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Research article

Vol 5 No 1 (2011): Volume 5, Number 1, 2011

Performa sistem autocascade dengan menggunakan karbondioksida sebagai refrigeran campuran

DOI
https://doi.org/10.22146/jrekpros.1894
Submitted
November 14, 2023
Published
June 30, 2011

Abstract

Most refrigeration systems today use refrigerant which causes ozone depletion or global warming. Therefore, alternative natural refrigerants are highly required. One potential candidate is CO2. However, high pressure of CO2 limits its application in conventional refrigeration system. To solve this problem, a low investment cost of autocascade refrigeration system is used. This research investigated autocascade refrigeration system using a mixture of CO2 (R744) and R12, in comparison with environmentally friendly refrigerant mixture of CO2 (R744) and R600a. The parameters analyzed were (1) evaporation temperature, (2) condensation temperature, (3) suction temperature, (4) discharge temperature, (5) suction pressure, and (5) discharge pressure. The experiment results showed that an increase of CO2 concentration by 10% or more in the autocascade refrigeration system could raise system pressure. Therefore, the increase of CO2 pressure should be within the allowable limit of the working pressure of the compressor.

References

  1. ASHRAE Handbook, 2006. Refrigeration System and Applications (SI), American Society of Heating, Refrigerating, and Air-Conditioning Engineer, Atlanta, Georgia.
  2. Christensen. Kim. G, Bertilsen. P., 2003. Refrigeration Systems in Supermarkets with Propane and CO2 – Energy Consumption and Economy, Proceedings International Congress Of Refrigeration, ICR0131, Washington, DC , USA, 2003.
  3. Cox. N., 2007. Working Towards More Environmentally Friendly Refrigerant Blends, 12th European Conference, Milano, Italy, Juni 8 – 9, 2007.
  4. Kim. S. G., Kim. M. S., 2001. Experiment and Simulation on The Performance of An Autocascade Refrigeration System Using Carbon Dioxide as A Refrigerant, International Journal of Refrigeration, 25 (2002) : 1093 – 1101.
  5. Reinholdt. Lars, Andreasen. Marcin. Blazniak, 2007. Industrial Freezers for Food Utilizing CO2 Part 2: Development and Testing of A CO2 Cascade System, Spiral Freezer and Ice-Cream Freezer, International Congress of Refrigeration, ICR07- B2-454, Beijing, 2007.
  6. Yu. Jianlin, Zhao. Hua, Li. Yanzhong, 2008. Application of An Ejector in Autocascade Refrigeration Cycle for The Performance Improvement, International Journal Of Refrigeration, 31 (2008):279-28.