Ms. Daniela Elena Mitu Profile

Daniela Elena Mitu

at Constanta Maritime Univ

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Proceedings Article | 20 February 2015 Paper

A new technology for fishing vessels: the use of ejector expansion refrigeration cycle

Feiza Memet, Daniela Elena Mitu

Proceedings Volume 9258, 92580C (2015) https://doi.org/10.1117/12.2066266

KEYWORDS: Liquids, Thermodynamics, Climate change, Ozone, Industrial chemicals, Safety, Diffusers, Oceanography, Toxicity

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A challenge that fishing industry is facing is the improvement of the refrigeration technology on board of fishing vessels. This paper deals with vapor compression refrigeration systems included on board of these ships. In these systems, significant thermodynamic losses are encountered in the expansion valve, during throttling process. Because it is possible to improve a thermodynamic process by decreasing irreversibility, in this paper it is used an ejector in order to reduce throttling irreversibility. A new technology results, the use of an ejector as a refrigerant expander leading to the ejector expansion refrigeration cycle. The theoretical study developed here will reveal a performance improvement of the new cycle. Also, because the traditional refrigerant used in marine refrigeration is R 134a, which presents a high value of its Global Warming Potential, the performance analysis is extended for the case of the use of other more environmentally friendly refrigerants: propane and isobutane.

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