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Global environmental issues including climate change are extremely important issues that could threaten the very survival of humankind. Solutions or adaptation to these issues requires inclusive global initiatives and in particular companies are expected to play an important role. The HCM Group is working to reduce the environmental impacts of its products throughout the entire life cycle and to provide environmentally conscious solutions to customers and society through ICT, IoT and open innovation.
|CSV targets||Reference year||2030 reduction rate||2017 progress rate|
|・CO2 saving by products||2010||33%||46%|
|・Fuel reduction of hybrid hydraulic excavators||2010||50%||80%|
|・Improvement rate of energy basic unit in production||2005||40%||65%|
|・Improvement rate of waste basic unit in production||2005||40%||83%|
|・Improvement rate of water basic unit in production||2005||50%||86%|
|Development of clean technologies and environmentally conscious technologies||Worldwide greenhouse gas emissions continue to increase, and today they stand at levels more than 50% above those of 1990.
The HCM Group continues to develop and put into practical use construction machinery with low carbon technologies such as hybrid machines and electric machines.
|Reuse and recycling of products||The world today must manage our planet’s limited resources in responsible manner and use them efficiently.
The HCM Group is actively promoting the efficient use of resources, including parts reuse and remanufacturing, through the development of technologies for product recycling and other means.
|Responses to water risk and biodiversity||Protecting water resources and ecosystems is a duty of companies that benefit from natural capital.
The HCM Group is working to use water resources in a sustainable way and protect biodiversity, with our production bases around the world a focal point of our actions.
In response to our target of achieving a CO2 saving rate by products of 33% compared to 2010 by 2030, in FY2017 we were at 46% of this target thanks to the provision of environmentally conscious construction machinery, including new hybrid hydraulic excavators.
Looking ahead, we stand committed to actively contributing to solutions to global environmental issues by not only reducing environmental impacts across the three areas of “manufacturing,” “using” and “taking on challenges,” but also developing environmentally conscious technologies.
HCM has worked on energy conservation initiatives for added value, efficient energy usage in order to increase energy productivity. Such initiatives include the effective utilization of unused energy, reduction of standby power, use of inverters, and shift to LED lighting.
In terms of reducing standby power at production plants, the introduction of “Emilia” electric power monitoring system co-developed with Hitachi, Ltd. makes it possible to ascertain and analyze electric power by focusing on production site needs. Through this solution, we are aiming for the more efficient use of energy. EMilia visualizes the electric power data of each facility at multiple manufacturing bases in real time, making it possible to analyze and diagnose future operating methods and energy productivity. This system reduces standby power through a combination of energy usage standardization within the energy conservation functions of each facility and monitoring of power off. Additionally, this system results in higher efficiency operations by realizing more efficiency energy use.
In FY2017, we focused on the expansion of EMilia overseas. Hitachi Construction Machinery China analyzed the characteristics of electricity usage, including standby power due to forgetting to shut off machinery and standby power at the time of shift changes using data from EMilia, enabling it to build its own pattern for energy conservation management. The company is now working to completely eliminate its use of standby power.
Energy conservation liaison conference using EMilia
KCM Banshu Works used to continually heat the salt bath to prevent salt (nitrate) from losing heat and solidifying during the salt quenching* method of heat treatment. However, starting in FY2017 it began efforts to optimize heating and stopping. As a result, Banshu Works reduced standby power by 135MWh annually, which corresponds to roughly one percent of the entire works’ electricity usage.
* Salt quenching is a form of heat treatment where molded parts are placed in a bath of melted nitrates (salt bath) that is then heated and cooled.
Salt bath at KCM Banshu Works
Since releasing the first generation ZH200-A in 2011, the HCM Group has developed a number of next-generation hybrid hydraulic excavators that help to reduce environmental impacts.
The all-new ZH200-6 hybrid hydraulic excavator released in Japan in September 2017 comes equipped with the TRIAS-HXII system developed using a combination of our long-standing proprietary technologies coupled with the One Hitachi approach and technologies from open innovation. This system achieves impressive fuel economy while maintaining operability through the integrated control of the hydraulic system and hybrid system comprising the engine, electric assist motor, lithium ion battery, power control unit (PCU), and electric swing motor, in order to maximize the machine’s performance. We co-developed the all-new hybrid motor-mounted engine with Toyota Industries Corporation and lithium ion battery with Hitachi Automotive Systems, respectively. Utilizing technologies from the automotive and industrial vehicle fields, the ZH200-6 achieves a 12% reduction in fuel costs compared to the previous ZH200-5B hybrid hydraulic excavator.
