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All Journal Journal of Engineering and Applied Technology Sepakat : Sesi Pengabdian Kepada Masyarakat
Gunawan Gunawan
Balikpapan University
Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences

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An experimental study on the performance of air conditioning system using R-134a And MC-134 refrigerant in D8R caterpillar units Gunawan Gunawan; Puji Saksono; Jainal Abidin; Chalermpol Plengsa-ard
Journal of Engineering and Applied Technology Vol 3, No 1 (2022): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v3i1.48823

Abstract

Refrigerant is a crucial cooling component for the refrigeration cycle. In heavy equipment, the cooling system still relies on the R-134a unit with many weaknesses, including global warming effects and other air conditioning system problems. An alternative substitute for R-134a has been found, i.e., a hydrocarbon refrigerant or MC-134. This product has several advantages compared to R-134a, especially its environmentally friendly aspect. It does not contribute to the damage of the ozone layer and is completed with good physical characteristics and thermodynamic properties. Overall, it has better performance than R-134a, proven on the Nissan Evalia unit. This study aimed at testing heavy equipment, especially the D8R caterpillar unit because limited studies discuss heavy equipment regarding its MC-134performance. This research was carried out at the Petrosea Ltd workshop. The research was done through experimental methods. The first stage was retrofitting R-134a with MC-134 on the D8R caterpillar unit. The data collection was conducted ten times with an interval of 3 minutes. The second step WAS using MC-134 and taking the same data as the first step. The compressor work on the MC-134 increased by 145.96% compared to R-134a. The result of the study showed that the heat energy released by the condenser using MC-134 increased by 157.833%. 161.625% for the refrigeration effect, and 5.21% of The COP value, respectively, compared to R-134a.
AKSI BERSIH PANTAI SEBAGAI UPAYA PELESTARIAN LINGKUNGAN PESISIR DI PANTAI DUSIT BALIKPAPAN KALIMANTAN TIMUR Siti Norhidayah; Gunawan Gunawan; Siska Ayu Kartika; Era Wahyu Ningsih; Budha Maryanti; Nur Aini; Fransye Joni Pasau
SEPAKAT Sesi Pengabdian pada Masyarakat Vol. 5 No. 2 (2025): SEPAKAT DESEMBER 2025
Publisher : INTERNATIONAL PENELITI EKONOMI, SOSIAL, DAN TEKNOLOGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56371/sepakat.v5i2.567

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan kesadaran masyarakat terhadap pentingnya kebersihan lingkungan pesisir melalui aksi bersih pantai di Pantai Dusit Kota Balikpapan. Metode pelaksanaan dilakukan melalui partisipasi aktif dosen dan mahasiswa Program Studi Teknik Mesin Universitas Balikpapan dengan pendekatan aksi langsung dan edukatif. Hasil kegiatan menunjukkan terjadinya pengurangan sampah pesisir, meningkatnya kepedulian lingkungan peserta, serta terbangunnya kesadaran kolektif masyarakat sekitar. Kegiatan ini diharapkan dapat menjadi model pengabdian berkelanjutan dalam pelestarian lingkungan pesisir.
Co-Authors Budha Maryanti Chalermpol Plengsa-ard Era Wahyu Ningsih Fransye Joni Pasau Jainal Abidin Nur Aini Puji Saksono Siska Ayu Kartika Siti Norhidayah