31 January 2013

A practical application of continous optimisation of a district heating and cooling plant in Japan

The importance of plant commissioning, or Testing, Adjusting and Balancing, is well known to Japanese engineers,
but there are as yet few examples of their application, especially of continuous optimisation as an ongoing
extension of commissioning. Against this background, this article presents an analysis of ten years’ operational
results of a district heating and cooling (DHC) plant. The plant is one of the most efficient DHC plants in the
country, with the largest thermal energy storage capacity in the country (a total water volume of 19 060 m3). The
plant has been in operation since March, 2001. With over ten year’s operational data therefore available, it is possible
to see the results of continuous optimisation and of the use of high-capacity thermal energy storage.