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Feature articles: Environment and energy technologies toward a green society: Environment and energy technologies toward a green society
Abstract
This article provides an overview of NTT Energy and Environment Systems Laboratories' research and development (R&D) objectives and initiatives to move the country toward a green society. Our ambitious R&D agenda is based on three key concepts-Green ICT, Green materials, and Governance by Green-with the goal of completely eliminating CO2 emissions and waste generated by the NTT Group's business activities by the year 2050.
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This article describes the development of a higher-voltage (approximately 400 V) direct current power feeding system for information and communications technology (ICT) equipment. It has higher efficiency than conventional alternating current systems, which can reduce the system cost. High-efficiency power feeding systems are an effective way to reduce ICT power consumption as well as low-powerconsumption ICT equipment such as routers and servers and high-efficiency cooling systems.
The Telecommunications Plant Materials Research Group was established in April 2008 with the goal of making telecommunications plant and maintenance technologies more environmentally friendly and reliable. Specifically, this new group is focusing on (1) developing criteria for deciding when to deploy, check, and upgrade telecommunication equipment, (2) clarifying the mechanisms involved in the breakdown and deterioration of materials, (3) developing technologies to enhance the environmentally friendly nature of plant and materials, and (4) developing ties with other laboratories and institutes working on similar materials-related research.
This article introduces the development of a solid oxide fuel cell (SOFC) stack with anode-supported cells. The SOFC can provide the highest electrical efficiency among all fuel cell types, and high electric efficiency leads to less CO2 produced during power generation.
Customer Premises DC Power Supply, Energy-saving Services, and Other Energy-saving Initiatives for General Households
- M Yamamoto
- T Babasaki