Energy Efficiency Analysis of Ultra-Supercritical Thermal Power Plant Based on Aspen Plus Modeling

At present, ultra-supercritical power plant is the most advanced technology, which can achieve ultra-low pollutant emissions and greatly improve the energy efficiency of power plants. From the perspective of energy balance and exergy balance, the normal and ultra-supercritical units are compared. In addition, the control variables method is used to observe the changes in boiler efficiency, power generation efficiency, barnstorming efficiency, and CO
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emissions of the entire thermal power plant by varying the exhaust temperature, supply fan inlet temperature, and main steam temperature. Besides, the energy-saving mechanism of ultra-supercritical thermal power generation is pointed out: Ultra-supercritical units have lower exhaust temperatures, higher supply fan inlet temperatures and higher main steam temperatures.