scholarly journals Operational Tests Results of the Naval Gas Turbines Operated by the Polish Navy

2018 ◽  
Vol 212 (1) ◽  
pp. 85-103
Author(s):  
Bogdan Pojawa
Keyword(s):  
Gas Turbines ◽  
Technical Condition ◽  
Naval Academy ◽  
Energy Research ◽  
Idle Mode ◽  
Load Variations ◽  
Start Up ◽  
Operational Diagnostics ◽  
Operational Tests ◽  
Near Future

Abstract This article is a continuation to the theme of the article Operational diagnostics synthesis of the naval gas turbines operated by the Polish Navy published in SJ of PNA No. 1/2017. This article presents examples of results of energy research carried out by the Polish Naval Academy in the years 1985–2016, for the purpose of operational diagnostics of this type of engine, operated by the Polish Navy. The research conducted since 1985 covered four types of naval gas turbines (DE 59, DR 76, DR 77 and LM 2500), with a total of 24 engines. Currently in operation there are four LM 2500 type engines. In the near future, another LM 2500 engine will commence operations, along with a project 661M patrol ship. The energy research covers the engine start-up process, their operation in idle mode and within the whole range of load variations, as well as the process of engine stopping. The article presents examples of characteristics specific to the above processes, determined based on the results of studies of individual types of engines. Currently ongoing studies allow for constructing strategies for naval gas turbines, operated in the Polish Navy, according to technical condition.

scholarly journals Energetic state parameters measurements of LM 2500 naval gas turbine for modeling and simulation purposes

2017 ◽  
Vol 171 (4) ◽  
pp. 215-221
Author(s):  
Bogdan POJAWA
Keyword(s):  
Modeling And Simulation ◽  
Gas Turbines ◽  
Idle Mode ◽  
Load Variations ◽  
Start Up ◽  
Energetic State ◽  
Simulation Results ◽  
Energy Processes ◽  
Near Future ◽  
Engine Start

This article presents examples of results of energetic state parameters measurements of LM 2500 naval gas turbines operated by the Polish Navy. Currently in operation there are four LM 2500-type engines. In the near future, another LM 2500 engine will commence operations, along with a project 661M patrol ship. The energetic state parameters measurements covers the engine start-up process, their operation in idle mode and within the whole range of load variations, as well as stoppage of engine process. The article presents examples of characteristics specific to the above processes, determined based on the results of studies of this kind of engines. The results of these studies will be used to verify the modeling and simulation results of the internal energy processes occurring in this kind of engine.

scholarly journals Operational diagnostics synthesis of the naval gas turbines operated by the Polish Navy

2017 ◽  
pp. 75-98
Author(s):  
Bogdan Pojawa
Keyword(s):  
Gas Turbines ◽  
Test Equipment ◽  
Naval Academy ◽  
Operational Parameters ◽  
Energy Research ◽  
Article Analysis ◽  
Operational Diagnostics ◽  
Near Term ◽  
Starting Process ◽  
Range Of Variation

The article presents overall energy research conducted by the Polish Naval Academy for the purpose of operational diagnostics of the naval gas turbines operated by the Polish Navy. In this article are presented the purpose and methodology of research, identification of the object of research and test equipment used for research. The research results will be presented in another article Analysis operational parameters of the naval gas turbines. As far as the Polish Navy vessels are concerned, there were four types of the naval gas turbines operated in the years 1983–2003: DE 59, DR 76, DR 77 and LM 2500. Currently, since 2013, there are four LM 2500 engines in service, which drive ‘Oliver Hazard Perry’ type missile frigates. In the near term, an another LM 2500 engine along with a 661M type patrol boat will become operational. Within the framework of energy research, the engine starting process, running on idle and in the whole range of variation of load as well as the process of stopping the engines will be placed under systematic operational surveillance.

Dynamic Simulation of Full Start-Up Procedure of Heavy Duty Gas Turbines

2001 ◽  
Author(s):  
J. H. Kim ◽  
T. W. Song ◽  
T. S. Kim ◽  
S. T. Ro
Keyword(s):  
Gas Turbines ◽  
Guide Vane ◽  
Inlet Guide Vane ◽  
Stable Operation ◽  
Heavy Duty ◽  
Operating Characteristics ◽  
Fully Implicit ◽  
Start Up ◽  
Full Speed ◽  
Stage Characteristic

A simulation program for transient analysis of the start-up procedure of heavy duty gas turbines for power generation has been constructed. Unsteady one-dimensional conservation equations are used and equation sets are solved numerically using a fully implicit method. A modified stage-stacking method has been adopted to estimate the operation of the compressor. Compressor stages are grouped into three categories (front, middle, rear), to which three different stage characteristic curves are applied in order to consider the different low-speed operating characteristics. Representative start-up sequences were adopted. The dynamic behavior of a representative heavy duty gas turbine was simulated for a full start-up procedure from zero to full speed. Simulated results matched the field data and confirmed unique characteristics such as the self-sustaining and the possibility of rear-stage choking at low speeds. Effects of the estimated schedules on the start-up characteristics were also investigated. Special attention was paid to the effects of modulating the variable inlet guide vane on start-up characteristics, which play a key role in the stable operation of gas turbines.

