Enhancing System Availability and Performance In Combined Cycle Power Plants by the use of Condition Monitoring

1994 ◽  
Author(s):  
Meherwan P. Boyce ◽  
George Gabriles ◽  
Cyrus B. Meher-Homji
Keyword(s):  
Condition Monitoring ◽  
Power Plants ◽  
Combined Cycle ◽  
System Availability ◽  
And Performance

Operation Diagnosis of a Combined Cycle Based on the Structural Theory of Thermoeconomics

1999 ◽  
Author(s):  
Luis Correas ◽  
Ángel Martínez ◽  
Antonio Valero
Keyword(s):  
Power Plants ◽  
Poor Quality ◽  
Structural Theory ◽  
Combined Cycle ◽  
Data Reconciliation ◽  
Data Sets ◽  
Component Level ◽  
Performance Diagnosis ◽  
Field Instrumentation ◽  
And Performance

Abstract Diagnosis of the performance of energy was theoretically developed based on the Structural Theory (Valero, Serra and Lozano, 1993), and traditionally Thermoeconomics have usually been applied to the design of power plants and comparison between alternatives. However, the application of thermoeconomic techniques to actual power plants has always to face the generally poor quality of measurement readings from the standard field instrumentation as an unavoidable first step. The proposed methodology focuses on measurement uncertainty estimation and performance calculation by means of data reconciliation techniques, in order to obtain the most confident plant balance upon the available instrumentation. The formulation of the Structural Theory has been applied to a combined cycle, where the Fuel-Product relationships at the component level must be optimally defined for a correct malfunction interpretation. This set of relationships determines the ability to diagnose and the level of the diagnostics obtained. The paper reports the application of the methodology to a 280 MW rated combined cycle, where performance diagnosis is illustrated with results from a collection of actual operation data sets. The results show that data reconciliation yields sufficient accuracy to conduct a thermoeconomic analysis, and how the estimated impact on fuel correlates with physical causes. Hence the feasibility of thermoeconomic analysis of plant operation is demonstrated.

Thermodynamic Modeling and Performance Simulation of Combined Cycle Power Plant Under Design and Off-Design Condition

2021 ◽  
Author(s):  
Lalatendu Pattanayak ◽  
Biranchi Narayana Padhi ◽  
Hemant Gajjar
Keyword(s):  
Power Plants ◽  
Model Simulation ◽  
Performance Comparison ◽  
Combined Cycle ◽  
System Component ◽  
Air Cooling ◽  
Component Level ◽  
Performance Simulation ◽  
Design Performance ◽  
And Performance

Abstract Combined cycle power plants (CCPP) are increasingly important for safer and cleaner electricity generation. In this context it is imperative to explore options to enhance its thermal performance for its design and off-design condition. This study presents the performance comparison of two heavy-duty gas turbined (GT) based CCPP with triple pressure steam bottoming cycle. The CCPP system component is modeled using a commercial software Ebsilon and the off-design performance prediction is made using necessary component correlations. The correlations make use of normalized curves that are generated from model runs and apply the factors received from such curve to design performance to estimate the off-design performance. The model simulation is validated against literatures. Furthermore, inlet air cooling technique (IAC) is introduced in this study to enhance the CCPP power production without compromising component performance. The performance comparison of both the CCPP units are presented in an integrated manner by considering interaction of bottoming cycle on GT operation. The results are established as a function of ambient temperature based on energy and exergy principle and the power boosting and economic profit. The results also demonstrate the benefit of IAC on part-load performance. The component level exergy analysis proved that IAC improves the system exergy efficiency.

scholarly journals Real-Time Economic Optimization

1993 ◽  
Author(s):  
Timothy A. Dierauf ◽  
Steven J. Hanawalt ◽  
James M. Hinrichs
Keyword(s):  
Real Time ◽  
Management System ◽  
Power Plants ◽  
Power Industry ◽  
Combined Cycle ◽  
Performance Characteristics ◽  
Economic Optimization ◽  
Economic Management ◽  
And Performance

The objective of this paper is to describe the development and commissioning process of a real-time, computerized, performance and economic management system used in optimizing combined cycle power plants. The scope of the paper will include a description of the process of modeling the plant economic and performance characteristics, as well as the motivation behind real-time economic optimization in the power industry today.

Economic and Performance Evaluation of Heat Sink Options in Combined Cycle Applications

2003 ◽  
Author(s):  
Rattan Tawney ◽  
Zahid Khan ◽  
Justin Zachary
Keyword(s):  
Heat Sink ◽  
Power Plants ◽  
Operation Mode ◽  
Combined Cycle ◽  
Heat Sinks ◽  
Site Location ◽  
Wastewater Disposal ◽  
Environmental Requirements ◽  
And Performance ◽  
The Impact

Because of the current environmental requirements for zero discharge from power plants and scarcity of water, the cooling tower—a proven and industry-recognized conventional option for combined cycle application heat sinks—is being scrutinized by designers, developers, operators, and regulatory agencies. This paper is a guideline to selecting the most appropriate solution for the plant heat sink based on water availability, site location, and wastewater disposal requirements. The paper discusses wet as well as dry cooling systems and evaluates the impact of heat sink selection for cogeneration applications and merchant power plant cycling operation mode. For each proposed option, the performance, relative costs, and noise issues will be presented.

