LCC/RAM Simulation in Support of Gas Turbine Power Plant Forecasting

2003 ◽  
Author(s):  
Neil Winchester ◽  
Steve Hall
Keyword(s):  
Gas Turbine ◽  
Life Cycle Cost ◽  
Power Plants ◽  
Discrete Event ◽  
Cost Effective ◽  
Optimum Operating ◽  
Cost Effective Method ◽  
Simulation Based ◽  
Recent Developments ◽  
Automated Simulation

The activity of Life-Cycle Cost (LCC) forecasting using Reliability, Availability, and Maintainability (RAM) modeling techniques is not new, but there have been recent developments which have resulted in a fundamental change in the usefulness of LCC forecasting to designers, owners, operators, and maintainers of power plants. These changes provide the means for optimizing Operation and Maintenance (O&M) activities many years in advance with a high degree of accuracy. The primary changes have been advances in technology and the introduction of Monte Carlo-based discrete event simulation technology to perform RAM forecasting. Simulation based LCC forecasting can be used to determine the optimum operating and maintenance support scenarios. Main areas of optimization include the initial and through life cost, spares inventory holding, maintenance scheduling, logistics, etc. By allowing various scenarios to be explored in a simulation environment, LCC forecasting provides an accurate and cost effective method for optimizing costs — an activity with a very high Return On Investment (ROI) value proposition. This paper describes the methodology undertaken and the results that can be obtained from the application of automated, simulation-based LCC forecasting technology to the analysis of gas turbine based generating units.

scholarly journals Benefits, Drawbacks, and Future Trends of Brayton Helium Gas Turbine Cycles for Gas-Cooled Fast Reactor and Very-High Temperature Reactor Generation IV Nuclear Power Plants

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Arnold Gad-Briggs ◽  
Emmanuel Osigwe ◽  
Pericles Pilidis ◽  
Theoklis Nikolaidis ◽  
Suresh Sampath ◽  
...  
Keyword(s):  
High Temperature ◽  
Gas Turbine ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Optimum Operating ◽  
Future Trends ◽  
Design Point ◽  
Gen Iv ◽  
Very High

Abstract Numerous studies are on-going on to understand the performance of generation IV (Gen IV) nuclear power plants (NPPs). The objective is to determine optimum operating conditions for efficiency and economic reasons in line with the goals of Gen IV. For Gen IV concepts such as the gas-cooled fast reactors (GFRs) and very-high temperature reactors (VHTRs), the choice of cycle configuration is influenced by component choices, the component configuration and the choice of coolant. The purpose of this paper to present and review current cycles being considered—the simple cycle recuperated (SCR) and the intercooled cycle recuperated (ICR). For both cycles, helium is considered as the coolant in a closed Brayton gas turbine configuration. Comparisons are made for design point (DP) and off-design point (ODP) analyses to emphasize the pros and cons of each cycle. This paper also discusses potential future trends, include higher reactor core outlet temperatures (COT) in excess of 1000 °C and the simplified cycle configurations.

Liquefaction and Lateral Spread Evaluation and Mitigation for Highway Overpass Structure: Cherry Hill Interchange, Davis County, Utah

2000 ◽  
Vol 1736 (1) ◽  
pp. 119-126
Author(s):  
Bradford E. Price ◽  
Marc Stilson ◽  
Michael Hansen ◽  
Jon Bischoff ◽  
T. Leslie Youd
Keyword(s):  
Cost Effective ◽  
Standard Penetration Test ◽  
Lateral Spread ◽  
Vertical Movements ◽  
Cone Penetration Tests ◽  
Cost Effective Method ◽  
Liquefaction Hazard ◽  
Recent Developments ◽  
Design Earthquake ◽  
A Minor

Transportation structures constructed in areas of significant seismic hazards are subject to lateral and vertical movements that can threaten the integrity of structures built on liquefiable subsoils. This case history summarizes the geology, analysis methods, mitigation requirements, and proposed quality control for the Cherry Hill Interchange project in Davis County, Utah. A liquefaction and lateral spread liquefaction hazard during the design earthquake has been identified that threatens failure of the proposed bridge. Cone penetration tests were determined to be a cost-effective method for supplementing standard penetration test borings to gain sufficient subsurface information for the liquefaction and lateral spread analysis. A cost-effective solution for protecting the bridge from the hazard has been developed using geotechnical principles combined with recent developments in liquefaction mitigation. The cost of the mitigation is a minor percentage of the overall project cost but is anticipated to protect the bridge from collapse and save lives.

