Plant Interaction Indices Based on Experimental Plant Performance Data

2010 ◽  
pp. 17-38 ◽  
Author(s):  
Zaal Kikvidze ◽  
Cristina Armas
Keyword(s):  
Performance Data ◽  
Plant Performance ◽  
Experimental Plant ◽  
Plant Interaction

Modeling of (Cogeneration) Power Plants on Time-Dependent Power Demands of the Consumer

1996 ◽  
Vol 118 (2) ◽  
pp. 353-358 ◽  
Author(s):  
M. Witzani ◽  
P. Pechtl
Keyword(s):  
Fuel Consumption ◽  
Energy Demand ◽  
Performance Model ◽  
Performance Data ◽  
Plant Performance ◽  
Plant Operation ◽  
Load Demand ◽  
Demand Curves ◽  
Economic Parameters ◽  
Real Plant

This paper presents a planning tool where rigorous plant performance models are used to produce accurate plant performance data reflecting real plant operation under the loads specified by load demand curves. Cumulative figures such as total fuel consumption and production efficiency serve as the basis for a subsequent detailed economic analysis. Basic inputs to the model are the energy demand curves for a specific site on a daily, hourly, or even per minute basis. The plant performance model takes into account the varying load levels, ambient conditions, fuel price, and revenues from electric power delivered off-site. The load/performance simulator calculates plant performance and basic economic parameters at each point in time of the load demand curve to exactly match the given energy demand (Fig. 1). The results are critical economic data like cumulated fuel consumption and expenses, total energy production, and overall averaged plant efficiency. The performance model delivers detailed plant performance data on an overall plant as well as component level. The results reflect real plant operation under all varying conditions, hence produce highly significant performance and economic parameters.

scholarly journals Effect of a regenerator on hybrid solar gas turbine performance in Barranquilla, Colombia

2021 ◽  
Vol 2139 (1) ◽  
pp. 012012
Author(s):  
F Moreno-Gamboa ◽  
J C Acevedo-Paéz ◽  
D Sanin-Villa
Keyword(s):  
Solar Radiation ◽  
Combustion Chamber ◽  
Gas Turbine ◽  
Plant Performance ◽  
Maximum Temperature ◽  
Experimental Plant ◽  
Power Cycle ◽  
Turbine Performance ◽  
Central Receiver ◽  
Solar Plant

Abstract A thermodynamic analysis of a hybrid gas turbine solar plant, represented in three basic subsystems related to the power cycle, the combustion chamber subsystem, and the solar concentrator subsystem, allows evaluating the performance of a hybrid cycle from a reduced number of parameters, which include energy losses in each of its components. The solar radiation values are estimated with an evaluated and validated theoretical model, the combustion chamber uses natural gas as fuel and the numerical values of the system are taken from the Solugas experimental plant in Spain. This work presents an integrated model that allows to estimate the operation of a hybrid solar Brayton power plant in any place and day of the year. The evaluation of the plant in Barranquilla, Colombia is shown from the influence of the regenerator has on the plant performance and solar concentrating system. The results show that the regenerator can increase the overall efficiency of the plant by 29% and allows reaching a maximum temperature of the central receiver of the concentrator of 1044 K at noon, when solar radiation is maximum.

Influence of Ambient Conditions on an Aeroderivative Gas Turbine Based Cogeneration Plant — A Comparison of Numerical Simulation With Field Performance Data

2000 ◽  
Author(s):  
Carlo Carcasci ◽  
Bruno Facchini ◽  
Francesco Grillo
Keyword(s):  
Numerical Simulation ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Field Performance ◽  
Performance Data ◽  
Plant Performance ◽  
Air Cooling ◽  
Ambient Conditions ◽  
Compressor Inlet

Gas turbine performances are directly related to outside conditions. The use of gas turbines in combined gas-steam power plants, also applied to cogeneration, increases performance dependence by outside conditions, because plants boundary conditions become more complex. In recent years, inlet air cooling systems have been introduced to control air temperature and humidity at compressor inlet resulting in an increase in plant power and efficiency. In this paper, the dependence of outside conditions for an existing cogenerative plant, located in Tuscany (Italy), is studied. The plant is equipped with two GE-LM6000 aeroderivative gas-turbines coupled with a three pressure level heat recovery steam generator, cogenerative application being related to the industrial district. The ambient temperature has been found to be the most important factor affecting the plant performance, but relative air humidity variation also has considerable effects. The field performance data are compared with a numerical simulation. The simulation results show a good agreement with the field performance data. The simulation allows evaluation of design and off-design plant performance and can become a useful tool to study the outside condition influence on power plant performance.

