Business
trend
Japan is
behind western countries in the application of earth thermal. Thanks to technological
development, however, it has become possible to use earth thermal in a clean
room that needs strict management of room temperature, and Fujitsu will start to
use earth thermal for energy saving in one of its production plants shortly. In
this plant, a total of 31 pipes are dug in down to 30 m below ground to collect
earth thermal that is 15 degrees centigrade throughout the year. The plant will
collect earth thermal efficiently using the heat pump technology. The collected
earth thermal will also be used to warm air after dehumidification in summer.
The
capital investment is 70 million yen, and the payback period is 14 years. The
company plans to introduce the same system in other production plants. The system
is estimated to reduce 50 kiloliters per year as compared with the existing
air-conditioning equipment that uses city gas. In addition, about 120 tons of
carbon dioxide emissions can be reduced, the company estimates. The application
of earth thermal is growing popular steadily in Japan now, and it is expected
to accelerate with the introduction in production plants.
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