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Komatsu's Environmental and Social Activities Enhancing Quality of Life


Mitigating Climate Change (Mitigating Climate Change through Products and Service)  Thermoelectric Power Generation

Thermoelectric power generation modules are devices which convert heat to electric energy by using the Seebeck effect, in which a temperature difference applied between the junctions of two dissimilar metals produces a potential difference (electromotive force). These modules are manufactured and distributed by KELK Ltd. Thermoelectric power generation modules are installed at all heat-treating furnaces at the Awazu Plant to generate electric power from afterburner combustion heat. Komatsu is also running a test jointly with JFE Steel Corporation to verify the generation of 10kW class electric power from radiant heat from slabs in a continuous-casting machine, working to upgrade the process to reach a stage of practical usefulness.

Thermoelectric power generation could reduce CO2 emissions by up to 1 million tons (2.9×109kWh) per year if plant exhaust heat recovery in Japan progresses further to penetrate 50% of all plants.

Example of Verification Test in Heat-treating Furnace at Awazu Plant

Example of Verification Test in Heat-treating Furnace at Awazu Plant

Example of Verification Test with Continuous-casting Machine (Provided by JFE Steel)

Example of Verification Test with Continuous-casting Machine (Provided by JFE Steel)