TABLE OF CONTENTS

The preferred system in the retail industry is dual temperature CO 2
DX Booster systems.
Because CO 2
is highly suitable for heat recovery to tap water and to building heating
such integrated solutions are commonly applied to improve the overall energy
efficiency of the building even further.
The Advansor solution contains only one refrigerant, CO 2
, and offers obvious
environmental benefits as well as energy savings.
Results
Energy Efficiency
Results of cycle simulation using DRY hourly data show that a simple CO 2
booster
system offers superior performance to cascade systems in colder regions of Europe and
comparable energy consumption even in Southern Europe. The results comply very
well with field measurements. Furthermore, the results are interesting because the CO 2
process below can be improved by various means, additionally 5-10% in the warmer
climates.
City
Energy Index to CO2 DX Booster
HFC with
secondary’s
Cascade
(HFC134a / CO 2
)
Stockholm (Sweden) 134 120
Oslo (Norway) 134 120
Paris (France) 127 113
Lyon (France) 123 109
Marseille (France) 117 103
Barcelona (Spain) 116 103
SUMMARY
Summary overview of incentives for retailers refrigerant transition to CO 2
in different
countries:
• Denmark: HFC taxation, HFC ban, Energy savings
• Norway : HFC taxation, Energy savings
• Sweden and Finland: Energy savings
• Switzerland: Rules and Energy savings
• UK: Carbon footprint reduction schemes
All through Europe, CO 2
has been implemented safely and reliably as well as proving its
benefit for the environment and energy reductions.
61
Heat recovery as mentioned above is more beneficial with CO 2
than for any other
refrigerant because the hot gas temperature is warmer and the energy density is higher.
Furthermore, the heat extraction can be controlled much better to match the building
online capacity demand. Recent Swiss field investigations comparing R134a and CO 2
report up to 40% increase of heat recovered at normalized refrigeration power input.