Assessment of Gas Turbine and Combined Cycle Power Plant Performance Degradation

2011 ◽  
Author(s):  
Nina Hepperle ◽  
Dirk Therkorn ◽  
Ernst Schneider ◽  
Stephan Staudacher
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Power Plants ◽  
Heat Rate ◽  
Performance Degradation ◽  
Empirical Method ◽  
Combined Cycle ◽  
Performance Data ◽  
Plant Performance ◽  
Water Steam

Recoverable and non-recoverable performance degradation has a significant impact on power plant revenues. A more in depth understanding and quantification of recoverable degradation enables operators to optimize plant operation. OEM degradation curves represent usually non-recoverable degradation, but actual power output and heat rate is affected by both, recoverable and non-recoverable degradation. This paper presents an empirical method to correct longterm performance data of gas turbine and combined cycle power plants for recoverable degradation. Performance degradation can be assessed with standard plant instrumentation data, which has to be systematically stored, reduced, corrected and analyzed. Recoverable degradation includes mainly compressor and air inlet filter fouling, but also instrumentation degradation such as condensate in pressure sensing lines, condenser or bypass valve leakages. The presented correction method includes corrections of these effects for gas turbine and water steam cycle components. Applying the corrections on longterm operating data enables staff to assess the non-recoverable performance degradation any time. It can also be used to predict recovery potential of maintenance activities like compressor washings, instrumentation calibration or leakage repair. The presented correction methods are validated with long-term performance data of several power plants. It is shown that the degradation rate is site-specific and influenced by boundary conditions, which have to be considered for degradation assessments.

scholarly journals Rhododendron Performance Evaluation in Maine

1993 ◽  
Vol 3 (4) ◽  
pp. 445-448
Author(s):  
Paul E. Cappiello
Keyword(s):  
Performance Evaluation ◽  
Ornamental Plant ◽  
Performance Data ◽  
Performance Evaluations ◽  
Winter Survival ◽  
Plant Performance ◽  
Disease Rating ◽  
Woody Ornamental Plant ◽  
Woody Ornamental

For nearly 30 years, the Univ. of Maine has been conducting woody ornamental plant performance evaluations. While there are a number of focus collections under evaluation, the Rhododendron collection is one of the central features of the program. This report offers performance data for more than 100 specimens grown at the Lyle E. Littletield Ornamentals Trial Garden on the campus of the Univ. of Maine. Winter survival, folk disease rating, fall foliage color and effectiveness, and flowering dates are included.

scholarly journals The choice of plant provenance for ecological restoration affects pollinator network

2020 ◽  
Author(s):  
Anna Bucharova ◽  
Christian Lampei ◽  
Malte Conrady ◽  
Emilia May ◽  
Janis Matheja ◽  
...  
Keyword(s):  
Species Composition ◽  
Ecological Restoration ◽  
Plant Communities ◽  
Flowering Phenology ◽  
The Other ◽  
Plant Performance ◽  
Experimental Plant ◽  
Pollinator Visitation ◽  
Selection Of

AbstractBackgroundThe selection of plant provenance for ecological restoration is an intensively debated topic. Throughout this debate, arguments mostly focus on plant performance, but little attention is paid to the effects of provenance on other members of the restored ecosystem. On the other hand, in restoration projects that focus specifically on supporting interacting biota, for example flower stripes among fields to support pollinators, the provenance choice is often not considered, partly because the effect of provenance on pollinators is unknown. In this pioneering case study, we tested whether pollinators differentiate between experimental plant communities of different provenances.MethodsWe established experimental plant communities with the same species composition but with plants originating from three different provenances. We then recorded plant phenology and observed pollinators and flower visitors interacting with these experimental communities and related the pollinator visitation to the provenance identity.ResultsThe provenances of the experimental plant communities had a strong and significant effect on the diversity and abundance of flower-pollinator interactions, with one provenance interacting twice as often as the other two provenances. The effect was driven by the differences in flowering phenology among provenances.Synthesis and applicationPlant provenances substantially differ in their interactions with local pollinators. Therefore, the selection of plant provenance should be considered when planning restoration projects for the support of pollinators.

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