Commercial second-generation PFBC plant transient model: Task 15

Technical Report · Sat Apr 01 04:00:00 EST 1995

DOI:https://doi.org/10.2172/161472· OSTI ID:161472

White, J S; Getty, R T; Torpey, M R

The advanced pressurized fluidized bed combustor (APFBC) power plant combines an efficient gas-fired combined cycle, a low-emission PFB combustor, and a coal pyrolysis unit (carbonizer) that converts coal, America`s most plentiful fuel, into the gas turbine fuel. From an operation standpoint, the APFBC plant is similar to an integrated gasification combined cycle (IGCC) plant, except that the PFBC and fluid bed heat exchanger (FBHE) allow a considerable fraction of coal energy to be shunted around the gas turbine and sent directly to the steam turbine. By contrast, the fuel energy in IGCC plants and most other combined cycles is primarily delivered to the gas turbine and then to the steam turbine. Another characteristic of the APFBC plant is the interaction among three large thermal inertias--carbonizer, PFBC, and FBHE--that presents unique operational challenges for modeling and operation of this type of plant. This report describes the operating characteristics and dynamic responses of the APFBC plant and discusses the advantages and shortcomings of several alternative control strategies for the plant. In particular, interactions between PFBC, FBHE, and steam bottoming cycle are analyzed and the effect of their interactions on plant operation is discussed. The technical approach used in the study is described in Section 2. The dynamic model is introduced in Section 3 and described is detail in the appendices. Steady-state calibration and transient simulations are presented in Sections 4 and 5. The development of the operating philosophy is discussed in Section 6. Potential design changes to the dynamic model and trial control schemes are listed in Sections 7 and 8. Conclusions derived from the study are presented in Section 9.

• Research Organization: Gilbert/Commonwealth, Inc., Reading, PA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC21-89MC25177
• OSTI ID: 161472
• Report Number(s): DOE/MC/25177--5034; ON: DE96000570
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
CHARS
COAL
COMBINED-CYCLE POWER PLANTS
DESIGN
ENGINEERING DRAWINGS
FLUIDIZED BED HEAT EXCHANGERS
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
GAS TURBINES
MATHEMATICAL MODELS
NUMERICAL DATA
OPERATION
PRESSURIZATION
PYROLYSIS
RESPONSE FUNCTIONS