Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Penelitian Pendidikan Fisika
Ngatmin
Politeknik Maritim Negeri Indonesia
Aerospace Engineering Automotive Engineering Education Engineering Industrial & Manufacturing Engineering Mechanical Engineering Physics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Pengembangan Media Pembelajaran Augmented Reality pada Mata Kuliah Fisika Terapan Berdasarkan IMO Modul Course 7.04 Heri Kiswanto; Ngatmin
Jurnal Penelitian Pendidikan Fisika Vol. 9 No. 4 (2024): Edisi November 2024
Publisher : Jurusan Pendidikan Fisika FKIP Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36709/jipfi.v9i4.123

Abstract

Penelitian ini mengembangkan media pembelajaran berbasis Augmented Reality (AR) untuk mata kuliah Fisika Terapan di Politeknik Maritim Negeri Indonesia, berdasarkan IMO Model Course 7.04. Metode yang digunakan adalah Research and Development (R&D) dengan model ADDIE. Media AR dirancang menggunakan Adobe Ilustrator, Unity3D dan Blender 3D, untuk memfasilitasi pemahaman konsep mekanika, termodinamika, dan elektromagnetisme. Hasil penelitian menunjukkan peningkatan signifikan dalam pemahaman dan motivasi belajar mahasiswa. Nilai rata-rata meningkat dari 60 menjadi 80 setelah penggunaan media AR, dengan jumlah mahasiswa yang memperoleh nilai tinggi meningkat dari 12% menjadi 81%, dan yang memperoleh nilai rendah menurun dari 88% menjadi 19%. Angket respon menunjukkan bahwa 85% mahasiswa merasa media AR membantu pemahaman mereka, 90% lebih termotivasi, 80% menganggap visualisasi 3D dan animasi interaktif membuat belajar lebih menarik, dan 75% melaporkan peningkatan keterlibatan selama sesi kuliah. Temuan ini mengindikasikan bahwa media pembelajaran berbasis AR efektif dalam meningkatkan kualitas pembelajaran.
Analisis Energy Efficiency Ratio (EER) pada AC Split yang Diretrofit dari Refrigeran R32 ke R290 dengan Massa Pengisian 40 Persen Rizka Ulum; Gunawan Budi Santoso; Ngatmin; Susanto; Anang Anang Budhi Nugroho; M. Edi Pujianto
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10830

Abstract

The extensive use of split-air conditioning in tropical countries raises environmental concerns because of the high global warming potential of R32 refrigerant. The hydrocarbon refrigerant R290 offers a promising alternative with a very low gross pollutant content (less than 4) and a near-zero ozone depletion potential. However, its flammability and impact on performance at reduced charge densities require further investigation. This study assesses the energy efficiency ratio (EER) of 1 PK split AC retrofitted with 40% charge weight from R32 to R290. The experimental tests were carried out under five operating conditions with room temperature of 23-27 degrees Celsius and ambient temperature of 30-35 degrees Celsius. System parameters including pressures, temperatures, compressor power consumption and the flow rate of the refrigerant were measured. The software REPROP was used for the thermodynamic analysis and the EER calculation. The results show that R32 achieves a higher EER (24.59-26.35 Btu per kWh) than R290 (15.33-17.21 Btu per kWh), resulting in a reduction of efficiency of 30-45 percent. Although R290 showed lower power consumption (0.446-0.476 kW compared to 0.76-0.82 kW in R32), the reduced mass flow rate reduced the cooling capacity. The study concluded that the 40 percent R290 retrofit reduces energy consumption but compromises energy efficiency, which requires further research on optimised weight and system components.
Co-Authors Anang Anang Budhi Nugroho Gunawan Budi Santoso Heri Kiswanto M. Edi Pujianto Rizka Ulum Susanto Susanto