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Ammonia in traditional HFC territory. 2.

Author(s) : JENSEN S. S.

Type of article: Article, Case study

Summary

This paper details the end-user business benefits associated with considering ammonia in those medium-size applications, which prior to the advent of the Carbon Tax Bill were reserved for HFC refrigerants.These real-life comparisons are based on four dual-stage ammonia refrigeration systems in different geographical locations in Australia, ranging from temperate to subtropical environments. The plant designs are characterised by the application of a range of relatively innovative design concepts, including automatic ambient air defrost in frozen storage facilities, automatic oil return and oil distribution to the compressors, office air conditioning by means of ammonia refrigerant, variable- speed drive semi-industrial and industrial reciprocating compressors, employment of secondary refrigerant in chilled storage rooms, automatic venting of ammonia vapours from frozen storage rooms in the event of leaks, floating evaporating and condensing pressures and so on.The facilities described would traditionally have been reserved for HFC-based refrigeration systems had it not been for the increase in HFC costs. This is commercial reality based on plant capital costs, plant simplicity, the cost of electrical energy and the cost of maintenance.The paper describes the decision-making process on the part of the four end users that led to a departure from traditional thinking and what the practical and commercial consequences have been of a decision in favour of natural refrigerants and high energy-efficiency plant design. In the case of one particular end user, the paper will compare the annual energy consumption of two facilities that are almost identical in terms of floor area and refrigerated volume, but where the two facilities are serviced by two different types of refrigeration systems. One plant is serviced by a traditional HFC-based refrigeration system, the other by a new generation ammonia-based refrigeration system.

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Format PDF

Pages: 44-51 (6 p.)

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Details

  • Original title: Ammonia in traditional HFC territory. 2.
  • Record ID : 30012519
  • Languages: English
  • Source: EcoLibrium - vol. 13 - n. 6
  • Publication date: 2014/07

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