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All Journal Techno: Jurnal Penelitian FLYWHEEL : Jurnal Teknik Mesin Untirta Jurnal Teknik
Hendri Sulistyo
Universitas Pendidikan Indonesia
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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INVESTIGASI EKSPERIMENTAL RETROFIT REFRIGERAN PADA ALAT PRAKTIK REFRIGERATOR DENGAN REFRIGERAN PRODUK DOMESTIK YANG RAMAH LINGKUNGAN Mutaufiq Mutaufiq; Hendri Sulistyo; Ega Taqwali Berman; Apri Wiyono
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume V Nomor 2, Oktober 2019
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v1i1.6454

Abstract

Isu tentang kerusakan ozon dan pemanasan global permukaan bumi akibat refrigeran sintetik, mendorong laboratorium Pendidikan yang menggunakan mesin pendingin, mencari alternatif jenis refrigeran yang ramah lingkungan. Retrofit merupakan penggantian refrigeran (bahan habis sebagai fluida kerja) dengan jenis refrigeran yang ramah lingkungan. Penelitian ini bertujuan untuk melakukan eksperimen retrofit refrigeran R-134a pada alat praktikum mesin pendingin jenis refrigerator/kulkas dengan refrigeran natural yang diproduksi oleh perusaan domestik sebagai refrigeran ramah lingkungan. Penelitian dirancang secara eksperimen dengan metode retrofit drop in subtitude. Jenis refrigeran natural yang digunakan adalah Musicool-22 (MC-22). Pengujian diawali dengan mengukur performa mesin pendingin refrigerator yang masih menggunakan refrigeran R-134a, untuk mendapatkan performa awal refrigerator. Kemudian dilakukan reftrofit dengan MC-22 dengan jumlah massa 15% sampai 65% dari massa R-134a. Selanjutnya kinerja refrigerator yang sudah diretrofit menggunakan MC-22 diukur sebagaimana pengukuran kinerja mesin pendingin menggunakan refrigeran R-134a. Hasil pengujian menunjukkan bahwa, performa mesin pendingin refrigerator meningkat pada saat diretrofit MC-22 dengan jumlah massa refrigeran 25% sampai 35% dari massa refrigeran R-134a. Performa terbaik refrigerator diperoleh saat menggunakan MC-22 (m=25g) dengan nilai COP meningkat sampai 10,3% dan suhu evaporator lebih rendah 6 0C dari mesin pendingin refrigerator yang menggunakan refrigeran asalnya (R-134a, m=100g).
Performance Investigation of Cooling Machine Practice Props After Retrofitted by Natural Refrigerants Mutaufiq; Hendri Sulistyo; Kamin Sumardi; Ega Taqwali Berman; Apri Wiyono
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 20 No 2 (2021): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jt.vol20no2.419

Abstract

Resizing the main components of the cooling machine needs to be done after being retrofitted with a new refrigerant. This is done to improve the performance of the cooling engine. In this study, we would like to investigate the effect of adjusting the main components of the cooling machine performance after using new environmentally friendly refrigerants. The experiment was designed on a refrigerator that uses R-134a as a working fluid. The type of hydrocarbon refrigerant used to substitute R-134a is Musicool-22 (MC-22). The cooling load in the evaporator cabin is a salt solution. Testing is done in two stages. In the first stage, the refrigerator operates in its original condition (R-134a with CT1 as the expansion valve). In the second stage, the working fluid R-134a is retrofitted with MC-22 with adjustments to its main components into several variations. Furthermore, the refrigerator performance is measured by comparing the value of the refrigerating effect (RE), the heat of compression, and the refrigerator performance (COP). The test results show that the best refrigerator performance rate is when the refrigerator operates with variation 3 (refrigerant MC-22 with CT2 as the expansion valve), increasing COP values ranging from 0.62% to 2.12%.
SiDal Development (Laboratory Big Data System) in Basic Physics Laboratory Hana Susanti; Cahyo Puji Asmoro; Hendri Sulistyo
TECHNO: JURNAL PENELITIAN Vol 12, No 2 (2023): TECHNO JURNAL PENELITIAN
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v12i2.5797

Abstract

Inventory activities for tools and materials, borrowing tools, free laboratory processes and much more, are part of the Education laboratory services, in its function as a support for the Tri Dharma of Higher Education. These activities when carried out with conventional systems, require a long time with less-than-optimal results. To improve laboratory management services, a device data collection system was developed which is contained in a web-based application, called SiDal (Laboratory Big Data System). SiDal is a subsystem of the laboratory management system at the Basic Physics Laboratory of FPMIPA UPI. The aim of developing SiDal is for laboratory services to be more effective and efficient with optimal results. Users can access tool data, tool catalog, tool status and where to store the tool. To see the success of the system, research was carried out using the Research and Development method. Trials of the application of this system were carried out at the Basic Physics Laboratory of FPMIPA UPI by conducting surveys through questionnaires and interviews. From the results of the questionnaire distributed, 68 student respondents from various generations had accessed SiDal. 98% of respondents agreed that the implementation of SiDal in the Basic Physics Laboratory provided an increase in laboratory management services. The results obtained will serve as an evaluation and further development of the laboratory management system.
Co-Authors Apri Wiyono Asmoro, Cahyo Puji Ega Taqwali Berman Hana Susanti Kamin Sumardi Mutaufiq Mutaufiq Mutaufiq