IIR document

The SHERHPA project: natural refrigerants for heat pumps.

Author(s) : THONON B.


The global aim of the SHERHPA (Sustainable Heat and Energy Research for Heat Pump Application) project is to develop the next generation of heat pump systems using natural refrigerants such as ammonia, carbon dioxide and propane. The technical challenges are quite clear in that natural refrigerants have different thermodynamic and chemical properties to existing refrigerants. This requires redesigning the principal components like heat exchanges and compressors to optimise the heat transfer. At the same time, appropriate control strategies have to be developed considering both the application and the types of components used. Other challenges involve material compatibility and requirement imposed by EU regulations to minimise the amount of refrigerant in the system. The initial performance of the components have been checked, and the results have been used to determine parameters like mass flow rates, durability, leakage and control parameters and also build confidence in the ability of the various components to be successfully integrated. In a next phase it is likely that as many as 10 prototype systems will be designed, manufactured and evaluated with sizes ranging from 2 to 100 kW.

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Pages: 2006-2


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  • Original title: The SHERHPA project: natural refrigerants for heat pumps.
  • Record ID : 2007-1790
  • Languages: English
  • Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
  • Publication date: 2006/05/29


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