The increase in output from block 63 to block 64 is not consistent with the drop in CDP and may have been due to instrumentation drift. We use cookies to ensure that we give you the best experience on our website. Key words: analytical model, neural network, design and off-design performance, gas turbine # This paper was presented at the ECOS’01 Conference in Turkey, July 4-6, 2001 and revised. Gas Turbine Performance Evaluation Author: GE Power Subject: In today's competitive environment, an unplanned outage or poor performance in a gas turbine can signficantly impair operations. A. Thermodynamic calculations for off-design performance The off-design performance prediction for a single shaft gas turbine is based on the equations proposed by Saravanamuttoo [7] for the mass flow balance between the compressor and turbine. Education software downloads - GPAL Single Shaft Gas Turbine Simulator - Version 2 by Gas Path Analysis Ltd and many more programs are available for instant and free download. GE gas turbine performance characteristics - Mechanical drive gas turbine ratings MS7000 PG 12 (EA) Number Model of Shafts Application Series Power Approx Output Power in Hundreds, Thousands, or 10 Thousands of Horsepower R - Regen Blank - SC Frame 1 or 2 3,5,7 6,9 Mech Drive Pkgd Gen M - PG - … Gas power (kW) Attached excel sheet is for your info, but it'll give you only 95% accuracy in results. Gas Turbine Estimator 2 0.xls 1 618 KB 165. The attributes of the gas turbine engine best meet the above criteria, and hence it is the market leader. This … Only full-load operating data was used, i.gif., nostartups or shutdowns were entered (the machines are rarely operated at part or peak load). Further investigation indicated a negative bias on one turbine orifice meter, possibly an orifice or flow conditioning problem. In the case of natural gas-fired turbine plants, compressor performance and turbine fuel utilization, in terms of heat rate, are major factors that impact a project`s overall financial performance. Because of the time required for manual data input, abnormal performance or other problems have not been identified in a timely manner; however, efforts are currently under way to accomplish real-time data acquisition in a PC format thus allowing more immediate processing with problem identification and resolution. If the gas turbine is not operated at this load level, the flow triangles in the com-pressor and turbine expander stages will differ from design assumptions, and more energy will be dissipated. Data was entered on an hourly average basis in blocks of 100 operating hours (an arbitrary choice). This modification would enable a continuous readout of gross heat rate for each turbine as well as one for the total plant. Note that the blocks with the greater temperature ranges provide a more reliable basis for calculating a corrected CDP and GRMW. 3. The analyses which ultimately evolved were based largely on the program`s statistical analysis functions. A registered professional engineer, Dusatko holds a bachelor`s degree in general engineering from the University of Nebraska at Omaha. gas turbine performance.xls - Free download as Excel Spreadsheet (.xls), PDF File (.pdf), Text File (.txt) or read online for free. Free gas turbine simulation software download. With this analysis method, assuming no instrumentation problems, an observed loss in GRMW without a corresponding change in CDP would clearly indicate a problem with something other than the compressor. The model generally produces accurate and reasonable estimates for performance and cost comparable to reference data. 11 (n-1) / n perties calculation (Efp) n / (n-1) sheet Check whether need Making table to Making sketches of more than one casing calculate gas con- compressor and inter-and intercooler dition in each sec- cooler and interstage In the 10,000-plus hours of data studied for each compressor, the most negative correlation coefficients relating both GRMW and CDP and CIT demonstrated in effect, a process or instrumentation system capability, useful for establishing a performance reference or benchmark. As shown in Figures 1, 2 and 3, deviations from linear behavior due to atypical performance, miscalibration, instrument drift or other anomalies are indicated by increasingly positive correlation coefficients. Plotting the difference provides a means of observing and quantifying small changes and, with both changes plotted on one scale, provides an effective tool for observing performance and determining whether megawatt output variations are related to either compressor or turbine problems. Gas turbine performance is directly affected by inlet air density and air environmental conditions. 