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Komatsu's Environmental and Social Activities Enhancing Quality of Life


Mitigating Climate Change(Initiatives to Mitigate Climate Change in Business Operations)  Halving Electricity Usage Project

Halving Electricity Usage Project

As part of its continuing effort to reduce environmental burdens by cutting CO2 emissions, Komatsu has decided to accelerate its pace of power usage reduction by boosting productivity drastically in anticipation of lingering nationwide power shortages in 2012 and after since their outbreaks in the service areas of Tokyo Electric Power Company, Inc. and Tohoku Electric Power Company, Inc. in the wake of the Great East Japan Earthquake in 2011.

Since an ultimate reduction of 50% or more has come into sight after in-depth analyses of electricity usage status, Komatsu is now geared at pursuing a new goal of cutting the peak power 50% from its summer 2010 level while checking its electricity usage to reduce environmental burdens.

Conceptual Approaches to Reducing Electricity Usage
Conceptual Approaches to Reducing Electricity Usage

Komatsu is committed to three basic concepts of reducing electricity usage as follows:

  • (1)Visualize electricity usage to eliminate waste
  • (2)Production reform
  • (3)Use alternative energy sources

(For more details, please refer to the “Halving Electricity Usage Project” ection of the Environmental Report Digest 2014.)

FY2014 Status
(1)Status of Group-wide electricity usage reduction

The peak power reduction effort has progressed successfully, suggesting that Komatsu's own target reduction of 50% will be attained in FY2015.

■Electricity usage change forecasts
Electricity usage change forecasts
■Saving in electricity purchases at the new assembly plant (in terms of the FY2010 output)
Reduction in power consumption at the newly rebuilt structure (Awazu Plant)
(2)Status of electricity usage reductions at a new assembly shop at Awazu Plant

With impetus mainly from a full launch of biomass power generation scheduled for FY2015, electricity usage reductions at a new assembly shop at Awazu Plant commissioned into service in 2014 are expected to reach 92% as planned.



Whole view of the new assembly shop

Whole view of the new assembly shop

Full underground pit structure

Full underground
pit structure

Assembly line made easier to work with

Assembly line made easier to work with



Wood Biomass Power Generation

Biomass power generation building

Biomass power generation building





A wood biomass power generation system has been set up at Awazu Plant, jointly with the KAGA Forest Association in Ishikawa Prefecture in which the plant is located, to make effective use of the timber from forest thinning that had been heretofore left unused in the neighboring mountain forest.

The system has boilers fueled by wood chips supplied from the KAGA Forest Association (7,000 tons per year) and the steam generated by the boiler is used to power the compressor, generator and absorption refrigerators anticipating to save about 1,400 MWh of electricity and 800 kl of heavy oil annually.

Waste heat used for power generation and air conditioning boosts energy utilization efficiency to as high as 65% in the winter time.

Boiler

Boiler

Compressor

Compressor

Generator

Generator