Induced Draft Fan Innovation for Heat Recovery Steam Generators

1993 ◽  
Author(s):  
O. W. Beasley ◽  
E. C. Hutchins ◽  
P. R. Predick ◽  
J. M. Vavrek
Keyword(s):  
Heat Recovery ◽  
Lessons Learned ◽  
Steam Generation ◽  
Steam Generators ◽  
Traditional Design ◽  
Engineering Study ◽  
Forced Draft ◽  
Induced Draft Fan ◽  
Duct Burner ◽  
Design Cost

A first of its kind, induced draft (ID) heat recovery steam generators (HRSG) have been in service at a cogeneration facility since 1991. A preliminary engineering study considered a forced draft (FD) fan to supply combustion air to the HRSG duct burners (when the combustion turbine (CT) is out of service) as a traditional design; however, the study indicated that the FD fan may require the HRSG duct burner to be shut off following a CT trip and reignited after the FD fan was in service. Although the induced draft HRSG design cost more than the FD fan design, the induced draft design has improved the cogeneration facility’s steam generation reliability by enabling the HRSG to remain in service following a CT trip. This paper briefly summarizes the preliminary engineering study that supported the decision to select the ID fan design. The paper also discusses the control system that operates the fresh-air louvers, duct burners, HRSG and ID fan during a CT trip. Startup and operating experiences are presented which demonstrate the effectiveness of the design. Lessons learned are also summarized for input into future induced draft HRSG designs.

Induced Draft Fan Innovation for Heat Recovery Steam Generators

1994 ◽  
Vol 116 (2) ◽  
pp. 402-405
Author(s):  
O. W. Beasley ◽  
E. C. Hutchins ◽  
P. R. Predick ◽  
J. M. Vavrek
Keyword(s):  
Heat Recovery ◽  
Lessons Learned ◽  
Steam Generation ◽  
Steam Generators ◽  
Traditional Design ◽  
Engineering Study ◽  
Forced Draft ◽  
Induced Draft Fan ◽  
Duct Burner ◽  
Design Cost

A first of its kind, induced draft (ID) heat recovery steam generators (HRSG) have been in service at a cogeneration facility since 1991. A preliminary engineering study considered a forced draft (FD) fan to supply combustion air to the HRSG duct burners (when the combustion turbine (CT) is out of service) as a traditional design; however, the study indicated that the FD fan may require the HRSG duct burner to be shut off following a CT trip and re-ignited after the FD fan was in service. Although the induced draft HRSG design cost more than the FD fan design, the induced draft design has improved the cogeneration facility’s steam generation reliability by enabling the HRSG to remain in service following a CT trip. This paper briefly summarizes the preliminary engineering study that supported the decision to select the ID fan design. The paper also discusses the control system that operates the fresh-air louvers, duct burners, HRSG, and ID fan during a CT trip. Startup and operating experiences are presented that demonstrate the effectiveness of the design. Lessons learned are also summarized for input into future induced draft HRSG designs.

scholarly journals General Design Considerations for Gas Turbine Waste Heat Steam Generators

1968 ◽  
Author(s):  
W. V. Hambleton
Keyword(s):  
Gas Turbine ◽  
Heat Recovery ◽  
Waste Heat ◽  
Steam Generation ◽  
Steam Generators ◽  
Design Considerations ◽  
Exhaust Heat ◽  
Gas Turbine Exhaust ◽  
Exhaust Heat Recovery ◽  
Turbine Exhaust

This paper represents a study of the overall problems encountered in large gas turbine exhaust heat recovery systems. A number of specific installations are described, including systems recovering heat in other than the conventional form of steam generation.

Some Consideration in the Design and Application of Heat Recovery Steam Generators

1969 ◽  
Author(s):  
E. C. Hunt
Keyword(s):  
Steam Generator ◽  
Heat Recovery ◽  
Control Design ◽  
Steam Generation ◽  
Steam Generators ◽  
Forced Circulation ◽  
Construction Methods ◽  
Parallel Control ◽  
Generator Performance ◽  
Design And Application

The characteristics of heat recovery steam generation are compared to fully fired steam generators. Methods for stating performance are discussed. A compact forced circulation design is presented in some detail with comments on possible arrangements, construction methods, materials, and the use of supplementary firing. The importance of parallel control design to the ultimate success of the steam generator performance and operation is presented.

Effectiveness of steam generation in oxyhydrogen steam generators of the megawatt power class

2012 ◽  
Vol 50 (6) ◽  
pp. 765-773 ◽  
Author(s):  
S. P. Malyshenko ◽  
V. I. Prigozhin ◽  
A. R. Savich ◽  
A. I. Schastlivtsev ◽  
V. A. Il’ichev ◽  
...  
Keyword(s):  
Steam Generation ◽  
Steam Generators ◽  
Power Class

scholarly journals Gas Turbine Heat Recovery Steam Generators for Combined Cycles Natural or Forced Circulation Considerations

1988 ◽  
Author(s):  
Akber Pasha
Keyword(s):  
Gas Turbine ◽  
Steam Generator ◽  
Heat Recovery ◽  
Power Plants ◽  
Natural Circulation ◽  
Combined Cycle ◽  
Heat Recovery Steam Generator ◽  
Steam Generators ◽  
Forced Circulation ◽  
Gas Turbine Exhaust

In recent years the combined cycle has become a very attractive power plant arrangement because of its high cycle efficiency, short order-to-on-line time and flexibility in the sizing when compared to conventional steam power plants. However, optimization of the cycle and selection of combined cycle equipment has become more complex because the three major components, Gas Turbine, Heat Recovery Steam Generator and Steam Turbine, are often designed and built by different manufacturers. Heat Recovery Steam Generators are classified into two major categories — 1) Natural Circulation and 2) Forced Circulation. Both circulation designs have certain advantages, disadvantages and limitations. This paper analyzes various factors including; availability, start-up, gas turbine exhaust conditions, reliability, space requirements, etc., which are affected by the type of circulation and which in turn affect the design, price and performance of the Heat Recovery Steam Generator. Modern trends around the world are discussed and conclusions are drawn as to the best type of circulation for a Heat Recovery Steam Generator for combined cycle application.

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