A pilot of the Paramedic Advanced Resuscitation of Children (PARC) course

2019 ◽  
Vol 11 (11) ◽  
pp. 470-478
Author(s):  
Paddy Ennis
Keyword(s):  
Child Health ◽  
Royal College ◽  
Gold Standard ◽  
Life Support ◽  
Prehospital Care ◽  
Cost Effective ◽  
Effective Evaluation ◽  
Cost Effective Method ◽  
Simulation Based ◽  
And Child Health

Paramedics are the primary providers of prehospital care to children in an emergency. However, they deal with children's emergencies infrequently, and consistently report a lack of confidence in this area. The Royal College of Paediatrics and Child Health standards state that clinicians with Advanced Paediatric Life Support (APLS) training or equivalent must be available at all times to deal with emergencies involving children. While APLS is widely recognised as the gold standard in paediatric training, it focuses on in-hospital providers of paediatric life support, so may not adequately meet the needs of prehospital providers. The Paramedic Advanced Resuscitation of Children (PARC) course attempts to condense the most important aspects of APLS for paramedics into a simulation-based programme that is practical and cost effective. Evaluation of the views of the eight paramedics who took part in the pilot revealed that they felt more confident in managing children's emergencies after attending the course. The PARC course may be a simple, cost-effective method to improve paramedics’ confidence in dealing with emergencies involving children.

scholarly journals Thermal and Economic Analysis of Gas Turbine Using Inlet Air Cooling System

2018 ◽  
Vol 225 ◽  
pp. 01020
Author(s):  
Thamir K. Ibrahim ◽  
Mohammed K. Mohammed ◽  
Omar I. Awad ◽  
Rizalman Mamat ◽  
M. Kh Abdolbaqi
Keyword(s):  
Life Cycle ◽  
Power Systems ◽  
Gas Turbine ◽  
Life Cycle Cost ◽  
Power Plants ◽  
Cooling System ◽  
Air Cooling ◽  
Air Cooling System ◽  
Cooling Mechanism ◽  
Cooling Loads

A basic goal of operation management is to successfully complete the life cycle of power systems, with optimum output against minimal input. This document intends calculating both, the performance and the life cycle cost of a gas turbine fitted with an inlet air cooling mechanism. Correspondingly, both a thermodynamic and an economic model are drawn up, to present options towards computing the cooling loads and the life cycle costs. The primary observations indicate that around 120MWh of power is derived from gas turbine power plants incorporating the cooling mechanism, compared to 96.6 MWh for units without the mechanism, while the life cycle cost is lower for units incorporating the cooling process. This indicates benefits in having the mechanism incorporated in the architecture of a gas turbine.

Repair of Advanced Gas Turbine Blades

2007 ◽  
Author(s):  
Reiner Anton ◽  
Brigitte Heinecke ◽  
Michael Ott ◽  
Rolf Wilkenhoener
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Life Cycle Cost ◽  
High Efficiency ◽  
High Reliability ◽  
Turbine Blades ◽  
Cost Effective ◽  
Complex Nature ◽  
Thin Wall ◽  
Advanced Technologies

The availability and reliability of gas turbine units are critical for success to gas turbine users. Advanced hot gas path components that are used in state-of-the-art gas turbines have to ensure high efficiency, but require advanced technologies for assessment during maintenance inspections in order to decide whether they should be reused or replaced. Furthermore, advanced repair and refurbishment technologies are vital due to the complex nature of such components (e.g., Directionally Solidified (DS) / Single Crystal (SC) materials, thin wall components, new cooling techniques). Advanced repair technologies are essential to allow cost effective refurbishing while maintaining high reliability, to ensure minimum life cycle cost. This paper will discuss some aspects of Siemens development and implementation of advanced technologies for repair and refurbishment. In particular, the following technologies used by Siemens will be addressed: • Weld restoration; • Braze restoration processes; • Coating; • Re-opening of cooling holes.

