scholarly journals Failure Analysis of High Pressure High Temperature Super- Heater Outlet Header Tube in Heat Recovery Steam Generator

2017 ◽  
Author(s):  
Ainul Akmar Mokhtar ◽  
Muhammad Kamil Kamarul Bahrin
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Failure Analysis ◽  
Steam Generator ◽  
Heat Recovery ◽  
Heat Recovery Steam Generator ◽  
High Pressure High Temperature ◽  
Super Heater

Design, Part Load and Transient Operation of Combined Cycle Plants With Water Flashing

1995 ◽  
Author(s):  
P. J. Dechamps
Keyword(s):  
High Pressure ◽  
Steam Generator ◽  
Gas Turbines ◽  
Heat Recovery ◽  
Vapour Phase ◽  
Pressure Level ◽  
Combined Cycle ◽  
Saturated Steam ◽  
Heat Recovery Steam Generator ◽  
Combined Cycles

The last decade has seen remarkable improvement in gas turbine based power generation technologies, with the increasing use of natural gas-fuelled combined cycle units in various regions of the world. The struggle for efficiency has produced highly complex combined cycle schemes based on heat recovery steam generators with multiple pressure levels and possibly reheat. As ever, the evolution of these schemes is the result of a technico-economic balance between the improvement in performance and the increased costs resulting from a more complex system. This paper looks from the thermodynamic point of view at some simplified combined cycle schemes based on the concept of water flashing. In such systems, high pressure saturated water is taken off the high pressure drum and flashed into a tank. The vapour phase is expanded as low pressure saturated steam or returned to the heat recovery steam generator for superheating, whilst the liquid phase is recirculated through the economizer. With only one drum and three or four heat exchangers in the boiler as in single pressure level systems, the plant might have a performance similar to that of a more complex dual pressure level system. Various configurations with flash tanks are studied based on commercially available 150 MW-class E-technology gas turbines and compared with classical multiple pressure level combined cycles. Reheat units are covered, both with flash tanks and as genuine combined cycles for comparison purposes. The design implications for the heat recovery steam generator in terms of heat transfer surfaces are emphasized. Off-design considerations are also covered for the flash based schemes, as well as transient performances of these schemes, because the simplicity of the flash systems compared to normal combined cycles significantly affects the dynamic behaviour of the plant.

Optimization Studies for Integrated Solar Combined Cycle Systems

2001 ◽  
Author(s):  
Bruce Kelly ◽  
Ulf Herrmann ◽  
Mary Jane Hale
Keyword(s):  
High Pressure ◽  
Steam Generator ◽  
Heat Recovery ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
Saturated Steam ◽  
Heat Recovery Steam Generator ◽  
Parabolic Trough ◽  
Solar Plant ◽  
Combined Cycle Plant

Abstract The integrated solar plant concept was initially proposed by Luz Solar International [1] as a means of integrating a parabolic trough solar plant with modern combined cycle power plants. An integrated plant consists of a conventional combined cycle plant, a solar collector field, and a solar steam generator. During sunny periods, feedwater is withdrawn from the combined cycle plant heat recovery steam generator, and converted to saturated steam in the solar steam generator. The saturated steam is returned to the heat recovery steam generator, and the combined fossil and solar steam flows are superheated in the heat recovery steam generator. The increased steam flow rate provides an increase in the output of the Rankine cycle. During cloudy periods and at night, the integrated plant operates as a conventional combined cycle facility. Two studies on integrated plant designs using a General Electric Frame 7(FA) gas turbine and a three pressure heat recovery steam generator are currently being conducted by the authors. Preliminary results include the following items: 1) the most efficient use of solar thermal energy is the production of high pressure saturated steam for addition to the heat recovery steam generator; 2) the quantity of high pressure steam generation duty which can be transferred from the heat recovery steam generator to the solar steam generator is limited; thus, the maximum practical solar contribution is also reasonably well defined; 3) small annual solar thermal contributions to an integrated plant can be converted to electric energy at a higher efficiency than a solar-only parabolic trough plant, and can also raise the overall thermal-to-electric conversion efficiency in the Rankine cycle; and 4) annual solar contributions up to 12 percent in an integrated plant should offer economic advantages over a conventional solar-only parabolic trough power plant.

scholarly journals ANALISIS TOTAL EFISIENSI HRSG (HEAT RECOVERY STEAM GENERATOR) PADA COMBINE CYCLE POWER PLANT (CCPP) 120 MW PT. KRAKATAU DAYA LISTRIK

ROTASI ◽  
2016 ◽  
Vol 18 (2) ◽  
pp. 28
Author(s):  
Eflita Yohana ◽  
Rahmat Julyansyah
Keyword(s):  
High Pressure ◽  
Power Plant ◽  
Steam Generator ◽  
Heat Recovery ◽  
Low Pressure ◽  
Combine Cycle Power Plant ◽  
Heat Recovery Steam Generator ◽  
Combine Cycle

Heat Recovery Steam Generator (HRSG) adalah suatu komponen kesatuan antara turbin gas dan turbin uap pada sistem combine cycle power plant. HRSG berfungsi sebagai alat yang memanfaatkan energi panas gas buang dari gas turbin untuk memanaskan air pada tube - tube yang berada di dalam HRSG, sehingga air berubah menjadi uap panas lanjut untuk memutar turbin uap [1]. Analisa dilakukan pada HRSG Pembangkit Listrik Tenaga Gas dan Uap melalui perhitungan total efisiensi berdasarkan temperatur, tekanan, dan laju massa yang masuk dan keluar HRSG. Selain itu analisa ini untuk membandingkan total efisiensi HRSG pada saat commisioning process dengan bulan Januari 2016. Data temperatur, tekanan, dan laju massa yang diperoleh telah tercatat melalui layanan system operasi interface. Dari hasil perhitungan nantinya akan diketahui nilai total efisiensi HRSG commisioning sebesar 93,31% dengan nilai efisiensi high pressure sebesar 69,62% dan nilai efisiensi low pressure sebesar 23,69%, dibandingkan dengan nilai total efisiensi HRSG pada bulan Januari 2016 sebesar 79,88% dengan nilai efisiensi high pressure sebesar 66,47% dan nilai efisiensi low pressure sebesar 13,41%. Terjadi penurunan nilai efisiensi saat commisioning dengan bulan Januari 2016 yaitu sebesar 13,43%.

Sign in / Sign up

Export Citation Format

Share Document