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Supported by a grant from Norway through the Norwegian Financial Mechanism  

Development of High-Efficiency, Small-Scale Heat Pumping Units Using an Environmentally Benign Working Fluid R744 and Expansion Work Recovery with Ejectors www.itc.polsl.pl/co2heatpumps e-mail: Ten adres pocztowy jest chroniony przed spamowaniem. Aby go zobaczyć, konieczne jest włączenie w przeglądarce obsługi JavaScript.

The project is financed by Polish-Norwegian Research Fund and is realized both in Poland (Institute of Thermal Technology at Silesian University of Technology, Gliwice) and in Norway (SINTEF Energy Research, Trondheim). The scheduled duration is 1st September 2008 - 30th April 2011. The total budget of the project is 1.5 M?.

The main goal of the project is a technological development of the two-phase ejector system for the small-scale heat pumping units (refrigerators, heat pumps) utilizing environmentally benign working fluid (specifically CO2). The long-term goal of the applicant and its partner is commercialization of the system being the subject of the project.

In the project the ITT focuses on the numerical simulations, while the basic goal for SINTEF is to deliver the experimental test rig, which is planned to be constructed at the SINTEF laboratory in Trondheim. Benefits resulting from the potential widespread use of the system being the subject of the project are the following:

  • Employing an environmentally benign, inexpensive and easy accessible working fluid which plays an important role especially when devising small-scale units for distributed use, considering their great quantity and the total amount of the fluid charged
  • Use of an ejector instead of a typical throttling valve in commercially available units brings additional environmental benefits due to the substantial energy efficiency improvement which indirectly results in:
    • reduction of electrical energy consumption
    • further GHG emission reduction
    • reduction of the so-called low emission
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