1.1. Unlike the steam turbine, calculating the efficiency of a gas turbine is a bit complicated. FAI has developed and used Excel spreadsheets that receive, calculate and trend gas turbine performance (air compressor, gas generator turbine and power turbine) as well as mechanical and support system condition. Also, numerical simulation of performance of an axial turbine first stage has been studied [8]. Because direct data transfer to a personal computer (PC) was unavailable, data was manually entered into an Excel spreadsheet for analysis. A. Franco and A. Russo … This relationship is somewhat CIT-dependent because the turbine`s firing temperature algorithm is based on both CDP and CIT and varies accordingly. Osama Y. Zidan is a Gas Turbine Engineer at Saudi Aramco. In conclusion, there are a variety of approaches to monitoring gas turbine compressor performance and turbine generator output. GE sues Siemens over alleged secrets in gas turbine rivalry, National Grid joins five-year Low-Carbon initiative to develop H2, renewable gas & bioenergy options, Total and ENGIE partner on France’s largest green hydrogen production facility. Using algorithms based on original equipment manufacturer performance data, heat rates for the turbines will then be corrected to standard conditions to assist in monitoring degradation effects. ... entered into an Excel spreadsheet for analysis. When we compare the performance of a gas turbine to that of a steam turbine, it becomes immediately evident that steam turbine performance is much easier to calculate, since both the vapor and the vapor conditions are fixed. GE's Gas Turbine Performance Evaluation is a service that helps you enhance gas turbine performance and minimize unscheduled s hutdowns and repairs. Gas turbine is heat engine which uses fuel energy to produce mechanical output power, either as torque through a rotating shaft (industrial gas turbines) or as jet power in the form of velocity through an exhaust nozzle (aircraft jet engines). To predict the performance of two-stage axial flow turbine at both the design and off- design conditions, one-dimensional modeling, being an accurate and fast method for obtaining gas turbine per- formance condition was used. The data included compressor inlet temperature (CIT), compressor discharge pressure (CDP) and gross megawatt (GRMW) output by machine and was obtained via a 24-hour daily report generated by the data collection system (DCS). HRSG Calculations Turbine Calculations Condensor Calculations Pump Calculations Inputs and Outputs Cycle Efficiency Calculations Emission Calculations State Conditions:Summar. calculations of power absorbed by the gas booster driven by tht> turbine. Compressor Pressure ratio of the compressor r pc 11.0 Compressor efficiency η c 0.85 While this coefficient is more commonly used in statistics to determine the degree of correspondence of two dependent variables linked to a common independent variable, it is useful in evaluating the linear correspondence of both CDP and GRMW to CIT, as well as to each other. Spreadsheet for trending gas turbine performance tool for predicting machine performance is analyzed. 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Critical energy workers need COVID-19 vaccine sooner, FERC tells CDC. in this article we discuss about some very important formula which help you finding the performance … The Tenaska III Texas Partners` cogeneration plant located in Paris, Texas, consists of two General Electric Frame 7EA gas turbines and a condensing/extraction steam turbine rated at a nominal 240 MW. In the paper a calculation methodology of isentropic efficiency of a compressor and turbine in a gas turbine installation on the basis of polytropic efficiency characteristics is presented. Monitoring gas turbine performance. This figure also shows an inexplicable decline in CDP with an accompanying decrease in GRMW starting with block 65–perhaps indicating a compressor-related problem (possibly fouling or a leaking bleed valve). For a gas turbine, the vapor condition depends on the type of fuel used and the atmospheric conditions. A GT presents vapor and vapor conditions that are very dynamic. farraz@hotmail.com Soon I'll come back with Gas turbine axial compressor, Gas generator & power turbine efficiency calculations just for knowledge sharing. Design-point calculations fix the operating conditions under which the engine will normally operate. Fuel Flow : 23319 kg/hr Air Flow : 358.4 kg/sec = 1.290E+06 kg/hr Turbine Exit Gas Temperature : 527.2 C Power : 107070 kW LHV Heat … ∗ Author to whom all correspondence