a feasibility analysis of replacing the standard ammonia refrigeration device with the cascade nh3/co2 refrigeration device in the food industry

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ID: 167856
2015
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Abstract
The thermodynamic analysis demonstrates the feasibility of replacing the standard ammonia refrigeration device with the cascade NH3/CO2 refrigeration device in the food industry. The main reason for replacement is to reduce the total amount of ammonia in spaces like deep-freezing chambers, daily chambers, working rooms and technical passageways. An ammonia-contaminated area is hazardous to human health and the safety of food products. Therefore the preferred reduced amount of ammonia is accumulated in the Central Refrigeration Engine Room, where the cascade NH3/CO2 device is installed as well. Furthermore, the analysis discusses and compares two left Carnot¢s refrigeration cycles, one for the standard ammonia device and the other for the cascade NH3/CO2 device. Both cycles are processes with two-stage compression and two-stage throttling. The thermodynamic analysis demonstrates that the selected refrigeration cycle is the most cost-effective process because it provides the best numerical values for the total refrigeration factor with respect to the observed refrigeration cycle. The chief analyzed influential parameters of the cascade device are: total refrigeration load, total reactive power, mean temperature of the heat exchanger, evaporating and condensing temperature of the low-temperature part.
Reference Key
dennis2015thermala Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Jankovich Dennis;Osman Krešimir
Journal Nature
Year 2015
DOI
10.2298/TSCI130611097J
URL
http://www.doiserbia.nb.rs/img/doi/0354-9836/2015/0354-98361400097J.pdf
Keywords
carbon dioxide ammonia condensing temperaturemechanical engineering and machinery

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