ZH200-6 hybrid hydraulic excavator
Parts replacement is essential for construction machinery used in harsh environments. By weight, construction machinery is made up of 80% to 90% steel. Therefore, if a problem occurs with a unit, there was no other choice than to replace it with an all-new one. For this reason, used units are handled as scrap and recycled after being melted down. However, repairing and reusing these units repeatedly instead of disposing of them as scrap not only reduces customers’ running costs, but also results in even greater energy and resource savings. HCM’s parts remanufacturing business was born as a result of matching these customer needs and our commitment to find solutions to social issues.
The parts remanufacturing business involves restoring the functions of used units collected from customers and re-selling them as new remanufactured parts. Units are made from remanufactured parts, making it possible to provide a warranty similar to new parts. Unlike used units or repair parts, the parts remanufacturing business features a cyclical model in which a transition is possible from “recycle” to the higher priority “reuse” within the 3Rs.
The largest remanufactured unit is a dump truck decelerator, which weighs about 12 tons. This is the same as roughly 12 to 13 light motor vehicles, meaning there is a significant effect in terms of conserving resources and reducing waste. HCM has the technologies to remanufacture many other units as well. Our efforts at 12 locations around the world have helped to reduce waste by around 2,900 tons every year.
The HCM Group uses the World Resources Institute’s (WRI) Aqueduct tool to determine areas within its business activities with a high level of water stress. We also utilize this tool to quantify the level of water stress for all of our production bases in Japan and abroad to identify high stress areas.
We are now deploying advanced water conservation activities at Tata Hitachi Construction Machinery Company Private Limited. (India), PT Hitachi Construction Machinery Indonesia, and Hitachi Construction Machinery Tierra in the area near Lake Biwa, where water risks are particularly high.
For example, Tata Hitachi Construction Machinery carries out de-silting work* on a lake with the cooperation of local governments and educational; institutions as an initiative to prepare for water shortages. At Tata Hitachi Construction Machinery Dharwad Plant, silt that collects on the bottom of a lake is re-moved using the company’s own hydraulic excavators, making it easier for rainwater to accumulate.
The greater water volume of the lake increases domestic water used by local residents and improvements along the lake shore have attracted wildfowl. Tata Hitachi Construction Machinery has received letters of appreciation from local residents and local governments detailing how the quality of life has improved.
* De-silting work refers to the act of digging out and removing soil, etc., from the bottom of a port or river.
De-silting work by Tata Hitachi Construction Machinery
The Niju-maru Declaration refers to the commitment (participation in the program) to conduct initiatives that aim to prevent the loss of biodiversity as part of the Niju-maru Project launched by the Japan Committee for International Union for Conservation of Nature (IUCN). The Niju-maru Project invites participation from businesses and local governments through declaration to commit to what they can do to achieve the Aichi Biodiversity Targets, established at the Tenth meeting of the Conference of the Parties to the Convention on Biological Diversity (COP10).
HCM’s Environmental Vision includes “harmonized society with nature,” and as an action to protect biological diversity we have joined the Niju-maru Declaration. Until now, HCM has declared its intent to achieve targets 1 and 17. In fiscal 2017, additional declarations were made by Tadakiko for targets 1, 5, 7, 14, and 17, Hitachi Construction Machinery Tierra for targets 1, 4, 5, 7, 8, 10, 15, and 17, as well as Hitachi Construction Machinery (Shanghai) and Hitachi Construction Machinery (China)* for targets 1, 4, 5, 7, 14, 15, and 17.
The No. 2 Works of Tadakiko is located adjacent to ”Toyotomi Donguri no Mori” in Chiba Prefecture, where employees have been volunteering in forest landscape preservation (satoyama) activities including undergrowth mowing and thinning annually since 2012. Hitachi Construction Machinery Tierra has been conducting a variety of environmental initiatives including putting together biotopes (for organisms to share the same habitat), exterminating invasive species in Lake Biwa, and collecting used food oil for reuse onsite after refining.
We will continue to promote activities as a company that consider ecosystems and in turn lead to their preservation.
The HCM Group strives to prohibit and reduce the use of harmful chemical substances from both finished products and manufacturing processes. We strive to reduce the emission of chemical substances into the air, water and soil that are difficult to reduce, as well as prevent pollution.
In December 2017, Hitachi Construction Machinery (China) completed work on a facility that combines an active carbon filter and RCO (VOC gas cleaning and deodorizing system), which is expected to treat more than 75% of VOCs. This treatment equipment began operation in FY2018. Furthermore, another facility which involves the combination of Zeolite absorber/condenser and RTO (heat storage type deodorizing system) and can treat more than 90% of VOCs is scheduled to be installed in the second half of FY2018.
VOC gas cleaning and deodorizing system at Hitachi Construction Machinery (China)