Analysis of refrigeration unit with freecooling
- Authors: Talyzin M.S.1, Pecherskih K.V.1, Skolov A.V.2
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Affiliations:
- International Academy of Refrigeration
- Lekma Holod
- Issue: Vol 113, No 4 (2024)
- Pages: 200-207
- Section: Original Study Articles
- URL: https://journals.rcsi.science/0023-124X/article/view/357964
- DOI: https://doi.org/10.17816/RF696789
- EDN: https://elibrary.ru/OIOCPF
- ID: 357964
Cite item
Abstract
BACKGROUND: Refrigeration units are widely used in the dairy industry, in particular to produce ice water with a temperature of 0.5–2 °C, which is used for primary cooling of milk after milking. This process is critical to prevent bacterial growth and maintain milk quality. The cooling rate affects the microbiological stability and shelf life of the product. Reducing energy consumption is an urgent task at all stages of the refrigeration plant life cycle. The importance of this task is addressed at the government level (Federal Law No. 261-FZ On Energy Saving, Increasing Energy Efficiency and Amendments to Some Laws of the Russian Federation) and by the owners of refrigeration equipment. One way to address the problem of energy saving is to use natural cold if the ambient temperature is lower than the required coolant temperature or the temperature in the cooled room. As a rule, a coolant circuit is used to implement this technology. However, it is possible to use only the coolant circuit.
AIM: To analyze the refrigeration unit with the free cooling capability without an additional coolant circuit at the design stage.
METHODS: To study a refrigeration unit with free cooling used to produce ice water without an intermediate coolant, we resorted to the entropy-statistical method of thermodynamic analysis, which allows to identify losses in the elements of the refrigeration system. As a refrigerant, we considered R717 as a most promising refrigerant for future use in industrial refrigeration plants.
RESULTS: Free cooling reduces energy losses in the cycle by 68.65%.
Potential work generated during the implementation of the free cooling circuit is used to compensate for losses due to unbalanced heat exchange in the condenser and evaporator.
CONCLUSION: The analysis showed the prospects of a free cooling system without an intermediate coolant.
Full Text
##article.viewOnOriginalSite##About the authors
Maksim S. Talyzin
International Academy of Refrigeration
Author for correspondence.
Email: talyzin_maxim@mail.ru
ORCID iD: 0000-0001-7244-1946
SPIN-code: 6524-3085
Cand. Sci. (Engineering)
Russian Federation, MoscowKonstantin V. Pecherskih
International Academy of Refrigeration
Email: const83@mail.ru
Russian Federation, Ekaterinburg
Andrey V. Skolov
Lekma Holod
Email: skolov@lekmaholod.ru
Russian Federation, Rostov-on-Don
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