■Broadening smart energy networks
* The Senju SEN project is scheduled to be wound up at the end of September 2017.
The development of more environmentally friendly, disaster resilient communities leveraging the advantages of gas cogeneration is made possible by systems called “smart energy networks,” or SENs for short. These systems optimize energy use by creating a community-wide electricity and heat network that has a gas cogeneration system at its core. This is augmented by making maximum use of renewables and unused energy resources and utilizing information and communications technology (ICT) to appropriately manage energy (including on the demand side). This also improves disaster resilience and so enhances the value that cities offer. SENs are now being developed in redevelopment zones and other areas in the Greater Tokyo Area. One of these is the Tamachi SEN, which was awarded the Minister of Economy, Trade and Industry Award for joint projects
in the Successful Case of Energy Conservation category at the Energy Conservation Grand Prize Awards in fiscal 2016.
■SEN development in the Toyosu wharf district
Tokyo Gas Group is pursuing urban development with the potential to last well into the 22nd century in a redevelopment area located around land the Group holds in the Toyosu wharf district of Tokyo's Koto-ku. This is a project called "Tokyo Smart City TOYOSU 22." Under this project, we are undertaking futuristic urban development guided by three conceptions of "smartness" - "smart energy," "smart green," and "smart community," from a long-term perspective looking beyond the Tokyo 2020 Olympics and Paralympics, which is a high-quality development to raise the value and appeal of the area.
TOYOSU 22 Urban Development Concept
In May 2016, we completed construction of a smart energy center in Zone 4 (see figure below), owned by Tokyo Gas Site Development Co., Ltd., in preparation for development of a SEN in the Toyosu wharf district. This is the second SEN to be developed by Tokyo Gas in an urban redevelopment district, the first being a SEN in the northern district adjacent to Tamachi Station's east exit. The newly completed smart energy center will be equipped with one of the world's most efficient gas cogeneration systems, which will supply electric power to the Toyosu wholesale market while waste heat is used by the center itself. Environmental friendliness will be enhanced by adopting gas pressure differential power generation using gas supply pressure. By giving the CGS blackout start functionality,*1
laying independent power lines,*2
and employing disaster-resistant medium-pressure gas pipelines, we will create a system that is capable of supplying uninterrupted heat and electricity even during power outages or other emergencies, thus enhancing the district's disaster resilience. The network will also have a "SENEMS"*3
for centrally managing and controlling energy throughout the district using ICT. This will make it possible to optimally control heat sources and visually track energy usage, thereby contributing to greater environmental awareness among building users. We plan to progressively expand the heat and power network as development of Zones 4 and 2 progresses.
*1Capability to independently restart the generator during a power outage.
*2Power lines laid independently by an operator. They can be used at a customer's discretion when grid power has been interrupted.
*3Smart Energy Network Energy Management System.
Toyosu Wharf District Development Area
Tokyo Gas's Toyosu Smart Energy Center
■Japan’s first SEN to also serve neighboring existing facilities Nihonbashi Muromachi
A large high-efficiency gas cogeneration system has been installed in the redevelopment zone in Nihonbashi Muromachi 3-chome to serve as an independent distributed power source. This will supply electricity and heat to existing office buildings and commercial facilities in the surrounding area as well as within the redevelopment zone, making it the first such project in Japan. New projects of this kind will encourage the area-wide adoption of smart energy technologies and also contribute to the development of dramatically more disaster resilient cities. This particular project is being run by Mitsui Fudosan TG Smart Energy, Inc. (a joint venture formed by Mitsui Fudosan and Tokyo Gas) and it is expected to be completed in March 2019.
■Participation in Yokohama's Tsunashima-Higashi Smart Town Project
Tokyo Gas Group is pursuing a number of projects (including development of an energy center) in Tsunashima Sustainable Smart Town, a next-generation urban smart city that is to be developed on the former site of a Panasonic factory in the Tsunashima-higashi district of Kohoku-ku in Yokohama, Kanagawa Prefecture. The first energy services came on stream in December 2016, and they are now being progressively expanded. The plan is to develop energy supply systems based on an advanced model for sharing heat and power supplies to diverse facilities over a more compact area than in the past. We will improve supply continuity by installing a gas cogeneration system in the town energy center and using multiple power sources and disaster-resistant medium-pressure gas lines, while the use of more efficient equipment and area-wide energy utilization will also improve environmental friendliness. And lastly, the delivery of energy services will ensure the financial viability of these improvements in supply stability and environmental friendliness.
Artist's impression of town energy center