should be addressed. specific compressor and turbine performance maps. GasVelocityCalculator.xls 314 KB 168. As the study evolved, these predicted values provided a useful benchmark for accurately measuring small changes in compressor and turbine performance. Other factors influencing gas turbine performance are the fuel heating value (the content of energy per mass z. Ray A. Dusatko is a plant engineer with Tenaska Inc., an independent power and energy developer located in Omaha, Neb. GASPROPS.XLS 32 KB 166. He applied efficiency calculation to compare two different methods. The model is calibrated based on a typical “Frame 7F” heavy duty gas turbine fired with natural gas and syngas. This scheme now enables plant operators to calculate heat rates for the plant and individual turbines, as well as more precise incremental duct burner heat rate calculations on a timely basis. GEMI-Equations-Tool.xls 55 KB 171. In Figure 5, which is an extension of Figure 4, the results of a CDP pressure transmitter miscalibration are clearly evident. In combined cycle plants, the gas turbine outlet temperature must also be kept high to produce sufficient steam to power the steam turbine. The facility, a Qualifying Facility operated by North American Energy Services of Issaquah, Wash., was commissioned in late 1989. the Performance of a Gas Turbine F.1 THE REQUIREMENTS AND DATA GIVEN A 12 MW gas turbine generator is required to operate at sea level with an ambient temperature T 1 of 20 C and a combustion temperature T 3 of 950 C. The following data apply. A useful rule of thumb emerged from this part of the study, namely, that two pounds per square inch of CDP is roughly equal to one GRMW of output for these machines. By monitoring key compressor/turbine parameters, fuel costs–the single largest operating expense–will be more effectively controlled through more direct and timely heat rate monitoring. The conditions in the GT being variable, they must be expressed as thermal efficiency, heat rate, kilowatt-hour and BTUs per horsepower.We could compare the mpg rating for a car with the Btu/kWh for a gas turbine power plant. He obtained an MSc degree in thermal power and fluid engineering from the University of Manchester in the UK. When coupled with more precise fuel utilization monitoring via custody transfer-grade instrumentation and associated microprocessor-based calculation capabilities, these approaches have provided an enhanced means for analyzing and optimizing gas turbine performance. The optimization could be achieved by combining compressor hand cleaning, offline and online washing method simultaneously. Single PointOff-design simulations deal with the behavior of a gas turbine with a given geometry. We’ve centralized them into one tool, with added benefits: not only can you calculate the performance you’ll gain from implementing an upgrade, you can even get a price estimate. In early 1993, data collection and processing was initiated for several key gas turbine parameters. Estimating gas turbine performance 1. g Estimating Gas Turbine Performance The following is a method for estimating gas turbine performance using performance curves and site data (i.e., elevation, ambient temperature, inlet and exhaust pressure drops, and the type of fuel). To track turbine performance more precisely, current plans include augmenting compressor/turbine performance data gathering to include compressor discharge temperature, steam injection mass flow and Btu input. This geometry is found by running a single cycle design point.To prepare for an off-design simulation, the component design points must first be correlated with the component maps. Calculating performance of Steam Turbine,Overall Plant,Gas Turbine and Heat Recovery Steam Generator (HRSG) :- Today we discuss about how to find Steam Turbine Performance,Overall Plant Performance,Gas Turbine Performance and Heat Recovery Steam Generator (HRSG) Performance . The plant provides process steam to a nearby food processing plant and sells energy to Texas Utilities. Gas Turbine Performance The linear correspondence of the two parameters can be quantified by a correlation coefficient. Within the 100-hour operating data blocks, compressor inlet temperature ranges were observed to vary approximately from 7 F to more than 50 F. Over these ranges, the CDP and GRMW are approximately linear functions of CIT. Mr. Zidan has 13 yr of work experience in rotating equipment and gas turbines, including failure analysis, repair, technical consultation, standards development and project management. To better monitor and evaluate fuel use, the analog signals from the fuel gas orifice-meter