Tokyogasgroup csr report

Decarbonization through Energy Supply

Expanding the Use of Highly Efficient Residential Gas Appliances and Systems

Tokyo Gas develops and promotes kitchen stoves fit with highly efficient burners, highly efficient water heaters that recover latent heat, and residential power generation systems that utilize exhaust heat.

Popularization of Highly Efficient Kitchen Stoves

In 1998, Tokyo Gas began selling a kitchen stove equipped with highly efficient burners that allow less heat to escape from the bottom of the pan. We made efforts to spread the product, and almost all stoves were equipped with this type of burners by 2006. The high-efficiency burner excels in energy conservation and helps reduce CO2 emissions from households. At the same time, it is safer and easier for the users since the flames are less likely to spill out from under the pan, even when the flame level is raised.
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.

Popularization of Highly Efficient Eco-JOES Water Heaters

While conventional residential gas water heaters have a maximum heating efficiency of 83%*1, the Eco-JOES highly efficient, home-use water heaters are equipped with an exhaust heat and latent heat recovery system that boosts efficiency to as high as 95%*2. Assisted by the industry-wide Eco-JOES Adoption Campaign to promote the introduction of Eco-JOES, the number of residential installations is rising every year. As of the end of March 2018, shipments reached about 8.29 million units in Japan, according to data compiled by the Japan Industrial Association of Gas and Kerosene Appliances.

Due to their efficient use of heat, the Eco-JOES water heaters reduce exhaust heat into the air and help reduce CO2 emissions and combat global warming as well. Their remote control devices incorporate the EneLook*3 function, which displays gas and hot waterusage information, as a visualization function that motivates users to save water and energy.

How the Eco-JOES highly efficient water heaters work

How the Eco-JOES highly efficient water heaters work

  • *1  For RUF-A2405AW(B), a conventional water heater.
  • *2  For F-E2405AW(A), an Eco-JOES model. Calculations for both *1 and *2 were made using the JIS S 2109-stipulated methods.
    (However, heating efficiencies depend on the conditions of use.)
  • *3  Some remote controllers do not support EneLook.
 

Blue & Green Project: Popularizing Highly Efficient Gas Appliances and Planting Trees

Tokyo Gas, along with other members of the gas industry, participates in the Blue & Green Project organized by the Center for Better Living to promote the use of gas water heaters and room heaters that offer energy savings and benefits for the betterment of society. Under the project, we have sought to popularize our highly energy-efficient ENE-FARM and Eco-JOES in combination with tree planting activities since June 2006 so we can hand over a verdant planet to the next generation.
During the first phase, we planted one tree for each unit of target appliances sold in Vietnam. We planted about 3.9 million trees over the ten-year project, which was recognized with a certificate of gratitude from the Vietnamese government.
Since April 2014, we have been supporting reforesting activities in Rikuzentakata City in Iwate Prefecture to restore the pine forest of Takata-Matsubara, which had been destroyed by the Great East Japan Earthquake. Following experimental planting, full-scale reforestation began in fiscal 2017, and a total of around 10,000 pines will be planted over a three-year period. We will continue to promote the sale of highly efficient appliances while offering support to reviving the natural environment and historical features of areas affected by the earthquake.
 

Tree planting test  in Takata-Matsubara

Tree planting test in Takata-Matsubara
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.

Residential CHP Systems

Residential power generation employs combined heat and power (CHP) systems that had been primarily used at large plants and buildings. This energy-saving system extracts two types of energy from one energy source by effectively using heat generated as a byproduct of producing electricity. The system also generates a sense of delight through the value of generating power at home. At the same time, it helps reduce energy consumption and CO2 emissions.

Saving Energy and Curbing CO2 Emissions through Residential Power Generation

Energy that can be directly collected in nature is called as primary energy, while energy such as electricity, generated through the use of primary energy, is defined as secondary energy. Properly assessing energy conservation and measures to fight global warming requires taking into account changes in primary as well as secondary energy. Since residential power generation takes place where electricity is also consumed, exhaust heat can be used for such purposes as heating water, which is not always possible at thermal power stations.

Residential CHP System (overview of the system for the Panasonic ENE-FARM 2019 model)

Residential CHP System (overview of the system for the Panasonic ENE-FARM 2019 model)

  • Note:  Hot water used for reheating bathwater and heating rooms is generated by a backup power source. In some models, exhaust heat is reused for underfloor heating and reheating bathwater.

ENE-FARM Residential Fuel Cell CHP System

In May 2009, we introduced the world’s first fuel cell combined CHP system for detached housings, called the ENE-FARM, as a result of collaboration with Matsushita Electric Industrial Co., Ltd. (now Panasonic Corporation).
In April 2017, we launched the resilient model, which incorporates a continuous power generation function that allows residents to use lighting and communication equipment during power outages caused by natural disasters. In this model, the system continues to supply electricity even during a power outage as long as ENE-FARM is generating power. Maximum output is approximately 500 W and lasts for eight days. Residents can draw electricity from a special outlet reserved for use during a power outage. The system is expected to contribute to meeting the growing social need to enhance energy security.
Furthermore, a network access service that started in August 2017 now allows users with an Anata-to-Enepa smartphone application to obtain information on ways to use energy efficiently as well as turn their bath or underfloor heating on or off from outside their home, check the status of power generated by ENE-FARM, and view household energy consumption. Users will also be able to remotely update their ENE-FARM software over the Internet, while maintenance staff will be able to remotely monitor the status of malfunctioning appliances, which provides a greater sense of security when using the system.
 

App screen showing electricity, gas and hot water usage

App screen showing electricity,
gas and hot water usage

Enepa app’s message window

Enepa app’s message window

ENE-FARM residential fuel cell CHP system (for detached houses, manufactured by Panasonic Corporation)

ENE-FARM residential fuel cell CHP system
(for detached houses, manufactured by Panasonic Corporation)
 

Remote controller display for checking energy use status

Remote controller display for checking energy use status

Active Utilization of Solar Energy

For household use, Tokyo Gas proposes dual power generations, one of which combines solar photovoltaic power generation and the ENE-FARM, and the other is the SOLAMO and Eco-JOES, which combines solar heating and highly efficient water heater. Each combination significantly reduces a household’s environmental impact and works as a backup system required to actively utilize solar energy, to stabilize the fluctuated output of secondary energy.

Dual Power Generation by Solar Power and the ENE-FARM

Dual Power Generation by Solar Power and the ENE-FARM

  • Note:  The solar photovoltaic power generation system is not a Tokyo Gas product.
 

Gas water heating system based on solar heat that uses solar energy to boil water (SOLAMO)

Gas water heating system based on solar heat that uses solar energy to boil water (SOLAMO)

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.