PERFORMANCE EVALUATION OF SOLID OXIDE FUEL CELL (SOFC) INTEGRATION IN COMBINATION WITH WATER HEATER GAS FOR WASTE HEAT RECOVERY

• Main Author: Nurfauzi Rizal, Muhammad
• Format: Theses
• Language: Indonesia
• Subjects: Teknik kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/74375
• Institution: Institut Teknologi Bandung

Solid oxide fuel cell (SOFC), a fuel cell using solid oxide electrolyte, is one of the promising developments in the fuel cell system. The intermediate-temperature SOFC (IT-SOFC), operated at 600–800oC, gives a wide range of materials, a low corrosion rate of metallic components, improved durability, and more robust construction. The IT-SOFC materials that can be used and easily found in Indonesia are NiO-CSZ, calcia-stabilized zirconia (CSZ), and calcium cobalt zinc oxide (CCZO), which can be utilized as the anode, electrolyte, and cathode, respectively. Because of the incomplete steam reforming and electrochemical reactions, there is residual fuel in the exhaust gases from the anode of SOFC, which is usually burned in an afterburner, this combustion heat can be used for preheating the fuel and air but still a significant amount of thermal energy is rejected to the environment. In this research, SOFC will be combined with water heater gas (WHG) as an application of combined heat and power (CHP) to recover the waste heat from the SOFC system with specific emphasis on the electricity generated by SOFC to accommodate fast charging for smartphones and produce hot water with a variety of fuel (hydrogen, natural gas, and LPG). The highest maximum power density produced by a single anode support SOFC cell is 1.31 mW/cm2 with LPG fuel. The highest capacity of hot water produced is 1.903 LPM with natural gas fuel. The highest total system efficiency (CHP efficiency) for the integration combination of SOFC-WHG is 79.73% with natural gas fuel. The number of cells needed to accommodate fast charging for smartphones with the power density produced by SOFC is 4020 cells.