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Friday, April 18, 2008
Panasonic Develops New Fuel Cell Cogeneration System for Home Use


Panasonic has developed a home-use polymer electrolyte fuel cell (PEFC) cogeneration system featuring the world's highest power-generating efficiency of up to 39% Lower Heating Value(LHV), durability of 40,000 operation hours and 4,000 start-stop times, and a predicted lifetime of over 10 years.

Cogeneration (also combined heat and power, CHP) is the use of a heat engine or a power station to simultaneously generate both electricity and useful heat.

The home-use fuel cell cogeneration system is planned for early commercialization as a next-generation energy supply system.

When installed in an ordinary household, the new system can reduce primary energy consumption by 22% (about 1.4 times more than the conventional system) and can cut CO2 emissions by 12% based on the basic unit for all power sources, the Japanese company claims. "With year-round operation, it can save 3,262 kWh of primary energy and reduce CO2 emissions by 330 kg. The new system can reduce CO2 emissions by 37% based on the basic unit for thermal power source. With year-round operation, it can cut CO2 emissions by 1,175 kg," Panasonic added.

Three-year field tests found that the system was often operated in a power output range between 500 W and 1 kW in ordinary households. Within this practical use range, the new system has achieved drastically improved power-generating efficiency compared to conventional systems. The Panasonic system has achieved the world's highest power-generating efficiencies 39% (LHV) at 750 W; 38% or higher in the 500 W-1 kW range and 34% at 300 W. The system has also satisfied durability requirements for home-use equipment.

In the conventional system, the fuel processing device is not as efficient and inverter efficiency drops toward its lower output ranges. As a result, the power-generating efficiency of the conventional system is the highest at its higher ratings, and falls with decreasing output.

Panasonic has made the system feasible by using cell stack technology that employs durable Membrane Electrode Assemblies (MEA), fuel processing technology that allows stable operation in a wide range at high efficiency and low-loss boost inverter technology.

Panasonic will install production equipment for the new system in its plant in Kusatsu City, Shiga Prefecture, and will start manufacturing from June this year. In fiscal 2010, further investments will be made to start a full-scale commercialization of this system as a new environmental business that creates a new energy source.


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