Issues in heat recovery steam generator system noise

To produce the power with higher overall efficiency and reasonable cost is ultimate aim for the power industries in the power deficient scenario. Though combined cycle power plant is most efficient way to produce the power in today’s world, rapidly increasing fuel prices motivates to define a strategy for cost-effective optimization of this system. The heat recovery steam generator is one of the equipment which is custom made for combined cycle power plant. So, here the particular interest is to optimize the combined power cycle performance through optimum design of heat recovery steam generator. The case of combined cycle power plant re-powered from the existing Rankine cycle based power plant is considered to be simulated and optimized. Various possible configuration and arrangements for heat recovery steam generator has been examined to produce the steam for steam turbine. Arrangement of heat exchangers of heat recovery steam generator is optimized for bottoming cycle’s power through what-if analysis. Steady state model has been developed using heat and mass balance equations for various subsystems to simulate the performance of combined power cycles. To evaluate the performance of combined power cycles and its subsystems in the view of second law of thermodynamics, exergy analysis has been performed and exergetic efficiency has been determined. Exergy concepts provide the deep insight into the losses through subsystems and actual performance. If the sole objective of optimization of heat recovery steam generator is to increase the exergetic efficiency or minimizing the exergy losses then it leads to the very high cost of power which is not acceptable. The exergo-economic analysis has been carried to find the cost flow from each subsystem involved to the combined power cycles. Thus the second law of thermodynamics combined with economics represents a very powerful tool for the systematic study and optimization of combined power cycles. Optimization studies have been carried out to evaluate the values of decision parameters of heat recovery steam generator for optimum exergetic efficiency and product cost. Genetic algorithm has been utilized for multi-objective optimization of this complex and nonlinear system. Pareto fronts generated by this study represent the set of best solutions and thus providing a support to the decision-making.

Download Full-text

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

Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration ◽

10.1115/88-gt-142 ◽

1988 ◽

Cited By ~ 3

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.

Download Full-text

Biomass and central receiver system (CRS) hybridization: Integration of syngas/biogas on the atmospheric air volumetric CRS heat recovery steam generator duct burner

Renewable Energy ◽

10.1016/j.renene.2014.10.054 ◽

2015 ◽

Vol 75 ◽

pp. 665-674 ◽

Cited By ~ 14

Author(s):

Bruno Coelho ◽

Armando Oliveira ◽

Peter Schwarzbözl ◽

Adélio Mendes

Keyword(s):

Steam Generator ◽

Heat Recovery ◽

Heat Recovery Steam Generator ◽

Atmospheric Air ◽

Central Receiver ◽

Receiver System ◽

Duct Burner

Download Full-text

New Concept of a Micro Gas Turbine Based Co-Generation Package for Performance Improvement in Practical Use

ASME 2005 Power Conference ◽

10.1115/pwr2005-50364 ◽

2005 ◽

Cited By ~ 3

Author(s):

Kenichiro Mochizuki ◽

Satoshi Shibata ◽

Umeo Inoue ◽

Toshiaki Tsuchiya ◽

Hiroko Sotouchi ◽

...

Keyword(s):

Gas Turbine ◽

Steam Generator ◽

Thermal Efficiency ◽

Heat Recovery ◽

Steam Injection ◽

Operating Conditions ◽

Market Potential ◽

Injection System ◽

Heat Recovery Steam Generator ◽

Micro Gas Turbine

As the energy consumption has been increasing rapidly in the commercial sector in Japan, the market potential for the micro gas turbine is significant and it will be realized substantially if the thermal efficiency is improved. One of measures is to introduce the steam injection system using the steam generated by the heat recovery steam generator. Steam injection tests have been carried out using a micro gas turbine (Capstone C60). Test results showed that key performance parameters such as power output, thermal efficiency and emissions were improved by the steam injection. The stable operation of micro gas turbine with steam injection was confirmed under various operating conditions. Consequently, a micro gas turbine based co-generation package with steam injection driven by a heat recovery steam generator (HRSG) with supplementary firing is proposed.

Download Full-text