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Heat pumps using natural working fluids: an environmentally friendly solution.

Author(s) : CAVALLINI A., DEL COL D., ZILIO C.

Type of excerpt: Other

Summary

Heat pumps and reversible units are considered as a viable solution for the reduction of primary energy consumption in heating and refrigerating applications. In this paper, water-heating heat pumps operating with transcritical carbon dioxide vapour compression cycle are considered. For this particular application the market looks promising, especially in Japan where the Government, thanks to a favourable legislation, forecasts that the installed units in 2010 will be around 5 million. With regard to hydrocarbons, the use of propane as the refrigerant in heat pumps is reviewed. The main problem related to the adoption of hydrocarbons is their flammability, which has prevented their use in large scale. Additional safety restrictions are then required and, since the possible hazards depend on the total amount of refrigerant trapped in the system, the charge minimization is a major design constraint. Some technological results are reported in this paper, with particular focus to the charge reduction.

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Pages: 19-21

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Details

  • Original title: Heat pumps using natural working fluids: an environmentally friendly solution.
  • Record ID : 2009-0363
  • Languages: English
  • Subject: General information
  • Source: Ozone protection, climate change and energy efficiency. Special international issue of Industria Formazione on refrigeration and air conditioning.
  • Publication date: 2008/05

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