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New generation of low-charge ammonia unit coolers.

Number: pap. n. 328

Author(s) : FILIPPINI S., MERLO U., NOTO LA DIEGA L., et al.


Industrial refrigeration uses ammonia unit coolers for the principle processes of conservation and freezing of foodstuffs. This paper describes the recent evolution of a unit cooler for NH3 application, aiming to lower the refrigerant charge. The main topics are the use of small tube diameter (1/2”), a new concept of refrigerant distribution, a new methodology of performance calculation, aiming to operate with reduced fluid charge. In fact, the revised construction allows operation with a very limited recirculation ratio number, from the typical 3-4 down to values of 1.8 with major containment of the ammonia charge in the unit cooler and consequently within the entire plant. The article describes the basis of the configuration, the experimental activities carried out to optimize performance and the final product arrangement.

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  • Original title: New generation of low-charge ammonia unit coolers.
  • Record ID : 30025984
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0328


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