Cycling operation of fossil plants

Technical Report · Wed May 01 00:00:00 EDT 1991

OSTI ID:5605490

Devendorf, D; Kulczycky, T G ^[1]

---

1. Niagara Mohawk Power Corp., Syracuse, NY (USA)

A necessity for many utilities today is the cycling of their fossil units. Fossil plants with their higher fuel costs are being converted to cycling operation to accommodate daily load swings and to decrease the overall system fuel costs. For a large oil-fired unit, such as Oswego Steam Station Unit 5, millions of dollars can be saved annually in fuel costs if the unit operates in a two-shift mode. However, there are also penalties attributable to cycling operation which are associated with availability and thermal performance. The objectives of Niagara Mohawk Power Corporation were to minimize the losses in availability and performance, and the degradation in the life of the equipment by incorporating certain cycling modifications into the unit. The objective of this project was to evaluate the effectiveness of three of these cycling modifications: (1) the superheater and turbine bypass (Hot Restart System), (2) the use of variable pressure operation, and (3) the full-flow condensate polishing system. To meet this objective, Unit 5 was tested using the cycling modifications, and a dynamic mathematical model of this unit was developed using the Modular Modeling System (MMS) Code from EPRI. This model was used to evaluate various operating modes and to assist in the assessment of operating procedures. 15 refs., 41 figs., 22 tabs.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA); Niagara Mohawk Power Corp., Syracuse, NY (USA); Foster Wheeler Energy Corp., Clinton, NJ (USA); Stone and Webster Engineering Corp., Boston, MA (USA)
• Sponsoring Organization: EPRI; Electric Power Research Inst., Palo Alto, CA (USA)
• OSTI ID: 5605490
• Report Number(s): EPRI-GS-7219-Vol.1
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
FOSSIL-FUEL POWER PLANTS
LOAD MANAGEMENT
BOILERS
ECONOMICS
EFFICIENCY
EQUIPMENT
HEAT RATE
NEW YORK
SERVICE LIFE
FEDERAL REGION II
MANAGEMENT
NORTH AMERICA
POWER PLANTS
THERMAL POWER PLANTS
USA
200600* - Fossil-Fueled Power Plants- Economic
Industrial
& Business Aspects- (1990-)
200104 - Fossil-Fueled Power Plants- Components