Technical Evaluation and Applications of Heat Recovery From Simple Cycle Gas Turbine Exhaust Systems

2021 ◽  
Author(s):  
Fadi Ghaith ◽  
Bouria Faqihi
Author(s):  
W. V. Hambleton

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.


2002 ◽  
Vol 124 (3) ◽  
pp. 496-502 ◽  
Author(s):  
B. E. Lee ◽  
S. B. Kwon ◽  
C. S. Lee

Computational and experimental studies are performed to investigate the effect of swirl flow of gas turbine exhaust gas (GTEG) in an inlet duct of a heat recovery steam generator (HRSG). A supplemental-fired HRSG is chosen as the model studied because the uniformity of the GTEG at the inlet plane of the duct burner is essential in such applications. Both velocity and oxygen distributions are investigated at the inlet plane of the duct burner installed in the middle of the HRSG transition duct. Two important parameters, the swirl angle of GTEG and the momentum ratio of additional air to GTEG, are chosen for the investigation of mixing between the two streams. It has been found that a flow correction device (FCD) is essential to provide a uniform gas flow distribution at the inlet plane of the duct burner.


Author(s):  
Akber Pasha

The design of a gas turbine exhaust heat recovery system (HRS) depends upon evaluating various parameters. Basically for an unfired heat recovery system the heat contained in the gas turbine exhaust is fixed and output is determined based on the system’s effectiveness. One of the design objectives is to maximize the output and thus maximize the effectiveness. However, increase in effectiveness will increase required heat transfer surface and thus the cost of the HRS. The increased cost (and benefits) must be evaluated to establish whether the higher effective system is economically justifiable. The evaluation criteria of a heat recovery system involves analysis of various design parameters. This paper presents the general design procedure, the effect of each parameter on the design and basic criteria used to develop the HRS design.


1982 ◽  
Vol 104 (1) ◽  
pp. 77-83
Author(s):  
B. M. Burnside

A dual pressure steam/immiscible liquid cycle gas turbine bottoming plant is described. Three variants of the cycle are analysed. It is shown that under typical conditions one of these shows a 5 percent higher output than the conventional steam/steam cycle with only a 5 percent increase in heat extraction from the gas turbine exhaust. A larger LP preheater and condenser are required. Attention is drawn to the flexibility this type of cycle brings to the task of matching bottoming plant to gas turbine exhaust of combined cycles.


Author(s):  
V. L. Eriksen ◽  
J. M. Froemming ◽  
M. R. Carroll

Heat recovery boilers utilizing the exhaust from gas turbines continue to be viable as industrial cogeneration systems. This paper outlines the types of heat recovery boilers available for use with gas turbines (1–100 MW). It discusses the design and performance criteria for both unfired and supplementary fired gas turbine exhaust heat recovery boilers of single and multiple pressure levels. Equations to assist in energy balances are included along with design features of heat recovery system components. The economic incentive to achieve the maximum practical heat recovery versus the impact on boiler design and capital cost are examined and discussed. It is intended that the information presented in this paper will be of use to individuals who are not intimately familiar with gas turbine heat recovery systems so that they can better specify and evaluate potential systems.


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