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Energy consumption reduction in marine refrigerated containers.

Author(s) : LAWTON A. R., MYNOTT T. O., MARSHALL N.

Summary

Until recently, ship owners had little interest in energy saving technologies for refrigerated marine containers. The general philosophy was that oil was cheap and that ships generated their own electricity and there was little benefit to be gained. Their principal objective was low capital cost, reliability and good temperature control, which required continuous modulated refrigeration. This was coupled with the requirement for a well-insulated structure to minimise temperature spread through the cargo. All this began to change when it became clear that the public and governments no longer approved of profligate use of energy. This was driven by increased awareness of the impact of carbon emissions and, principally, by the price of oil reaching USD 150 a barrel in 2008. Most major ship owners have subsequently adopted a total cost of ownership algorithm which computes the lifetime costs of ownership by looking at not only capital costs of purchase but also the cost of repairs and energy during its projected lifetime. The result has been startling and energy consumption has been dramatically reduced by two fundamental changes. Altering the method of temperature control (software) and developments in refrigeration hardware: notably compressor and fan technology. All of these developments have occurred while at the same time the heat leakage of containers was increasing due to the abolition of the best types of insulating foams. These foams have come under scrutiny as a result of their ozone depleting blowing agents.

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Pages: 2010-1

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Details

  • Original title: Energy consumption reduction in marine refrigerated containers.
  • Record ID : 2010-0602
  • Languages: English
  • Source: 1st IIR International Conference on Sustainability and the Cold Chain
  • Publication date: 2010/03/29

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