Each User made a presentation of their Plant's general configuration and main issues notified during operation and maintenance inspections with discussion after each presentation.  

Main technical issues were also listed in a break out session. A Quality Issues Database was established as part of GTUsers SGT800 Group web pages to follow up with all end users the topics raised. Topics will be discussed in the coming Webinars in 2022 and in the next in-person user conference in 2023.

Some of the technical highlights extracted from the user day:

• EOH and EOC intervals and basis of formulas used.
• Reliability of lube oil system.
• Lifetime of hot section components.
• Exhaust system configurations, expansion joints.
• Control system upgrades, reliability of critical signals.
• Flame detector issue.
• Load gear issues and alternative solutions.
• Lube oil varnishing.

Operation with LNG fuels and Liquid Fuel Oil

• Operation using LNG sources was discussed extensively and user's experience shared. Tuning, combustion pulsation issues and possible solutions.
• Dual fuel configuration and transfer limits from gas to oil and vice versa.

Vendor fair was running during the coffee breaks and during a dedicated time reserved for it. Specific Vendors were selected for the event providing services specifically for SGT800* gas turbine. Direct contacts to suppliers and component OEMs is important to get latest news on product upgrades and support during maintenance.

Real turbine parts like fuel nozzles, vanes, blades, inlet filters etc. were present at the Vendor fair. It was so different to see and touch real parts and discuss the manufacturing methods, cooling, coatings and performance of the parts. 

GE Power

GE session was great last week with the SGT-800* Users at Berlin. GE target was really to share our progress and show how the GE Power experience, expertise and technology are delivering on plant operation support, outage execution and the already running GE-developed parts in SGT-800* engines. GE brought their manufactured SGT800* parts to the conference, and it was especially rewarding to share details on how they are helping to increase Availability, Performance and, ultimately, reduce Cost of Electricity (while Users could see the GE Parts from up close).
 
We can already state with all humbleness that our GE solutions for SGT-800* do what we said they would do, based on factual data and more than 35,000 hours of operation. More focused than ever on continuing our journey in this space with the high flexibility, transparency and accountability that, we believe, is required.

Arnold Group
 

ARNOLD has been comparing traditional Insulation provided by the OEMs and compared it in terms of fitness, tightness, efficiency and maintainability with the ARNOLD Insulation system. The focus of the presentation was on explaining the advantages of a Single Layer Insulation system in terms of operation and maintenance as well as durability and cost efficiency. Most of the Units in the field are still using the original standard multilayer insulation with poor performance due to many removal and reinstalls which are causing ongoing degradation and related repair effort and cost.

The Solution ARNOLD provides will cut cost during maintenance and increase the performance during operation.

Minimax

Minimax fire detection and protection systems are installed in more than 500 Siemens Gas Turbines worldwide. Majority of these turbines are of type SGT800 and its predecessor model GTX100. Since these turbines are already in operation for years, Minimax talked about some very important aspects related to their systems.

Modernization/Upgrades:

• Minimax fire detection and control panel series FMZ4100 has been discontinued
• on 19/04/2013, Germany has implemented new EU directives (RoHS-II 2011) into national legislation as a result of which, as of 22/07/2017!, Minimax is no longer offering any spare parts to the market for control panel series FMZ4100
• Until 2020, the next possible solution was Minimax FMZ5000 fire control panels which is a successor model of FMZ4100
• In the second quarter of 2020, Minimax launched their “CLUNID FMZ6000” fire control panel. It is already successfully installed and operating trouble free at various sites in the world
• There are few detectors and signaling devices which are also discontinued and shall be replaced with their successor models

Spare Parts:
Minimax is highly recommending,

• to have a set of recommended spare parts at site, this will not only ensure minimum downtime of the turbines/systems in the event of malfunction or fire but, also help the service and maintenance activities at site
• that the end users take notice of the required exchange intervals of various detectors and devices.

All the relevant documentation, customer information letters and presentation are available for GTUsers end users to download from the Link to Minimax page on the GTUsers website.

DEKOMTE 

Dekomte manufactures fabric and metallic expansion joints and bellows, designed and constructed to compensate for changes in length due to shifting temperatures in duct work. Axial, lateral and angular movements are compensated for.

DEKOMTE expansion joints are available in any geometric shape (round, square, oval, multi-sided) and in any size.

Dekomte explained technologies, selection and criterias for proper expansion joint selection and maintenance:

• Expansion joints for SGT500, 600, 700 and 800 as OEM supplier.
• New design available for SGT800 with usage of standardized parts, less turbulence of the flow and easier installation.

FREUDENBERG 

New classification system simplifies filter selection
The revised ISO 29461-1 standard has recently come into force. It classifies air filters for the intake air filtration of turbomachinery.

Site- and plant-optimized solutions in intake air filtration offer operators of turbomachinery valuable potential for optimization in terms of performance, operational reliability and ease of maintenance. Up to now, the available test standards ISO 16890 (formerly also EN 779) and ISO 29463 / EN 1822 have only been of limited help when it comes to meaningful evaluation and needs-based selection of intake air filters for rotary machines such as gas turbines and compressors. The reason is that they were designed for filters used in general ventilation and airconditioning systems. This has changed when mid-September 2021 the Part 1 of the revised ISO 29461 has come into force. It specifies how the corresponding performance parameters of static air filters used in such systems are determined and classified. The 13 filter classes of the ISO 29461-1 standard create transparency, allowing filter performance to be objectively compared.

The volume flow rates and final pressure drops used to determine dustholding capacity have been adapted to the realities of turbomachinery. The new standard now also describes the procedure for determining the dust-holding capacity of EPA and HEPA filters, which was previously not covered by the ISO 29463 and EN 1822 standards. In addition, ISO 29461-1 for the first time provides concrete installation specifications for testing round filter elements, i.e. filter cartridges.

Classification according to T classes
The new filter classes start with T1 to T4 for coarse dust filters, while classes T5 to T9 cover fine dust filters. Classes T 10 to T12 refer to EPA filters and class T13 corresponds to a HEPA filter. In an online filter class configurator and in tables, Freudenberg Filtration Technologies clearly presents the new T classification for coalescer prefilters, pocket filters, cassette filters and filter cartridges. The filter class ratings according to the previously used standards are also listed here for easy comparison.

More information about the new standard is available at www.iso29461-1.com. As well as an explanatory video interview with Dr. Caesar, visitors can watch the online filter class configurator according to ISO 29461-1 and can download a detailed customer information with comparison tables. The industry specific e.FFECT brochure can be download here.

Faist

Faist is committed to supply premium Air Intake Filters providing the following benefits for SGT800 operators:

• More stable Dp and longer life for 1st stage pocket filters
• More stable Dp and longer life for pulse filters
• Complete flexibility for Vbank filters: 292mm deep, 440mm deep or 600mm deep. The deeper the filter, the more stable the Dp and the longer the life

Faist is Siemens’ approved OEM.