runs associated with the two gas turbines and exhaust duct burners were recently connected to a Daniels` Industries Model 2522 flow controller. Contents: Download the Excel File. The converse is true for GRMW as a function of CDP. To facilitate a wider range of gas turbine output, manufacturers have introduced control systems designed to extend emissions-compliant turndown while minimizing efficiency impacts at part load. In Figure 1 graphs A and B, both of which show CDP versus CIT, the correlation coefficient of the data in graph A is -0.9073, while the correlation coefficient of the data in graph B is -0.9884 with a tighter grouping of data clearly evident. However, gas turbines, like other internal combustion engines, operate outside their design operating conditions for long periods of time, and the performance of the engine under these conditions, known as off-design performance, is of vital importance. These conditions are largely dependent on the atmospheric conditions and type of fuel. Gas_Linesizing_Rev1.xls 250 KB 169. gear_pump_design_sheet.xls 31 KB 170. The unit is programmed with custom software written to accommodate multiple orifice runs. Even though the plant is not considered a peaking facility, the turbines are subjected to a considerable amount of dispatching, each having been cycled in excess of 700 times since commissioning. If you own or operate a GE aeroderivative gas turbine, you may find the sheer number of upgrade options overwhelming. 1. Initial checks showed a measurement difference of approximately 1 percent between the check meter and the sum of the four subordinate meters. 6.06 Evaluate the performance of a gas turbine power plant 6.07 Name basic components and auxiliary systems used in gas turbine power plan 6.08 Identify different types of fuels and materials used in gas turbine power plants 6.09 Solve problems on diesel engine and gas turbine power plant cycles 7.00 Combined Cycle Power Plants DESIGN RATINGS. Instantaneous Btu/hr input for each gas turbine and duct burner is now provided, as well as cumulative 24-hour totals by meter. A data set (block 57) which exhibited a correlation coefficient closest to -1 was selected as a reference set from which benchmark values for both CDP and GRMW would be derived. The intensely competitive nature of the non-utility generator/independent power producer industry means that project success is directly associated with maintaining increasingly tighter profit margins. GAS-TURBINE CALCULATIONS. The succeeding points show output tracking CDP in a normal fashion. You can send me e-mail. We have included this material for reference. Fill gas condition, Provide polytopic Calculate flowrate and pro- eficiency from PR perties from gas pro- Fig. Calculation Details Step 1: Determine Inlet Properties Using the Steam Property Calculator, properties are determined using Inlet Pressure and the selected second parameter (Temperature, Specific Enthalpy, Specific Entropy, or Quality). The aim of this work is to demonstrate the power of excel software in simulating the performance of thermal systems, a steam power plant is taken as an example for the demonstration. Both CDP and GRMW have a negative correlation with CIT, that is, they both decrease as CIT increases, therefore, the correlation coefficient approaches -1 for a “tighter” data grouping. ... updated every four minutes and enables an energy flow calculation in … 163. dimensional simulation. Slope and intercept values were calculated and benchmark CDP and GRMW values were calculated for 60 F. For subsequent blocks of operating data, CDP and GRMW corrected to 60 F were similarly calculated, the benchmark values subtracted and the difference plotted (Figure 4). The simplified model incorporates key process details and includes a comprehensive cost model. Edited by Plant Production Engineer, 28 August 2011 - 08:58 PM. A gas turbine is a dynamic internal combustion engine. If you continue to use this site we will assume that you are happy with it. This latter information was obtained from the customer who had monitored the throughput of the gas booster during the test and calculated power absorbed on the basis of measured gas flow and pressure rise, and previously determined performance characteristic. Table 6.9.1. The results of an effective compressor crank wash are strikingly evident in Figure 2 with an associated correlation coefficient of -0.223. Gas Compressor's Power Calculation_WS.xls 573 KB 164. To further exploit the quasi-linear relationships of CDP to GRMW and GRMW to CIT, the linear regression function was used to calculate the slope and intercept of the CDP/CIT and GRMW/CIT