Wednesday August 28, 2019 from 15:40 to 17:00
FIRST MEASUREMENT RESULTS OF COOLING AND HEAT-PUMP OPERATION OF AN ENVIRONMENTAL TEST CHAMBER USING CO2 AS REFRIGERANT
Andreas Wagner1, Thomas Tannert2, Ullrich Hesse3.
1Bitzer-Professur für Kälte-, Kryo- und Kompressorentechnik, Technische Universität Dresden, Dresden, Germany; 2Bitzer-Professur für Kälte-, Kryo- und Kompressorentechnik, Technische Universität Dresden, Dresden, Germany; 3Bitzer-Professur für Kälte-, Kryo- und Kompressorentechnik, Technische Universität Dresden, Dresden, Germany
The EU F-Gas Regulation brings a strict schedule for phase-down and a ban of synthetic high-GWP refrigerants. Small industry sectors like environmental simulation are affected as well. Recent announcements of supply constraints and a massive price increase led to the question if new drop-in alternatives are available. CO2 is a well-known and future reliable alternative and comes into focus for the environmental test industry.
A former work shows a concept of an environmental test chamber using CO2 as refrigerant. Its cooling cycle brings inter alia a heat-pump mode. It was theoretically evaluated by a transient simulation model.
This work shall answer the question if the concept works in reality. First measurements of a test rig containing the new concept cycle are made and presented.
The measurement results show a big energy saving potential. Further lower chamber temperatures can be achieved compared with a baseline chamber using R452A.