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All Journal R.E.M (Rekyasa Energi Manufaktur) Jurnal
Nia Nuraeni Suryaman
Universitas Widyatama Bandung
Engineering

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Performance Analysis of Waste Heat Recovery-Based Fish Drying System in Block Ice Machine: Analisis Kinerja Sistem Pengering Ikan Berbasis Waste Heat Recovery Pada Mesin Es Balok Agung Firmansyah; Nia Nuraeni Suryaman; Arifin Santosa; Ahmad Rajani
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 11 No 1 (2026): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v11i1.1852

Abstract

Penelitian ini menganalisis performa sistem pengering ikan berbasis pemanfaatan panas buang kondensor mesin es balok melalui metode waste heat recovery tanpa pemanas tambahan eksternal. Metode penelitian menggunakan eksperimen kuantitatif dengan membandingkan sistem pengering berbasis panas kondensor dan pengeringan konvensional menggunakan sinar matahari langsung. Analisis penelitian difokuskan pada karakteristik termal, penurunan kadar air, performa pengeringan, dan konsumsi energi sistem. Sistem pengering berbasis panas kondensor menghasilkan kondisi pengeringan yang lebih stabil dengan temperatur berkisar antara 31,17-40,87°C dan relative humidity menurun dari 100% menjadi 57%. Massa ikan menurun dari 1000 gram menjadi 413 gram yang menunjukkan terjadinya evaporasi air secara kontinu selama proses pengeringan. Sistem menghasilkan nilai rata-rata Specific Energy Consumption (SEC) sebesar 9,40 kWh/kg dan Specific Moisture Extraction Rate (SMER) sebesar 0,10 kg/kWh. Hasil penelitian menunjukkan bahwa panas buang kondensor berpotensi digunakan sebagai sumber energi alternatif pada proses pengeringan ikan yang lebih stabil, terkontrol, dan tidak bergantung secara langsung terhadap kondisi cuaca. Namun, optimasi lebih lanjut terhadap performa kondensor dan kapasitas sistem refrigerasi masih diperlukan untuk meningkatkan performa perpindahan panas dan efisiensi energi sistem pengering.
Prototype Energy Saving Car Chassis Design and Analysis Using 6061 Aluminum Material : Perancangan Desain dan Analisa Chassis Mobil Hemat Energi Tipe Prototype dengan Material Aluminium 6061 Eka Adji Pangestu; A'rasy Fahruddin; Ali Akbar; Rachmat Firdaus; Iswanto; Nia Nuraeni Suryaman
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 9 No 2 (2024): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v9i2.1706

Abstract

The chassis is an important component car which functions to support the load on the vehicle and has a strong construction. The chassis, as the main support for all vehicle componentsy. Increased fuel use and rising global crude oil prices have encouraged research into energy saving cars with special designs that can reduce fuel consumption and pollutant emissions. The design process with variations in rollbar shape and variations in cross sectional shape with 6061 aluminum material using Autodesk Inventor 2024 software. After the design process is complete, stress analysis test stage is carried out to obtain analysis data, namely von misses stress, strain, displacement, safety factor. The results of the chassis design using concept B with a pipe cross-sectional shape and rollbar fillet model are more recommended, because it has better von Mises stress value and a better safety factor, besides that the concept B chassis design is easier in the assembly process with prototype type energy efficient car body.
Experimental Study of Bifacial Solar Panels with Reflective Surface Variations in Bandung, Indonesia Rofi Barokah; Nia Nuraeni Suryaman; Ahmad Rajani
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1758

Abstract

This study aims to evaluate the performance of bifacial photovoltaic (PV) panels under different reflective surface conditions in a tropical urban environment, specifically in Bandung, Indonesia. Bifacial PV systems offer the advantage of capturing solar radiation from both the front and rear sides, with performance significantly influenced by the surface beneath the panels. The experiment involved three surface types: asphalt, untreated paving blocks, and paving blocks coated with white paint. Each panel was installed at a fixed 8° tilt facing north, and data were collected from 09:00 to 15:00 local time. The results indicate that the white-painted surface produced the highest power output, reaching up to 410 Watts, followed by paving blocks at 390 Watts and asphalt at 370 Watts. Although all surfaces received a similar radiation pattern, their differing reflectivity affected the amount of radiation reaching the rear side of the bifacial panels. The white-painted surface, characterized by high reflectance, not only enhanced rear-side radiation capture but also maintained a more stable power output after peak solar hours. These findings highlight the critical role of surface reflectivity in optimizing bifacial PV performance and support the strategic use of surface materials in PV system deployment, particularly in tropical climates. This study contributes valuable empirical data to the growing field of bifacial PV applications and offers practical insights for improving energy yield in real-world tropical settings.
The Use of R290 As a Replacement For R404A in Block Ice Machines Vigasta Febiadisti; Nia Nuraeni Suryaman; Arifin Santosa; Aep Saepudin; Andri Setiawan
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1763

Abstract

This study evaluates the performance of R290 refrigerant as an alternative to R404A in block ice-making machines based on vapor compression cycles. The method used is a quantitative experimental approach with direct testing of compressor power, condenser power, evaporator power, and coefficient of performance (COP) parameters. Test results indicate that R290 has lower power consumption and a higher COP compared to R404A, with a COP of 3.22 (R290) versus 2.48 (R404A). Additionally, R290 has a significantly lower global warming potential (GWP), making it more environmentally friendly. The more stable and efficient thermodynamic performance of R290 supports its effectiveness as an economical and sustainable alternative refrigerant for modern cooling applications.
Co-Authors A'rasy Fahruddin Aep Saepudin Agung Firmansyah Ahmad Rajani Ahmad Rajani Ali Akbar Andri Setiawan Arifin Santosa Eka Adji Pangestu Iswanto Iswanto Rachmat Firdaus Rofi Barokah Vigasta Febiadisti