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- Title
Economic evaluation of A-USC power plant with CO<sub>2</sub> capture unit.
- Authors
Stępczyńska-Drygas, Katarzyna; Dykas, Sławomir; Łukowicz, Henryk; Czaja, Daniel
- Abstract
Achieving CO2 emission control while keeping electricity prices competitive is a key economic and technical challenge. The strategy for lowering CO2 emission from coal-based power plants includes primarily raising electricity generation efficiency. Currently, steam temperatures in ultra-supercritical (USC) power plants are limited to approximately 627°C by the use of the most advanced commercially available ferritic steels. To go to higher temperatures, high-nickel alloys must be used. Nickel alloys are at an advanced stage of development and are expected to become available to support the construction of a demonstration plant in Europe in 2021. For pulverized coal (PC) plants nickel alloy development means progressing to advanced ultra-supercritical (A-USC) steam conditions: 35 MPa/700/720°C. The concept consists of gradually raising the live steam temperature and pressure, but it can become economically unjustified. The coste Effectiveness of new investments can be provided only through a significant increase in the effciency of electricity generation. In this paper the economic evaluation of a 900 MW PC unit is presented. The main aim is to compare the cost of electricity generation in USC (28 MPa/600/620°C) and A-USC (35 MPa/700/720°C) power units. Variants with CO2 capture installation by chemical absorption MEA are considered. Compared to a USC design, the capital cost of the A-USC PC plant will be higher, but the operating cost lower. Owing to the higher efficiency of the A-USC plant, the differential in terms of operating cost increases as fuel price increases and CO2 cost charges are included.
- Subjects
COAL-fired power plants; CARBON sequestration; ELECTRIC power production; PUMPED storage power plants; PULVERIZED coal; THERMAL properties of steam
- Publication
Journal of Power Technologies, 2015, Vol 95, Issue 5, p75
- ISSN
2083-4187
- Publication type
Article