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Title: Cycling operation of fossil plants

Abstract

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 tomore » assist in the assessment of operating procedures. 15 refs., 41 figs., 22 tabs.« less

Authors:
;  [1]
  1. Niagara Mohawk Power Corp., Syracuse, NY (USA)
Publication Date:
Research Org.:
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 Org.:
EPRI; Electric Power Research Inst., Palo Alto, CA (USA)
OSTI Identifier:
5605490
Report Number(s):
EPRI-GS-7219-Vol.1
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Devendorf, D, and Kulczycky, T G. Cycling operation of fossil plants. United States: N. p., 1991. Web.
Devendorf, D, & Kulczycky, T G. Cycling operation of fossil plants. United States.
Devendorf, D, and Kulczycky, T G. 1991. "Cycling operation of fossil plants". United States.
@article{osti_5605490,
title = {Cycling operation of fossil plants},
author = {Devendorf, D and Kulczycky, T G},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/5605490}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed May 01 00:00:00 EDT 1991},
month = {Wed May 01 00:00:00 EDT 1991}
}

Technical Report:
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