Kyocera develops solid-oxide fuel cell for institutional cogeneration

Kyocera Corp. announced the launch of the industry’s first 3 kW solid oxide fuel cell (SOFC) cogeneration system for institutional applications.

The system, which is available from this month in Japan, uses Kyocera‘s ceramic technologies to deliver 52 percent generation efficiency and an overall efficiency of 90 percent with exhaust heat recovery.

The new system integrates Kyocera’s cell stacks for the residential market. In addition to effectively generating energy by using these cell stacks, the system design enables the use of exhaust heat from the power generation process to heat water. These characteristics make the system well-suited for retail establishments and other commercial enterprises, including small restaurants.

Japan’s Ministry of Economy, Trade and Industry (METI) has set a residential-use fuel cell target of 1.4 million units by 2020, and 5.3 million units by 2030, as part of its vision for a hydrogen-based society. METI has supported the research and development of industrial-use SOFC systems with the goal of commercial availability during 2017.

The fuel cell system produces electricity and heat (hot water) by extracting hydrogen from utility-supplied gas or liquid petroleum (LP) gas and triggering reactions with oxygen in the air. Previous SOFC systems have also used ceramics as the electrolyte to recycle exhaust heat and achieve higher power generation efficiency but there has been a longstanding challenge with durability until Kyocera’s cell stacks.

Kyocera began developing proprietary ceramic technologies for SOFC applications in 1985. In 2011, the company began mass production of world-leading cell stacks for the residential-use “ENE-FARM type S.” A more efficient and compact cell stack launched in April 2016 serves as the foundation of the new 3kW SOFC system.

As a form of distributed power generation, SOFCs offer great potential to reduce energy losses associated with power transmission. Furthermore, the exhaust heat from power generating processes is effectively used for other purposes including heating water. The SOFC system offers substantial energy savings and lower CO2 emissions than conventional cogeneration systems using internal-combustion engines or gas turbines.


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