Various measures against global warming have been undertaken in the industrial world.
Concerning commercial condensing units, it is necessary to promote the adoption of refrigerants
with low global warming potential (GWP). Mitsubishi Heavy Industries Thermal Systems, Ltd. has
developed the "C-puzzle," which is a high-efficiency condensing unit for freezing and refrigeration
using the natural refrigerant CO2 with a GWP of 1. In this condensing unit, the refrigerant flows in
the medium-pressure range, allowing the reduction of the piping design pressure, the setting of a
wide range of evaporating temperatures, a wide range of ambient operating temperatures and the
installation of the unit with a long pipe. The features and specifications of this product are
described below.
