In recent years, the heat supply business in Japan has been on a decreasing trend since
reaching its peak sometime around 2007. There is still high demand for large-scale district heating
and cooling around the world, mainly in the Middle East and Asia regions, and a number of
district heating and cooling plants (hereafter district cooling plants) have been constructed or are
being planned. However, the optimal plant design and operational method with consideration for
the meteorological conditions and integrated characteristics of each region have yet to be
established. Mitsubishi Heavy Industries Thermal Systems, Ltd. proposed a heat source system with
consideration for the meteorological conditions and load characteristics of each region, and made
a comparison of the annual energy consumption between the conventional system and the proposed
system. As a result, we found that it is effective to select a type of chiller suitable for the
meteorological conditions and to manage an optimal number of chillers.
