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Double-walled heat exchanger risk analysis for Group B1 and Group B2 refrigerants.

Author(s) : BERGER A. E., FENTON D. L., KAITAY P. V., et al.

Summary

In compliance with ANSI/ASHRAE Standard 15-2001, Safety Standard for Refrigeration Systems, a large quantity of Group B1 or Group B2 refrigerant cannot enter the occupied space of a building. Instead, a secondary fluid must be used to circulate through the refrigeration system's components located within the occupied space. In typical systems, a single-walled liquid-to-liquid heat exchanger is used outdoors with an air coil in the occupied space. In this study, a double-walled heat exchanger is considered to replace these two components, where the double-walled configuration prevents leaking refrigerant from entering the occupied space of a building. Consequently, the double-walled heat exchanger located in the occupied space serves as a direct expansion coil. While any Group B1 or Group B2 refrigerant may be considered, ammonia, which is a Group B2 refrigerant, became the focus of this study due to the availability of commercial absorption units.

Details

  • Original title: Double-walled heat exchanger risk analysis for Group B1 and Group B2 refrigerants.
  • Record ID : 2006-0889
  • Languages: English
  • Source: ASHRAE Transactions. 2004 Annual Meeting, Nashville, Tennessee, USA. Volume 110, part 2 + CD-ROM.
  • Publication date: 2004

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