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JDWSugar Mills, Pakistan
Challenge:
For Jackson & Jackson Refrigeration,
based in Innisfail Queensland, to
supply, install and service a special
air conditioning system for the long-
termdevelopment of the sugar cane
industry in Pakistan. The aimof the
5 year project run by JDWSugar Mills
Limited, was to produce varieties
of sugar cane that was high yield,
resistant to pests and disease, and
be able to thrive in local conditions.
The project required Jackson &
Jackson Refrigeration to supply and
install three items of plant breeding
equipment to two different sites in
Pakistan. At the Photo Period Facility
at Makli Hills, Sindh, Pakistan the
installation included 3 Temperzone
ISD 135K – OAS110K – special units.
The key function at this facility is
to control and simulate external
weather conditions in the small
confines of a chamber.
Solution:
The air conditioning for the project
was based on split-ducted, reverse
cycle air conditioning systems. Each
chamber was fitted with an individual
air conditioning system to allow for
heating or cooling as required to
maintain the required temperature.
The temperature sensing is carried
out at three separate levels in the
chamber and averaged to take into
account any temperature gradient
present within the chamber.
Result:
The purpose of the chamber was
to encourage the sugar cane to flower
which is triggered by day length.
By controlling the day length in the
chamber through the lighting and
air conditioning, the sugar cane can
be tricked into flowering. This allows
them to cross breed varieties from
all around the world, including some
fromQld, to create new varieties
better suited to local Pakistan
conditions. Normally, in the field a 35%
flowering rate can be achieved once a
year. With this facility, a 95% flowering
rate can occur 3 times a year. The
chamber will substantially speed up
the entire cross breeding program.
Case Studies
Page 15