| How to produce energy by clean, efficient and environmentally friendly means is a major challenge for today’s scientists. A fuel cell is an energy device that converts the chemical energy of a fuel into electrical energy directly. Compared to conventional heat engines, fuel cells do not need to burn and are not constrained by the Carnot cycle. This makes the fuel cell not only green and can achieve higher power generation efficiency. The static nature of the fuel cell also means quiet operation without noise or vibration. Fuel cells can be used not only as batteries for small electronic products, but also as a centralized power supply system. In short fuel cells provide cleaner, more efficient, and perhaps the most flexible chemical and electrical conversion by the attention of various countries.This paper focuses on the establishment of a universal thermodynamic model to calculate the maximum efficiency of different fuels under different conditions.The main content of each chapter is divided into four chapters. The main contents are as follows:The first chapter introduces the research background, classification and development history of fuel cell, and then introduces the basic principle of fuel cell.Finally, the structure and materials of solid oxide fuel cell (SOFC) are summarized.In the second chapter, the reforming reaction of hydrocarbon fuel is introduced from the chemical equilibrium state, the polynomial expansion coefficient of each thermodynamic quantity is fitted, and the reforming reaction of methane is calculated.In chapter 3, the analytic expression of the maximum electric efficiency of hydrocarbon fuel cell is deduced based on the self-heating thermodynamics model.By calculating the maximum electric efficiency available for fuel cells with methane and propane as fuel, the fuel efficiency is analyzed. Rate, temperature, water to carbon ratio, heat exchange efficiency on the electrical efficiency.The fourth chapter summarizes the whole thesis. |
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