Case Studies of Pulsed Eddy Current to Measure Wall Loss in Feedwater Piping and Heater Shells

2008 ◽  
Author(s):  
Marvin J. Cohn ◽  
Jordan W. Norton
Keyword(s):  
Eddy Current ◽  
Power Plants ◽  
Cost Effective ◽  
Nuclear Industry ◽  
Accelerated Corrosion ◽  
Pulsed Eddy Current ◽  
Catastrophic Failures ◽  
Recent Developments ◽  
Wall Loss ◽  
Flow Accelerated Corrosion

There have been several feedwater piping and heater shell failures in power plants caused by flow-accelerated corrosion (FAC). This failure mechanism may be one of the most important types of damage to find proactively because FAC damage has occasionally resulted in catastrophic failures and human fatalities. Predicting, detecting, and resolving significant FAC damage can significantly reduce future forced outages and increase personnel safety. This paper describes the implementation of recent developments to perform cost-effective FAC examinations. These advances include the use of specialized pulsed eddy current (PEC) hardware and software to scan for wall thinning without removing insulation. Recent results are based on the current version, MK II, of this equipment. The authors have performed more than 200 power plant projects with this PEC equipment, examining numerous pipes and shells. This work consists of more than 70 projects of wall loss examinations for the nuclear industry, including examinations of feedwater heater shells inside the condenser. Results of wall loss measurements regarding PEC average wall thickness (AWT) measurements, ultrasonic thickness examinations (UTTH), and the PEC evaluated Defect Algorithm are compared in this study.

scholarly journals Evaluation of Property Methods for Modeling Direct-Supercritical CO2 Power Cycles

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Charles W. White ◽  
Nathan T. Weiland
Keyword(s):  
Power Plants ◽  
Physical Property ◽  
Aspen Plus ◽  
Cost Effective ◽  
Operating Conditions ◽  
Working Fluid ◽  
Power Cycles ◽  
As Species ◽  
Cost Effective Method ◽  
Open Nature

Direct supercritical carbon dioxide (sCO2) power cycles are an efficient and potentially cost-effective method of capturing CO2 from fossil-fueled power plants. These cycles combust natural gas or syngas with oxygen in a high pressure (200–300 bar), heavily diluted sCO2 environment. The cycle thermal efficiency is significantly impacted by the proximity of the operating conditions to the CO2 critical point (31 °C, 73.7 bar) as well as to the level of working fluid dilution by minor components, thus it is crucial to correctly model the appropriate thermophysical properties of these sCO2 mixtures. These properties are also important for determining how water is removed from the cycle and for accurate modeling of the heat exchange within the recuperator. This paper presents a quantitative evaluation of ten different property methods that can be used for modeling direct sCO2 cycles in Aspen Plus®. Reference fluid thermodynamic and transport properties (REFPROP) is used as the de facto standard for analyzing high-purity indirect sCO2 systems, however, the addition of impurities due to the open nature of the direct sCO2 cycle introduces uncertainty to the REFPROP predictions as well as species that REFPROP cannot model. Consequently, a series of comparative analyses were performed to identify the best physical property method for use in Aspen Plus® for direct-fired sCO2 cycles. These property methods are assessed against several mixture property measurements and offer a relative comparison to the accuracy obtained with REFPROP. The Lee–Kessler–Plocker equation of state (EOS) is recommended if REFPROP cannot be used.

