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Mitigation of Climate Change by Products and Services

In order to promote developments aimed at mitigating climate change, Toshiba Group assesses the entire life cycle of products. We will provide energy-saving products worldwide and reduce CO2 emissions in order to contribute to mitigation of climate change.

Reducing CO2 emissions through the Greening of Products initiative

With a view to mitigating climate change, Toshiba Group is striving to reduce CO2 emissions through the Greening of Products initiative aimed at developing products by setting eco-targets for mitigation of climate change to improve major environmental performance.

Toshiba Group's products cover a wide range of categories from consumer electronics to power generation plants, and CO2 emissions from these products in different stages of their life cycle vary from one product to another. Under the Fifth Environmental Action Plan, we will continue to evaluate products throughout their entire life cycle. At the same time, we will focus our efforts on reducing environmental impact during customers' use of products, which has a large effect on the environmental efforts of Toshiba Group as a whole, and further enhance the annual CO2 emissions reduction effect that may be achieved if conventional products are replaced by eco products.

Results of FY2013

Since FY2010, we have set eco-targets regarding the mitigation of climate change in order to develop products with the highest level of environmental performance. In FY2013, we were able to reduce CO2 emissions by 10.39 million tons per year by offering newly developed products throughout the world.

Future initiatives

Toshiba Group will continue to reduce CO2 emissions across all its products by identifying key factors that contribute to reducing CO2 emissions and by sharing advanced examples and core technologies among group companies. At the same time, we will expand our business in global markets for home appliances, such as digital products that use substantially less energy and LED light bulbs that have large energy-saving effects, as well as for social infrastructure products—especially in markets in emerging countries where there is a rapidly growing demand for products that can achieve great reductions in CO2 emissions. Through these measures, we aim to achieve a reduction in CO2 emissions of 15 million tons by FY2015.

Changes in reductions in CO2 emissions (FY2013)
Changes in reductions in CO2 emissions

Breakdown of reductions in CO2 emissions (FY2013)
Breakdown of reductions in CO2 emissions

Percentages of CO2 emissions from the lifecycle stages of Toshiba Group's products
Percentages of CO2 emissions from the lifecycle stages of Toshiba Group's products

Breakdown of reductions in CO2 emissions by area (FY2013)
Breakdown of reductions in CO2 emissions by area

* The photos is for illustrative purposes only.

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Case Study: Expanding the application of heat pumps to high-temperature heat sources

Toshiba Carrier Corporation

Heat sources with temperatures close to 100℃ are required for many processes, including food processing, chemical manufacturing and coating. Conventional systems use boiler steam as such a heat source. Although using a heat pump as a heat source can greatly reduce CO2 emissions, for general heat pump chillers it is difficult to realize high temperatures exceeding 55℃.

To overcome this drawback, Toshiba Carrier Corporation has developed a circulated heating heat pump that provides a high-temperature, large-capacity heat source by using a double refrigeration cycle with two different types of coolants. Using this heat pump system as a heat source in processes that previously have been carried out by boiler steam can reduce CO2 emissions by more than 50%.

Double refrigeration cycle
[Image] Double refrigeration cycle

This figure is simplified. The heat pump is equipped with parts not depicted in the figure, such as a four-way switching valve and container.

[Image] CAONS700/CAONS140/CAONS45

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Case Study: Saving energy with a tiered storage system

As cloud computing becomes more widely used, energy use also increases due to expansion of total data capacity. To cope with this dilemma, Toshiba Group has developed a tiered storage system that is constructed by combining high-performance Enterprise SSDs*1 and low-cost, large-capacity HDDs*2.

This tiered storage system provides access performance approximately 7.5 times higher than a conventional storage system comprised only of Enterprise HDDs. The system also reduces the number of drives by approximately 64% and power consumption by approximately 55%, thereby contributing to cost reduction and mitigation of climate change (percentages calculated by Toshiba).

