Turbine-driven compressors are typically used on
large equipment with capacities of 1200 tons or more.
The turbine may be used as part of a cogeneration process
but this is not required. (For a detailed discussion of
cogeneration, see Chapter 7.) If excess steam is available,
in industry or a large hospital, a steam turbine can be
used to drive the chiller. However the higher load on the
cooling tower due to the turbine condenser must be considered
in the economic analysis.