Water is used as a refrigerant, and a humidification cooler (41) which
evaporates the water to generate cold heat and a dehumidifier (42) are
provided. A compressor (50) which compresses water vapor separated by the
dehumidifier (42) is provided. A moisture discharging device (60) which
discharges water vapor compressed in the compressor (50) is provided. The
compressor (50) is driven by a steam turbine (80) capable of generating
rotational power from thermal energy.