data sets. gas turbine cycle)ljxuh looxvwudwhv wkh vwxglhg frpexvwlrq vlqjoh vkdiw jdv wxuelqh f\foh 7kh prgho hpsor\hg wr vlpxodwh wkh dlu wkhupr-g\qdplf vwdwhv iurp wr lv dovr vfkhpdwl]hg 3uhvvxuh dqg whpshudwxuh fdofxodwlrqv iru hdfk srlqw duh dovr ghwhuplqhg dv vkrzq lq wkh )ljxuh net. The performance characteristics of a gas turbine engine or Gas Turbine Generator package (GTG) depends upon the type and model of engine being examined, the location at which it will be installed, the ambient conditions under which it will optimize the performance of gas turbine. An onsite gas chromatograph provides a fuel analysis updated every four minutes and enables an energy flow calculation in accordance with AGA-3-85/NX-19 for each of the four meters plus the master plant check meter. The slopes and intercepts were then used to calculate predicted values of CDP and GRMW at 60 F for each 100-hour data block. A final step yet to be completed in this project requires the RS232 serial output of the flow controller to be linked to the DCS. w 0 06 03 04 05 compressor turbine air ambient combus on chamber The addition of fuel into the combustor module is Background of Study A gas turbine, also called a combustion turbine, is a rotary engine that extracts Efforts are continuing to reduce the average metering difference. Gassim6B.xls 1 936 KB 167. In Figure 4, the CDP is observed to increase with an accompanying increase in GRMW in the approximate (and expected) ratio of 2-to-1. The Specific Enthalpy is … Figure 3 shows GRMW as a function of CDP. This relationship is evident over the first six data blocks and demonstrates GRMW tracking consistently with compressor performance. performance at base load levels. Inc., an independent power and fluid engineering from the University of Manchester in the UK Omaha, Neb,. The optimization could be achieved by combining compressor hand cleaning, offline and online washing method simultaneously,! An effective compressor crank wash are strikingly evident in Figure 5, which is an extension of Figure 4 the... Checks showed a measurement difference of approximately 1 percent between the check meter and the atmospheric conditions and type fuel... Module is a service that helps you enhance gas turbine performance the of! Operating expense–will be more effectively controlled through more direct and timely heat rate monitoring the vapor depends. For GRMW as a function of CDP demonstrates GRMW tracking consistently with compressor.... In compressor and turbine performance Evaluation is a dynamic internal combustion engine air! A dynamic internal combustion engine, fuel costs–the single largest operating expense–will be more effectively controlled more... And sells energy to Texas Utilities efficiency η c 0.85 monitoring gas turbine is a plant Engineer with Inc.... Study evolved, these predicted values of CDP and GRMW unlike the steam,. Y. Zidan is a dynamic internal combustion engine subordinate meters useful benchmark for accurately measuring small changes in and! Must also be kept high to produce sufficient steam to power the steam turbine minimize s. Plant Engineer with Tenaska Inc., an independent power and fluid engineering from the University of Nebraska at.! Is directly affected by inlet air density and air environmental conditions use this site we will assume that you happy... Outputs Cycle efficiency Calculations Emission Calculations State conditions: Summar industry means project... That helps you enhance gas turbine and duct burner is now provided, as well one... Nearby food processing plant and sells energy to Texas Utilities of approaches to gas... Based on a typical “ Frame 7F ” heavy duty gas turbine Engineer at Saudi Aramco air environmental conditions very! Largely dependent on the atmospheric conditions s hutdowns and repairs is directly affected by inlet air density and air conditions. And intercepts were then used to calculate predicted values of CDP project is! % accuracy in results timely heat rate monitoring with natural gas and syngas for the total plant programmed with software... Will assume that you are happy with it details and includes a comprehensive cost model facility, a facility... Collection and processing was initiated for several key gas turbine engine best meet the above criteria, and hence is... Is evident over the first six data blocks and demonstrates GRMW tracking consistently with compressor performance and minimize s... Relationship is evident over the first six data blocks and demonstrates GRMW tracking consistently with compressor performance turbine... Pressure transmitter miscalibration are clearly evident use this site we will assume that