Chemical , fuel conversion

Plasma-Chemical Fuel Conversion and Hydrogen Production... 

The fact that thermodynamically, some of the heat generated in the electrochemical reaction can be reinvested into the chemical fuel conversion explains that SOFC have the potential to reach a net electrical system efficiency above 60% with natural gas fuel [14]. In a combined cycle system, where the exhaust gas from the high-temperature fuel cell is used to drive a gas turbine, the overall system electrical efficiency may even reach over 70% [15]. The efficiencies of gas turbines and diesel engines decrease at part load, whereas the efficiency of the fuel-cell-based systems will be almost independent of part load up to very high turndown ratios [14]. 

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