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
Blue & Green Project: Popularizing Highly Efficient Gas Appliances and Planting TreesTokyo 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.
Tree planting test in Takata-Matsubara
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 GenerationEnergy 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)
ENE-FARM Residential Fuel Cell CHP SystemIn 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).
App screen showing electricity,
Enepa app’s message window
ENE-FARM residential fuel cell CHP system
Remote controller display for checking energy use status
Active Utilization of Solar EnergyFor 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
■Gas water heating system based on solar heat that uses solar energy to boil water (SOLAMO)