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Carbon dioxide for supermarkets


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Carbon dioxide for supermarkets

A paper from the winner of the Ted Perry Award

This paper describes natural refrigerant systems that have been developed to reduce significantly both direct and indirect greenhouse gas emissions in commercial applications. The systems use both hydrocarbons and CO2 (R744) as refrigerants. These refrigerants have very low global warming potentials compared with conventional HFC systems. Indirect emissions are also much reduced as the system efficiency is greater than that achieved using conventional HFC refrigeration.

The author discusss an experimental system that has been used to demonstrate the new technology. It then compares the new system with a conventional system in terms of:

  • relative efficiency
  • operating cost
  • CO2 emissions

The paper also evaluates advantages of R-744 systems with relation to its excellent safety and environmental properties, the use of smaller components, and potential financial benefits.