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All Journal Jurnal Rekayasa Mesin International Journal of Marine Engineering Innovation and Research
Natasya, Deva
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Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Thermo-Environmental Performance Analysis of Cascade Refrigeration System on Cruise Ship Applications Natasya, Deva; Rayhan, Fajri Ashfi
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 1 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i1

Abstract

This study analyzes the thermo-environmental performance of cascade refrigeration systems applied to cruise ships to support energy efficiency improvement and emission reduction in accordance with MARPOL Annex VI regulations. Cruise ships have high energy demands, particularly in cooling systems that significantly contribute to overall energy consumption and environmental impact. This research aims to evaluate the effect of operating parameters and refrigerant selection on system performance using exergy efficiency, Ecological Coefficient of Performance (ECOP), and Total Equivalent Warming Impact (TEWI) as evaluation indicators. A thermodynamic model based on mass, energy, and exergy balance equations is applied, with simulations conducted under various operating temperatures and refrigerant combinations. The results indicate that increasing operating temperature from 275 K to 295 K reduces exergy efficiency and ECOP due to increased irreversibility, while TEWI rises significantly as a result of higher energy consumption. Hydrocarbon refrigerants such as R600a/R290 and R152a/R290 show the best performance in terms of both energy efficiency and environmental impact. In contrast, CO₂-based combinations tend to exhibit lower efficiency and higher environmental impact under certain conditions. Overall, selecting appropriate refrigerants and optimizing operating conditions are essential to achieve a balance between system efficiency and environmental sustainability in marine refrigeration systems.
Thermodynamic Performance Study of Cascade Cooling Systems on Cruise Ships with Mixed Working Fluids and Operating Parameters Rayhan, Fajri Ashfi; Natasya, Deva
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2026): Volume 21, Nomor 1, April 2026
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v21i1.7412

Abstract

The cooling system is an important component on cruise ships to maintain engine operating temperatures and operational reliability. However, conventional cooling systems still have limitations in terms of energy efficiency and high thermodynamic losses. This study aims to analyze the performance of cascade cooling systems on cruise ships with variations in mixed working fluids, temperatures, pressures, and mass flow rates. The analysis was conducted using an energy and exergy approach to evaluate the Coefficient of Performance (COP), exergy efficiency, and exergy destruction. The study was conducted on a modified two-stage cascade cooling system. The working fluids analyzed include R22/R404A, R290/R404A, and R290/R600a. The results show that a decrease in mass flow rate in the high-temperature cycle increases the COP value, while an increase in temperature in Heat Exchanger Y increases exergy efficiency. The R22/R404A combination produced the highest exergy efficiency, while the hydrocarbon-based combination showed potential for COP improvement. This study demonstrates that optimizing operating parameters and selecting the appropriate working fluid can improve the energy efficiency of cascade refrigeration systems on cruise ships.
Co-Authors Rayhan, Fajri Ashfi