scholarly journals Comparative analysis of damage to sewer rehabilitation coatings

2018 ◽  
Vol 45 ◽  
pp. 00041
Author(s):  
Andrzej Kuliczkowski ◽  
Stanisław Nogaj
Keyword(s):  
Damage Assessment ◽  
Technical Condition ◽  
Classification Methods ◽  
Damage Classification ◽  
Reliable Assessment ◽  
Sewer Rehabilitation ◽  
Underground Infrastructure ◽  
Original Part ◽  
Near Future

Technologies for the trenchless rehabilitation of pipelines using various types of coatings have been used for almost half a century. Considering that the assumed life expectancy of such renewed pipelines is 50 years, it will be necessary to assess their technical condition in the near future. The aim of this article is to attempt to answer the question "Do existing damage classification methods allow for the full and reliable assessment of the sewers already renewed with rehabilitation coatings?". The scope of the article, and its original part, is to describe how the problem of damage assessment of rehabilitation coatings has been included in various methods of classification of underground infrastructure pipelines, and conducting a comparison that compares these methods in terms of the damages described. An interpretation of the results of the research on rehabilitation coatings operated in various time periods, starting from those recently applied to those operating for over 30 years, was also made. The result of the analysis is to present the differences and deficiencies in the damage classification methods discussed.

Solar Upgrading of Fuels for Generation of Electricity

2001 ◽  
Vol 123 (2) ◽  
pp. 160-163 ◽  
Author(s):  
Rainer Tamme ◽  
Reiner Buck ◽  
Michael Epstein ◽  
Uriyel Fisher ◽  
Chemi Sugarmen
Keyword(s):  
Gas Turbines ◽  
Large Scale ◽  
Fossil Fuels ◽  
High Efficiency ◽  
Combined Cycle ◽  
Test Facility ◽  
Small Scale ◽  
Start Up ◽  
Efficiency Conversion ◽  
Solar Field

This paper presents a novel process comprising solar upgrading of hydrocarbons by steam reforming in solar specific receiver-reactors and utilizing the upgraded, hydrogen-rich fuel in high efficiency conversion systems, such as gas turbines or fuel cells. In comparison to conventionally heated processes about 30% of fuel can be saved with respect to the same specific output. Such processes can be used in small scale as a stand-alone system for off-grid markets as well as in large scale to be operated in connection with conventional combined-cycle plants. The complete reforming process will be demonstrated in the SOLASYS project, supported by the European Commission in the JOULE/THERMIE framework. The project has been started in June 1998. The SOLASYS plant is designed for 300 kWel output, it consists of the solar field, the solar reformer and a gas turbine, adjusted to operate with the reformed gas. The SOLASYS plant will be operated at the experimental solar test facility of the Weizmann Institute of Science in Israel. Start-up of the pilot plant is scheduled in April 2001. The midterm goal is to replace fossil fuels by renewable or non-conventional feedstock in order to increase the share of renewable energy and to establish processes with only minor or no CO2 emission. Examples might be upgrading of bio-gas from municipal solid waste as well as upgrading of weak gas resources.

V64.3A Gas Turbine Natural Gas Burner Development

2002 ◽  
Author(s):  
Heinrich Hermsmeyer ◽  
Bernd Prade ◽  
Uwe Gruschka ◽  
Udo Schmitz ◽  
Stefan Hoffmann ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Nox Emissions ◽  
Fuel System ◽  
Combustion System ◽  
Standard Design ◽  
Commercial Operation ◽  
Annular Combustor ◽  
Gas Burner ◽  
Development Approach ◽  
Near Future

From the very first beginning of the V64.3A development the HR3 burner was selected as standard design for this frame. The HR3 burner was originally developed for the Vx4.2 and Vx4.3 fleet featuring silo combustors in order to mitigate the risk of flashback and to improve the NOx-emissions (Prade, Streb, 1996). Due to its favourable performance characteristics in the Vx4.3 family the advanced HR3 burner was adapted to the Vx4.3A series with annular combustor (hybrid burner ring – HBR). This paper reports about the burner development for V64.3A gas turbines to reach NOx emissions below 25 ppmvd and CO emissions below 10 ppmvd. It is described how performance and NOx emissions have been optimised by implementation of fuel system and burner modifications. The development approach, emission results and commercial operation experiences as well are described. The modifications of the combustion system were successfully and reliably demonstrated on commercially running units. NOx emissions considerably below 25ppmvd were achieved at and above design baseload. An outlook to further steps of V64.3A burner development in the near future will be given in this paper.

