Tokyogasgroup csr report

Contribution to the Environment

Measures at the City Gas Production and Supply Stages

Measures at the City Gas Production and Supply Stages

Natural gas extracted abroad is liquefied at -162°C and transported by tanker as LNG (liquefied natural gas), with a volume that is one-600th of the gaseous form. Tokyo Gas produces city gas at the Negishi, Sodegauwa, Ohgishima and Hitachi LNG terminals, and we supply city gas by ensuring the terminals back each other up.
Since little energy is used, the energy efficiency in producing city gas from LNG stands at 99% or more. Energy loss is also extremely slight in city gas supply because it is transmitted directly through pipelines to consumption areas.
We are making further efforts to save energy, such as by using LNG cold energy.

Ohgishima LNG Terminal
Ohgishima LNG Terminal

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.

Using LNG Cold Energy

Third-party Assured
Using cold energy of -162°C LNG at various temperatures, we engage in cryogenic power generation, operate cold storage warehouses and produce dry ice. The Negishi LNG Terminal depends on cryogenic power generation for about 38% of its power consumption. In fiscal 2017, it generated 32,024 MWh of electricity, using cold energy of LNG, and reined in CO2 emissions by about 22,000 tons.

Cold Energy Use (FY2017)
Purpose LNG Used for Cold Energy (1,000 tons)
Supplied to subsidiaries 820
Electricity generated using cold energy 787
BOG*, other 1,283
Total 2,890
*Boil-off gas is generated by evaporation of LNG due to heat entering tanks.
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.

Measures to Reduce Methane Emissions

Methane accounts for less than 1% of the Tokyo Gas Group’s greenhouse gas emissions. It is released mainly during city gas production and gas pipeline construction work. The Group strives to further reduce methane emissions by, for example, cutting the amount of sampling gas used in analyzing produced gas, preventing venting during the shutdown of a calorific value adjustment system, planning pressure reductions to curb methane emissions into the atmosphere during pipeline construction work, and developing gas absorption and recovery systems.
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.