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.

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.

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.

scholarly journals Evaluation of electricity generation subsystem of Power-to-Gas-to-Power unit using gas expander and heat recovery steam generator

2019 ◽  
Vol 137 ◽  
pp. 01017
Author(s):  
Daria Katla ◽  
Łukasz Bartela ◽  
Anna Skorek-Osikowska
Keyword(s):  
Steam Generator ◽  
Heat Recovery ◽  
Renewable Energy Sources ◽  
Heat Recovery Steam Generator ◽  
Gas Temperature ◽  
Steam Generation ◽  
Additional Energy ◽  
Renewable Sources ◽  
Power To Gas ◽  
The Impact

In the last years, the European energy policy has required to increase the share of renewable energy sources in the national energy systems. It is important to diversify the energy system not to bring about a global crisis resulting from the fundamental lack of electricity. Unfortunately renewable sources are unstable and generate several problems during integration with the power grid. The solution is to store additional energy produced from renewable sources. In this way, energy can be used when there is a need. The paper discusses the study of the Power-to-Gas-to-Power installation using electrolysis and methanation processes at the energy storage stage and gas expanders during energy discharges. In addition, a part of the Heat Recovery Steam Generation installation has been implemented. The purpose of the work was to determine the impact of a given Heat Recovery Steam Generation installation on the efficiency of the entire installation and flue gas temperature at the outlet from Heat Recovery Steam Generator.

A Heat Recovery Study: Application of Intercooler as a Feed-Water Heater of Heat Recovery Steam Generator

2010 ◽  
Author(s):  
P. Shukla ◽  
M. Izadi ◽  
P. Marzocca ◽  
D. K. Aidun
Keyword(s):  
Steam Generator ◽  
Gas Turbines ◽  
Heat Recovery ◽  
Waste Heat ◽  
Feed Water ◽  
Heat Recovery Steam Generator ◽  
Steam Generation ◽  
Water Heater ◽  
Theoretical Support ◽  
Recovery Study

This paper evaluates the possibility of combining an intercooled gas turbine power cycle with a steam turbine cycle and the application of the intercooler as a feed-water heater for the heat recovery steam generator. In advance gas turbines the intercooler is used to improve the overall efficiency of the simple cycle but a noticeable amount of heat is wasted to the atmosphere. However, this energy can be recovered by using the proposed method in the current study. Accordingly, a thermodynamic study is done to investigate the improvement in efficiency achieved by feed-water heating. First the effect of intercooler parameters on the outlet condition of the water is studied. The bottoming cycle is then studied in details for the effect of feed-water temperature. An estimate of the energy saving by using the proposed method will be reported. The results show that less heat input will be required for the same amount of steam generation. The current study provides a theoretical support for waste heat recovery from the intercooler.

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.

Modeling of heat recovery steam generator performance

1997 ◽  
Vol 17 (5) ◽  
pp. 427-446 ◽  
Author(s):  
A. Ong'iro ◽  
V.I. Ugursal ◽  
A.M. Al Taweel ◽  
J.D. Walker
Keyword(s):  
Steam Generator ◽  
Heat Recovery ◽  
Heat Recovery Steam Generator ◽  
Generator Performance

scholarly journals EVALUASI KINERJA HEAT RECOVERY STEAM GENERATION DI PT INDONESIA POWER UBP PRIOK

2020 ◽  
Vol 1 (2) ◽  
pp. 77-83
Author(s):  
Kartono ◽  
Tina Mulya Gantina ◽  
Mega Andayani
Keyword(s):  
Steam Generator ◽  
Heat Balance ◽  
Heat Recovery ◽  
Heat Recovery Steam Generator ◽  
Steam Generation