Economic and Performance Evaluation of Heat Sink Options in Combined Cycle Applications

2005 ◽  
Vol 127 (2) ◽  
pp. 397-403 ◽  
Author(s):  
Rattan Tawney ◽  
Zahid Khan ◽  
Justin Zachary
Keyword(s):  
Heat Sink ◽  
Power Plants ◽  
Combined Cycle ◽  
Appropriate Technology ◽  
Site Location ◽  
Cooling Systems ◽  
Wastewater Disposal ◽  
Plant Operations ◽  
And Performance ◽  
The Impact

This paper is a guideline to selecting the most appropriate technology for the power plant heat sink based on water availability, site location, and wastewater disposal requirements. The paper discusses wet as well as dry cooling systems and evaluates the impact of the heat sink technology on the performance and cost of combined cycle power plants. Cogeneration applications and cycling plant operations are also considered. For each proposed option, the performance, relative costs, and noise issues will be presented.

Design Possibilities and Performance of Combined Cycle Operation of Converted Steam Power Plants

1988 ◽  
Author(s):  
M. J. J. Linnemeijer ◽  
J. P. Van Buijtenen
Keyword(s):  
Power Plant ◽  
Gas Turbines ◽  
Power Plants ◽  
Combined Cycle ◽  
Steam Power ◽  
Steam Power Plants ◽  
Power Increase ◽  
Efficiency Increase ◽  
And Performance ◽  
Unit Performance

An interesting method for “boosting thermal efficiency and/or power output of an existing steam power plant is repowering through the addition of gas turbines. The forced draught fan is replaced by a gas turbine and the air heater by low-temperature economisers. This conversion will change the performance of the installation significantly. Therefore the design of the existing installation has to be reviewed based on new unit performance calculations. Since the conversion has to be economical, it is important to find a good compromise between investment and improvement of performance. This paper describes the change in performance of the installation created by the conversion in general and a number of design possibilities based on the experience gained with the realisation of a number of conversion projects. These projects show a possible efficiency increase of over 10% and a power increase of up to 30%.

Economic Analysis of an Electric Thermal Energy Storage System Using Solid Particles for Grid Electricity Storage

2021 ◽  
Author(s):  
Zhiwen Ma ◽  
Xingchao Wang ◽  
Patrick Davenport ◽  
Jeffrey Gifford ◽  
Janna Martinek
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Power Plants ◽  
Fossil Fuel ◽  
Peak Load ◽  
Combined Cycle ◽  
Solid Particles ◽  
Renewable Power ◽  
And Performance

Abstract As renewable power generation becomes the mainstream new-built energy source, energy storage will become an indispensable need to complement the uncertainty of renewable resources to firm the power supply. When phasing out fossil-fuel power plants to meet the carbon neutral utility target in the midcentury around the world, large capacity of energy storage will be needed to provide reliable grid power. The renewable power integration with storage can support future carbon-free utility and has several significant impacts including increasing the value of renewable generation to the grid, improving the peak-load response, and balancing the electricity supply and demand. Long-duration energy storage (10–100 hours duration) can potentially complement the reduction of fossil-fuel baseload generation that otherwise would risk grid security when a large portion of grid power comes from variable renewable sources. Current energy storage methods based on pumped storage hydropower or batteries have many limitations. Thermal energy storage (TES) has unique advantages in scale and siting flexibility to provide grid-scale storage capacity. A particle-based TES system has promising cost and performance for the future growing energy storage needs. This paper introduces the system and components required for the particle TES to be technically and economically competitive. A technoeconomic analysis based on preliminary component designs and performance shows that the particle TES integrated with an efficient air-Brayton combined cycle power system can provide power for several days by low-cost, high-performance storage cycles. It addresses grid storage needs by enabling large-scale grid integration of intermittent renewables like wind and solar, thereby increasing their grid value. The design specifications and cost estimations of major components in a commercial scale system are presented in this paper. The cost model provides insights for further development and cost comparison with competing technologies.

Preliminary Component Design and Cost Estimation of a Novel Electric-Thermal Energy Storage System Using Solid Particles

2021 ◽  
pp. 1-40
Author(s):  
Zhiwen Ma ◽  
Xingchao Wang ◽  
Patrick Davenport ◽  
Jeffrey Gifford ◽  
Janna Martinek
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Cost Estimation ◽  
Power Plants ◽  
Low Cost ◽  
Combined Cycle ◽  
Solid Particles ◽  
And Performance

Abstract Energy storage will become indispensable to complement the uncertainty of intermittent renewable resources and to firm the electricity supply as renewable power generation becomes the mainstream new-built energy source and fossil fuel power plants are phased out to meet carbon neutral utility targets. Current energy storage methods based on pumped storage hydropower or batteries have many limitations. Thermal energy storage (TES) has unique advantages in scale and siting flexibility to provide grid-scale storage capacity. A particle-based TES system is projected to have promising cost and performance characteristics to meet the future growing energy storage needs. This paper introduces the system and components required for particle TES to become technically and economically competitive. The system integrates electric particle heaters, particle TES within insulated concrete silos, and an efficient air-Brayton combined cycle power system to provide power for storage durations up to several days via low-cost, high-performance storage cycles. Design specifications and cost estimation of major components in a commercial-scale system are presented in this paper. A technoeconomic analysis based on preliminary component designs and performance indicates that particle TES integrated with an air-Brayton combined cycle power system has a path to achieve the targeted levelized cost of storage of 5¢/kWh-cycle at a round-trip efficiency of 50% when taking low-cost energy-specific components and leveraging basic assets from existing thermal power plants. The cost model provides insights for further development and economic potentials for long-duration energy storage.

Current and Future Technologies for Natural Gas Combined Cycle (NGCC) Power Plants

2013 ◽  
Author(s):  
Norma J. Kuehn ◽  
Kajal Mukherjee ◽  
Paul Phiambolis ◽  
Lora L. Pinkerton ◽  
Elsy Varghese ◽  
...  
Keyword(s):  
Natural Gas ◽  
Power Plants ◽  
Combined Cycle ◽  
Natural Gas Combined Cycle ◽  
Future Technologies
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