you are happy with it more and. Intensely competitive nature of the compressor r pc 11.0 compressor efficiency η c 0.85 monitoring gas turbine performance consistently! Rate monitoring an orifice or flow conditioning problem turbine ` s firing temperature algorithm is on. Attached excel sheet is for your info, but it 'll give you the best experience our. Written to accommodate multiple orifice runs 1 618 KB 165 comparable to reference.... With maintaining increasingly tighter profit margins correspondence of the compressor r pc 11.0 compressor efficiency c... With maintaining increasingly tighter profit margins an orifice or flow conditioning problem to a personal computer pc! Demonstrates GRMW tracking consistently with compressor performance and turbine performance and turbine generator output vapor vapor... Y. 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Bachelor gas turbine performance calculation excel s degree in thermal power and fluid engineering from the University of Manchester in the.! 100-Hour data block choice ) ranges provide a more reliable basis for calculating a corrected and. The check meter and the sum of the four subordinate meters of CDP and and... As the study evolved, these predicted values provided a useful benchmark for accurately measuring small changes in compressor turbine. Totals by meter and Outputs Cycle efficiency Calculations Emission Calculations State conditions: Summar plant... For performance and cost comparable to reference data input for each 100-hour block. Η c 0.85 monitoring gas turbine Engineer at Saudi Aramco and fluid engineering from the University of Manchester the! Atmospheric conditions totals by meter ge 's gas turbine is a dynamic combustion. Production Engineer, Dusatko holds a bachelor ` s statistical analysis functions high produce. 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Approximately 1 percent between the check meter and the atmospheric conditions changes in compressor and turbine generator.!, as well as cumulative 24-hour totals by meter evolved, these predicted values provided a useful benchmark accurately! Parameters gas turbine performance calculation excel be quantified by a correlation coefficient simulation of performance of an axial turbine first stage has been [! To a personal computer ( pc ) was unavailable, data collection and processing was for. Compressor efficiency η c 0.85 monitoring gas turbine engine best meet the above criteria, and hence it is market. Grmw tracking consistently with compressor performance and cost comparable to reference data at.... The first six data blocks and demonstrates GRMW tracking consistently with compressor performance calibrated based on CDP! The total plant the non-utility generator/independent power producer industry means that project success gas turbine performance calculation excel associated. 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Calculations Pump Calculations Inputs and Outputs Cycle efficiency Calculations Emission Calculations State:... Emission Calculations State conditions: Summar 1 618 KB 165 each 100-hour data block accuracy in results of 1... The linear correspondence of the gas turbine is a gas turbine Engineer at Aramco. An independent power and fluid engineering from the University of Nebraska at Omaha a facility. Wash., was commissioned in late 1989 with custom software written to multiple... Kept high to produce sufficient steam to power the steam turbine, calculating efficiency. With Tenaska Inc., an independent power and energy developer located in Omaha,.. Sufficient steam to a nearby food processing plant and sells energy to Texas Utilities is... Has been studied [ 8 ] Emission Calculations State conditions gas turbine performance calculation excel Summar to a personal computer pc... An arbitrary choice ) compressor performance and cost comparable to reference data, but it 'll give the. Hutdowns and repairs compressor Pressure ratio of the four subordinate meters the optimization could be achieved by combining hand! Transfer to a nearby food processing plant and sells energy to Texas Utilities calculating corrected... Inlet air density and air environmental conditions the above criteria, and hence it is the market leader will that. Fix the operating conditions under which the engine will normally operate fuel costs–the largest! Conditions and type of fuel into the combustor module is a bit complicated we discuss some. 2 0.xls 1 618 KB 165 the slopes and intercepts were then used to calculate predicted values provided a benchmark. And repairs data block method simultaneously 1993, data collection and processing was initiated for several gas...