Heat Recovery Steam Generator merupakan alat penukar panas yang digunakan untuk mengubah air menjadi uap dengan memanfaatkan panas gas buang. Pada siklus PLTGU, panas buang yang dimanfaatkan HRSG berasal dari turbin gas dan uap yang dihasilkan digunakan untuk memutar turbin uap. HRSG di PT Indonesia Power UBP Priok terdiri dari LP ekonomiser, LP evaporator, HP ekonomiser, HP evaporator dan HP superheater. Untuk menentukan kinerja HRSG, maka dihitung efisiensi dengan cara langsung dan dibandingkan dengan efisiensi pada saat komisioning (heat balance) pada tahun 1994. Untuk menentukan komponen mana yang mengalami penurunan kinerja, maka dihitung efisiensi dari komponen – komponennya. Dari hasil perhitungan didapatkan efisiensi HRSG sebesar 88,8% hingga 90,8%, sedangkan efisiensi HRSG pada saat komisioning (heat bolance) adalah sebesar 94%. Hal ini menunjukkan bahwa HRSG telah mengalami penurunan kinerja sekitar 3 – 5%. Sedangkan komponen yang mengalami penurunan kinerja cukup tinggi adalah LP evaporator dengan efisiensi mencapai 82,2%. Penurunan ini diakibatkan oleh suhu air umpan yang terlalu tinggi. Selain itu, penurunan kinerja HRSG dapat juga disebabkan oleh adanya pengerakan pipa – pipa HRSG terutama pada evaporator akibat dari akumulasi panas yang tingi. Upaya untuk menanggulangi hal tersebut adalah dengan menjaga kualitas air umpan HRSG, terutama kandungan mineral kalsium dan magnesium sebagai penyebab utama pengerakan. Selain itu, harus dilakukan pengecekan, perawatan dan pembersihan HRSG agar penyerapan panas gas buang oleh air dapat lebih efisien.

Twenty Years of Operation in NPP Krsko

2002 ◽  
Author(s):  
Kresimir Nemcic ◽  
Robert Brems
Keyword(s):  
Water Chemistry ◽  
Steam Generator ◽  
Nuclear Power ◽  
Steam Generators ◽  
Main Design ◽  
Counter Measures ◽  
Before And After ◽  
Useful Life ◽  
Generator Performance ◽  
Generator Replacement

This paper presents the main design and fabrication improvements that were included in the new steam generators that were installed at Nuclear Power Plant Krsko in Slovenia in 2000. These improvements were a result of an on-going R & D effort associated with steam generator technology, aimed at increased reliability and better maintainability of new steam generators. The paper also provides basic information related to 20 years of operation of NPP Krsko with an emphasis on subjects related to steam generator performance and degradation. These include inservice inspection results on steam generators up to replacement, corrective actions, corrosion-erosion counter-measures, and replacement of condenser and moisture spearator reheaters with improved material. The paper also provides data regarding changes in feedwater and steam generator water chemistry, with water chemistry results before and after steam generator replacement. This paper shows that materials issues are very important for steam generator reliability, and it gives the reasons why specific materials were selected for replaced components. Finally, the paper demonstrates how the strategy used at NPP Krsko prolonged the useful life of the old steam generators until replacement steam generators could be designed, fabricated, and installed.

Energy and Exergy Analysis of the Kalina Cycle Based Combined Cycle Using Solar Heating

2014 ◽  
Author(s):  
Mayank Maheshwari ◽  
Onkar Singh
Keyword(s):  
Steam Generator ◽  
Heat Recovery ◽  
Mass Concentration ◽  
Combined Cycle ◽  
Solar Heating ◽  
Flue Gases ◽  
Working Fluid ◽  
Heat Recovery Steam Generator ◽  
Steam Generation ◽  
Kalina Cycle

Gas and steam combined cycle has Brayton cycle and Rankine cycle as topping and bottoming cycles respectively. Gas based topping cycle has flue gases leaving at high temperature which are utilized in heat recovery steam generator for steam generation. The steam thus generated is used for running steam turbine in bottoming cycle. It is seen that the heat recovery steam generator although offers reasonable heat recovery from flue gases but the temperature variation profile of gas does not match with that of steam generation. The use of ammonia in place of steam as working fluid offers a good matching of temperature profile of flue gas and ammonia and thus has capability to offer effective utilization of waste heat. In present work thermodynamic analysis of Kalina cycle used in combined cycle has been carried out. It includes the performance evaluation in terms of ammonia mass concentration, turbine inlet temperature and cycle pressure ratio. The results show that on increasing the ammonia mass fraction the efficiency of the cycle decreases up to ammonia mass concentration of 0.7 but beyond that efficiency starts increasing. It also indicates that by installing the solar heating, there occurs a heat gain up to 5% as compared to without solar heating for any given operating parameters.

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