Enterprise SSD : Enterprise Solid State Drive. A flash memory drive for corporate use
HDD : Hard Disk Drive

[Image] Storage system that supports cloud computing

[Image] Benefits of a tiered storage system (calculated for a 300-TB system)

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Optimal product life cycle management through supply chains / Toshiba Corp. Digital Products & Services Company

In the United States, retailers, suppliers, universities, governments, NGOs, and other stakeholders are all working as members of The Sustainability Consortium (TSC), which was launched in July 2009, to enhance environmental assessment and management, with their initiatives now developing into a global endeavor.

Since January 2010, Toshiba America Information Systems, Inc. has participated in these activities as a member in the electronics sector working group. We have been promoting initiatives aimed at implementing optimal product life cycle management, including creating a measurement and reporting system for product sustainability and developing related IT tools.

[Image] Chart of Optimal product life cycle management through supply chains

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Case Study 1: Mini-SMMS, a localized air conditioner system for emerging countries

[Image] Mini-SMMS series
Mini-SMMS series

Toshiba Carrier Corporation

The company has developed an energy-saving multi-purpose air conditioner system localized for high-end condominiums in emerging countries. Equipped with a new DC twin rotary compressor designed to improve operational efficiency in low-capacity operation areas, this product has achieved the industry’s highest IPLV*1, 2 (5.3). In order to maintain the volume of coolant flow into the interior unit at an appropriate level, the piping is designed to minimize energy loss based on actual usage conditions.

Toshiba internal data as of January 2012 (comparison with other companies’ products for emerging countries)
IPLV (Integrated Part Load Value): Annual energy consumption efficiency indicator used in China, which includes energy consumption for partial load operation

[Image] Built-in technologies

[Image] Improvement of efficiency in low-capacity areas

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Case Study 2: SPACEL-GR, a standard elevator

Toshiba Elevator and Building Systems Corporation

In order to further improve riding comfort, the company used controllers and new roller guides developed with the most advanced technologies. In addition, the company also introduced a high-efficiency PMSM*1 motor and LED lighting, reduced standby power consumption and provided an option to use a regenerative power feature that returns the regenerative power generated by the motors during elevator operation to the building. Through these measures, power consumption was reduced as much as 50%, thereby achieving the industry’s highest level of energy-saving performance.*2

PMSM: Permanent Magnet Synchronous Motor
Toshiba internal data as of November 2011

[Image] Changes in motor capacity for 11-person elevators operated at a speed of 60 m/min (internal data)

[Image] Elevator structure and effect items

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Case Study 3: Next-generation sorting/distribution solution making use of ICT

Toshiba Solutions Corporation

Use of ICT*1 makes it possible to greatly improve the efficiency of business operation processes.

For example, in the home delivery business, delivery efficiency can be improved by integrating delivery sites, by formulating delivery area plans using electronic maps and by optimizing delivery routes. Improving the efficiency of delivery routes reduces not only CO2 emissions by 15% but also work loss.

ICT: Information and Communication Technology

[Image] Need to improve delivery workflow efficiency of the conventional mail and home delivery system

[Image] Improvement in operating process efficiency in the new mail and home delivery system

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Case Study: Saving electricity easily with Toshiba’s Eco-chip for reducing standby power to zero*

Toshiba Digital Products & Services Company

Unplugging unused electrical appliances allows one to reduce total power consumption by reducing standby power to zero. However, doing so also creates problems, such as rendering it impossible to record TV programs by timer. To resolve this difficulty, Toshiba has developed a low power consumption Eco-chip that makes it possible to disconnect AC power during standby and to reduce electrical devices’ standby power consumption to zero without unplugging the device via a remote controller. The Eco-chip will contribute to reducing the power consumption of electrical devices that consume large amounts of electricity during standby, such as TVs and DVD recorders.

[Image] Eco-chip

A mechanism that enables standby power consumption to be reduced to zero: 1.The large-capacity capacitor is charged during normal operation 2.When entering standby mode, the relay circuit disconnects the AC power, and the large-capacity capacitor supplies power only to the low power consumption Eco-chip to operate. 3.After about 12 hours of standby operation, the power circuit is initialized to recharge the large-capacity capacitor(*).

Recharging the large-capacity capacitor takes about five minutes and consumes 0.13 W of power.

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