Abstract

Mini freezer yang terdapat di pasaran umumnya memiliki temperatur kabin hanya sampai -20oC. Penelitian ini bertujuan menampilkan metode perhitungan panjang pipa evaporator sehingga dapat mencapai temperatur kabin hingga -40oC dengan menggunakan refrigeran R404A. Refrigeran R404A selain relatif lebih ramah lingkungan dibandingkan dengan R22, juga memiliki temperatur Normal Boiling Point (NBP) lebih rendah dari R22. Kapasitas kompresor yang digunakan adalah 250 W yang khusus dirancang untuk refrigeran R404A. Berdasarkan pengujian didapatkan bahwa temperatur kabin dapat mencapai -40oC setelah 120 menit mesin pendingin dioperasikan. Selama beroperasi, tekanan kerja, yaitu tekanan suction dan discharge kompresor, mini freezer hampir sama dengan hasil perhitungan. Ini artinya metode yang digunakan pada penelitian ini dengan desain dan pengembangan (R&D). Namun untuk mendapatkan freezing time yang lebih singkat masih diperlukan optimasi panjang pipa evaporator masih diperlukan, supaya temperatur kabin -40oC dapat dicapai lebih singkat. Perbedaan hasil perancangan, yaitu: tekanan suction, tekanan discharge dan temperatur discharge, dengan hasil pengujian tidak lebih dari 10%.
Co-Authors A S Margana Andriyanto Setyawan Cecep Sunardi E Erham Kasni Sumeru Muliawan, Rizki Nanda Fauzan Pratama Nur Khakim Tandi Sutandi Yogi Nugroho Bakti Yudi Prana Hikmat