High-temperature Fuel Cell Cchp Total Energy System Analysis,

One of the biggest challenges for all of the countries around the world is the rapid increase in energy consumptions and the serious environment deterioration on the global. It is a crucial issue to significantly improve the total energy utilization efficiency and to reduce the global pollutions. A Total Energy System (TES) is an integrating energy system that simultaneously supplies the power generation and heating/cooling based on cascade utilization of energy, which significantly enhances the energy efficiency and reduces the pollution emissions to the environment.Currently, the power generation equipment employed for TES mainly includes the Micro Gas Turbines (MGT), Internal Combustion Engines (ICE), and High Temperature Fuel Cells (HTFCs). High temperature fuel cells (HTFCs, i.e. MCFC and SOFC) have the advantages of high power generation efficiency, high exhaust temperature, and environmental benignity. The high exhaust temperature (above 400℃) of HTFCs makes them quite suitable for driving the absorption refrigeration in the TES. As a result, it is of great significance and wide application perspective to research and develop the TES based on HTFCs.An HTFC-TES is proposed based on the China's energy sources situation and the energy consumption characteristics of the large buildings after a briefly review on the development history of the TES technology and an analysis on the development potential of TES in China.A new cooling, heating and power cogeneration system is proposed based on the MCFC and the absorption refrigeration by using the waste gas exhausted from the high temperature fuel cells to drive the absorption refrigeration. In addition to supplying electricity, the new system can provide a large building with air-conditioning in summer and heating in winter. The energy balance and exergy analysis of the system shows that the overall energy utilization efficiency of the proposed cogeneration system is...