![]() ![]() The recirculation of anode off-gas is one method of achieving a large efficiency jump as it improves system fuel utilization. compared different concepts with and without anode off-gas recirculation. Their results show that electrical efficiency is up to 16% lower in systems with no anode off-gas recirculation. The most frequently chosen concepts for driving anode off-gas recirculation systems are the use of blowers and ejectors. AVL developed and manufactured a high-temperature prototype blower that operates at a maximum gas temperature of 600 C. The blower rotates at 120,000 rpm and has an efficiency of 50%. With this AVL's SOFC system reaches an electrical efficiency of around 50%. Versa Power Systems and FuelCell Energy have built an SOFC system with a high-temperature blower that handles gas temperatures of up to 700 C. Their SOFC module operates at a DC efficiency of 64%. presented an SOFC system with an electrical efficiency of 43%. This system has a power output of 7.1 kW and uses a high-temperature blower for recirculation. ![]() demonstrated a 300 W SOFC system with anode off-gas recirculation running on a propane-driven ejector. ![]() Journal of Power Sources 277 (2015) 251e260Ībbreviations A AC D DC m n O/C p RR SOFC T uĪrea alternating current diameter direct current mass flow rate molar flow rate oxygen-to-carbon ratio pressure recirculation ratio solid oxide fuel cell temperature velocityĪchieved an efficiency of 41%. ![]()
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