Turbine Blade Tip Clearance Measurements in a Large Industrial Two-Shaft Gas Turbine

1982 ◽  
Author(s):  
J. Van Den Andel
Keyword(s):  
Gas Turbines ◽  
Electronic Control Unit ◽  
Control Unit ◽  
Tip Clearance ◽  
Start Up ◽  
Blade Tip ◽  
Inner Diameter ◽  
The Difference ◽  
Touch Probe ◽  
Blade Tip Clearance

In horizontally split gas turbines, distortions of the cylinders may be expected, especially during start-up conditions. This article describes how the distortions of an inner cylinder were first measured outside the turbine by placing it on a horizontal boring mill while heating the inner diameter. Modifications were made to reduce the distortion and the difference is shown. The cylinder was then tested in the actual turbine (CW352) where the diameter was compared with the presumably perfect circle described by the passing blades. Three monitors were used to determine the gap between the blades and the seal plates which are a part of the inner cylinder. Described is how a high accuracy is obtained using complex touch probe actuators and an electronic control unit which computes the blade-to-seal-plate gap and displays it for read out. A computer interface allows the information to be stored in the master computer for recall.

Remote Condition Monitoring of a Peaking Gas Turbine

1991 ◽  
Author(s):  
Ralph E. Harris ◽  
Harold R. Simmons ◽  
Anthony J. Smalley ◽  
Richard M. Baldwin ◽  
George Quentin
Keyword(s):  
Gas Turbine ◽  
Condition Monitoring ◽  
Gas Turbines ◽  
Vibration Amplitude ◽  
Thermal Stabilization ◽  
Cost Effective ◽  
System Structure ◽  
Start Up ◽  
Data Content ◽  
Software And Hardware

This paper illustrates how software and hardware for telecommunications and data acquisition enable cost-effective monitoring of peaking gas turbines using personal computers. It describes the design and evaluation of a system which transmits data from each start-up and shutdown over 1,500 miles to a monitoring computer. It presents system structure, interfaces, data content, and management. The system captures transient sequences of acceleration, synchronization, loading, thermal stabilization, steady operation, shutdown and cooldown; it yields coherent sets of speed, load, temperature, journal eccentricity, vibration amplitude, and phase at intervals appropriately spaced in time and speed. The data may be used to characterize and identify operational problems.

Development of Methanol Reformer for the Portable PEFC Power System by ITRI

2004 ◽  
Author(s):  
C. H. Lee ◽  
C. H. Huang ◽  
C. T. Lin ◽  
Y. C. Liu ◽  
Hsin-Sen Chu
Keyword(s):  
Steam Reforming ◽  
Maximum Flow ◽  
Water Gas Shift ◽  
Oxidation Reactions ◽  
Co Preferential Oxidation ◽  
Start Up ◽  
Startup Time ◽  
Water Gas ◽  
Near Future ◽  
Temperature Water

In order to apply the PEFC power generation system in near future, ITRI is cooperating with Taiwanese local electrical company to develop a compact methanol reformer. This methanol reformer can simultaneously catalyze autothermal and steam reforming reactions, depending on the application. Except the catalyst for methanol steam reforming and low temperature water gas shift reactions, ITRI has developed several catalysts for autothermal reforming, high temperature water-gas shift, and CO preferential oxidation reactions. We have integrated these catalysts to assemble a methanol reformer prototype. The characteristics of this methanol reformer operated at steady state are the maximum flow rate of hydrogen being 39 L/min (corresponding to 2.4 kWe), H2 concentration being 45∼65%, CO concentration less than 50 ppm, and the cold startup time less than 35 minutes. In addition, we have been developing a catalyst for methanation reaction. We hope to shorten the start-up time to less than 20 minutes and the volume of the reformer being reduced in half by integrating a good methanation catalyst into my next generation methanol reformer.

Danish Navy Experience With the KV-72 LM2500 CODOG Propulsion Plant

1983 ◽  
Author(s):  
Bent Hansen ◽  
Sloth Larsen ◽  
John W. Tenhundfeld
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Turbine Engines ◽  
Operational Experience ◽  
Gas Turbine Engines ◽  
Joint Effort ◽  
General Electric Company ◽  
Electric Company ◽  
Start Up ◽  
Selection Of

For more than twenty years the Royal Danish Navy (RDN) has been using gas turbine engines for propulsion of fast patrol vessels as well as frigates. This paper, which is the result of a joint effort by the Royal Danish Navy, Aalborg Vaerft Shipyard, and General Electric Company USA, describes how the propulsion system design was developed using previous RDN gas turbine system experience. A detailed description of the ship, the selection of machinery, and design of the propulsion configuration, including the LM2500 gas turbine module, is included. The three Royal Danish “KV-72” corvettes of the NIELS JUEL class have now been in operation for almost three years. Since the start-up of the NIELS JUEL machinery in November 1978 the CODOG propulsion plants aboard this class have accumulated more than 8,000 running hours, of which over 1,500 hours have been in the gas turbine or “sprint” drive mode. Operational experience with the GE LM2500 gas turbines is also described.

Sign in / Sign up

Export Citation Format

Share Document