Development of an Annular Combustor Chamber

2013 ◽  
Author(s):  
Uwe Ruedel ◽  
Bogdan Trbojevic ◽  
Urs Benz ◽  
Martin Zajadatz ◽  
Klaus Doebbeling
Keyword(s):  
Gas Turbine ◽  
Life Cycle Cost ◽  
Cost Effective ◽  
Operational Flexibility ◽  
Hot Gas ◽  
Operation Conditions ◽  
Barrier Coating ◽  
Annular Combustor ◽  
Generation Costs ◽  
Development And Validation

To accommodate the customer’s expectations for operational flexibility and low power generation costs, a gas turbine has to be robust, flexible and cost effective. Since its introduction in 1993 and with its more than 7.5 million operating hours and over 54’000 starts, the GT13E2 gas turbine has already demonstrated to be a most flexible and reliable engine. It is being used in connection with many different applications, and meets a very broad range of environment and operation conditions. The GT13E2 upgrade 2012 described in this paper further improves these capabilities. The next generation of GT13E2 combustors is improved for increased lifetime, reduced total life cycle cost and implementation of a low emission dual fuel AEV burner system. The basic design philosophy for the lifetime improvement is adapted from the well-proven GT24 and GT26 annular combustors. The liner segments represent Alstom’s proven technology of sealed TBC coated metallic combustor liners that can expand in their fixations. The application of a thermal barrier coating onto the segments is simple and cost-effective. The design is robust so that the liners have to be checked only at major inspections and are not subject to reconditioning/replacement at hot gas part inspections. The closed-loop cooling arrangement is used for the backside cooling of the hot gas liner segments and to maintain the large structural components at a constant temperature. This combustion segment improvement is combined with the AEV (Advanced EnVironmental) burner. All the mentioned features result in a marked improvement of the operating and cyclic lifetime of the GT13E2 combustor. This paper describes the development and validation process for the implementation of the combustion liner segment technology of the GT13E2. The various design phases from concept development to validation including the generic tests and final engine implementation are described and substantiated.

scholarly journals Running in Place

2017 ◽  
Vol 139 (06) ◽  
pp. 32-37 ◽  
Author(s):  
Lee S. Langston
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Low Cost ◽  
Cost Effective ◽  
Fast Reaction ◽  
Average Output ◽  
Commercial Aviation ◽  
Performance Improvements ◽  
Renewable Power

This article highlights technological performance improvements in the gas turbine industry and its likely future course. While the outlook for commercial aviation gas turbines is bright, the non-aviation segment is decidedly clouded. While analysts have focused on the growing demand for electricity worldwide, the average output of each individual gas turbine unit is also increasing, and at a rate that is faster than that of electricity demand. Gas turbine power plants also have the advantage of dispatchability, which wind, hydroelectric, and solar often do not. A recent econometric study of renewable electric power implementation shows that the use of fast-reacting fossil technologies such as gas turbines to hedge against variability of electrical supply made it more likely to result in the successful investment and use of renewables. The article suggests that gas turbine power plants are cost-effective and can provide a necessary backup to the variability of renewable power plants. Gas turbines combine low cost and fast reaction time in a way that will enable the grid to handle winds dying down unexpectedly or unpredicted heavy clouds diminishing solar power output.

The Potential Impact of Multiplane-Multispeed Balancing on Gas Turbine Production and Overhaul Costs

1975 ◽  
Vol 97 (3) ◽  
pp. 347-353 ◽  
Author(s):  
R. H. Badgley
Keyword(s):  
Gas Turbine ◽  
Cost Effective ◽  
Gas Turbine Engine ◽  
Single Step ◽  
Potential Cost ◽  
Turbine Engine ◽  
Critical Speeds ◽  
Cost Effective Method ◽  
Bearing Assembly ◽  
Potential Impact

This paper describes recent advances in the development of a practical, cost-effective method for balancing, in a single step, a final shaft-bearing assembly simultaneously in a number of planes and at a number of speeds. This method is capable of overcoming assembly-introduced unbalance, and will permit rotor operation through critical speeds in which component elastic axis bending occurs. Detailed results of test efforts are presented in order to illustrate the effectiveness of the method. The procedure by which the method may be applied to gas turbine engine shafts, and the potential cost advantages expected to accrue therefrom, are described and discussed.

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