Design of Advanced Fossil-Fuel Systems (DAFFS): A Study of Three Developing Technologies for Coal-Fired, Base-Load Electric-Power Generation. Summary Report

摘要

The work carried out, plus contributions from reviewers, provide a broad, but sometimes conflicting, basis for the technology characterization in the DAFFS study. The conceptual designs required many judgments and estimates that may influence performance levels and cost projections. These factors must be remembered when reviewing the following observations: (1) Each base case concept included in the three technologies (PCF, PFB and IGCC) could be cost-competitive under some set of reasonable economic conditions. The sensitivity and uncertainty analysis indicate significant overlaps of the cost uncertainty hands for the various concepts. (2) Each of the technologies has the potential for sulfur removal level of 95% in plants using high-sulfur coal; however, the cost of achieving 95% removal must be demonstrated. (3) The IGCC base case concepts produce approximately one-half the solid wastes of the PCF and PFB base case concepts. (4) Because the largest amount of land use is for the plant railroad access, environmental buffer zone, and coal handling facilities, land requirements are about the same (+- 12%) for all concepts. (5) While options with respect to steam conditions are available for PCF plants, there are no technical issues in the non-FGD portion of the plant that significantly affect the cost and performance. Several issues remain regarding the advanced FGD systems. (6) The PFB and IGCC concepts have yet to be scaled up to commercial size and operated within a utility system. (7) Although the DAFFS study applied a reasonable set of ground rules and generic assumptions, plant comparison and selection decisions made by utilities will involve an integrated set of additional conditions. (ERA citation 08:045978)