Derate Mitigation Options for Pulverized Coal Power Plant Carbon Capture Retrofits
Carbon capture and storage (CCS) technologies available in the near-term for pulverized coal-fueled power plants (i.e., post combustion solvent technologies) require substantial capital investment and result in marked decrease in electricity available for sale to the grid. The impact to overall plant economics can be mitigated for new plant designs (where the entire plant can be optimized around the CCS system). However, existing coal-fueled power plants were designed without the knowledge or intent to retrofit a CCS process, and it is simply not possible to re-engineer an existing plant in a manner that it could achieve the same performance as if it was originally designed and optimized for CCS technology. Pairing an auxiliary steam supply to the capture system is a technically feasible option to mitigate the derate resulting from diverting steam away from an existing steam turbine and continuing to run that turbine at steam flow rates and properties outside of the original design specifications. The results of this analysis strongly support the merits of meeting the steam and power requirements for a retrofitted post-combustion solvent based carbon dioxide (CO2) capture system with an auxiliary combined heat and power (CHP) plant rather than robbing the base plant (i.e., diverting steam from the existing steam cycle and electricity from sale to the grid).
- Research Organization:
- National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- OSTI ID:
- 1441383
- Report Number(s):
- NETL-PUB-20304
- Resource Relation:
- Journal Volume: 114; Conference: 13th International Conference on Greenhouse Gas Control Technologies. Lausanne, Switzerland, November 2016
- Country of Publication:
- United States
- Language:
- English
Similar Records
Enabling Staged Pressurized Oxy-Combustion: Improving Flexibility and Performance at Reduced Cost
California CO2 Storage Assurance Facility Enterprise (C2SAFE): Final Technical Report