Tokyogasgroup csr report

Contribution to the Environment

Promotion of Smart Networks

Developing a sustainable society requires not only reducing CO2 emissions as has long been sought, but also society-wide action to conserve electricity and ensure energy security.
As one means of solving issues such as these, Tokyo Gas Group is promoting the development of "smart energy communities" to make smarter use of energy by connecting the buildings in a community via a heat and electric power network. At the same time, we are pursuing improvements at the building level to turn homes, office buildings, and factories into smarter energy users.

Creating Smart Energy Communities

Smart energy communities are created by developing smart energy networks (SENs). These combine a gas cogeneration system for generating and consuming heat and electricity locally with the use of renewable and untapped energy resources to create a heat and electricity network across which energy supply and demand is optimized by energy management using ICT. Making waste-free use of heat and electricity at the community level in this way serves to raise energy efficiency in the community as a whole, allows business activities and everyday life to be sustained in the event of a power outage, and enhances cities' value.

Energy-smart community development is spreading throughout the Tokyo metropolitan area, further propelled by central and local government policies.
 

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▶ Contribution to Local Communities / Safe and Secure Ways of Life and Urban Development

DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Making Life Smarter

To promote smarter energy use in everyday life, we built an employee dormitory in Isogo-ku, Yokohama, that makes maximum use of renewable energy and distributed energy systems, and conducted demonstration tests there for three years from April 2012 to March 2015.

The tests involved sharing energy at the housing complex level and operating systems efficiently by means of integrated control. Residents were encouraged to save energy by providing incentives and by enabling them to keep track of their energy usage at a glance by means of a home energy management system (HEMS). The tests confirmed the energy-saving effect of these measures in resident-occupied areas. Demand response using ENE-FARM and storage battery cell systems was also tested under real-world conditions designed to replicate power shortages at the local level.*

The project achieved an approximately 30% reduction in energy consumption and a 38% reduction in CO2emissions overall thanks to the installation and efficient use of ENE-FARMs and other equipment. We also achieved a 7% energy saving in resident-occupied areas as a result of changes in resident behavior brought about by the installation of HEMS. In addition, peak load was cut by 58% in summer and 49% in winter as a result of demand response.

* This is a means of adjusting electricity demand on the user side in response to a request to limit power use. Supply and demand for heat and electricity in an entire residential building is controlled by an integrated control system. When a demand response signal is received from the local energy management system during peak load periods, the system tells the building's ENE-FARM fuel cells to maximize output. At the same time, individual households are asked to conserve electricity by the home energy management system.

Isogo Smart House Demonstration Project
Isogo Smart House Demonstration Project 
A 24-unit Tokyo Gas employee dormitory consisting of four stories above ground and a basement. It was also used for the FY2011 Next-Generation Energy and Social Systems Demonstration Project and the FY2010 MLIT House and Building CO2 Reduction Pioneer Project.


Housing Complex Smart House Demonstration Project
Housing Complex Smart House Demonstration Project
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Promotion of Smart Office Buildings and Factories

We are pursuing ways of enabling visual tracking of energy usage in office buildings, factories, and other facilities by using building energy management systems (BEMS) and smart meters. We are also working to enhance energy services to enable, for example, optimized operation and control of cogeneration systems, renewable energy, air conditioners, and boilers in order to reduce energy consumption and CO2 emissions at customers' sites.

Schematic of an Energy Smart Commercial Building
Schematic of an Energy Smart Commercial Building


Visual tracking of energy use by TG Green Monitors
The TG Green Monitor service provides data on energy use measured at the customer's end by displaying it using easily understood graphs and other visual aids. Customers access the service via a special section of our website. Providing customers with an easy means of tracking their energy usage is an effective way of encouraging them to save energy.

Typical TG Green Monitor Screenshot
Typical TG Green Monitor Screenshot


Saving energy and electricity at commercial buildings with Raku-Sho BEMS
Raku-Sho (Easy Conservation) BEMS ("the winning way to save energy") is a service launched in fiscal 2013 by which Tokyo Gas monitors customers' equipment and energy usage to help them save energy and electricity. This system centrally manages the operation of electrical facilities (air conditioning, ventilation, lighting, etc.) and gas equipment (GHPs, natural chillers, boilers, etc.) at primarily small and mediumsized commercial facilities, helping them to save energy and conserve electricity. Control of GHP, ventilation systems, and other equipment has led to energy savings at customer facilities (commercial multitenant buildings) where Raku-Sho BEMS is used, reducing gas consumption by approximately 11% and electricity consumption by approximately 4%. Customers have also been able to cut their peak demand by approximately 6% (as of March 2017).

Typical Energy Savings Achieved by Using Raku-Sho BEMS at a Customer Facility (Commercial Multi-Tenant Building)

Typical Energy Savings Achieved by Using Raku-Sho BEMS at a Customer Facility (Commercial Multi-Tenant Building)

Example of a Raku-Sho BEMS System

Example of a Raku-Sho BEMS System
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Safe and Secure Ways of Life and Urban Development

Promotion of Smart Networks Built around Cogeneration Systems
We are pursuing the development of "smart energy communities" that use energy smarter by connecting buildings in the community with a heat and electric power network. Communities can be made "energy smart" by building smart energy networks (SENs), which link supply and demand in a community into a single heat and power network based around a gas cogeneration system (CGS). Energy supply and demand throughout the network are optimized by an energy center, which precisely manages the network's heat and power use. By using such networks to provide low-carbon, disaster-resilient energy tailored to local characteristics, we will contribute to making communities both more environmentally friendly and resilient to disasters.
 

Work started in Block II-2 (West area) in the northern district adjacent to Tamachi Station's east exit
Tokyo Gas Group is developing an SEN in the northern district adjacent to Tamachi Station's east exit (East area in Minato-ku, Tokyo) in partnership with the Minato ward authorities with the goal of reducing the area's carbon footprint and making it more disaster resilient. Supplies of heat and power have been progressively rolled out to three facilities - Minato Park Shibaura (a public facility), Aiiku Hospital, and a childcare support facility - since November 2014. The project is the first new urban development project in Japan to incorporate development of an SEN. In October 2015, work started on the TGMM Shibaura Project (provisional name) in Block II-2 (West area) in the northern district adjacent to Tamachi Station's east exit. This project will create a multipurpose business center on land owned by the company, and we plan to build a second smart energy center for the new center to be operated in tandem with the first as the district undergoes further development, thereby reducing CO2 emissions in the entire northern district adjacent to Tamachi Station's east exit by some 45% relative to 1990.

Key Advantages of SEN in the Northern District Adjacent to Tamachi Station East Exit

Linkages among multiple facilities with different purposes Public facility, hospital, etc.
Maximum adoption and effective use of renewables, untapped energy, etc. Use of solar heat and heat of underground tunnel water for air conditioning (first application in Japan for district heating)
Contribution to BCP Capable of uninterrupted power supply to disaster management base (Minato Park Shibaura) and uninterrupted heat supply to Aiiku Hospital during power outages
Optimal supply/demand control by SENEMS Optimization for area-wide heat and power according to outside air conditions and energy usage (first in Japan)

Smart Energy Network in the Northern District Adjacent to Tamachi Station's East Exit
Smart Energy Network in the Northern District Adjacent to Tamachi Station's East Exit
 
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.