SIPA POWERTECH

Operation and Maintenance Energy Technology

Solutions for Cost Effective and Flexible Gas-Fired Power Plants

SIPA POWERTECH

SENTRO-SIPA

SENTRO - SIPA supports Power Plants in maintenance and operation for steam turbines, gas turbines

and generators since 5 years.

We convince with our high technical standard in connection with flexible and fast solutions provide to our

customers.

The special know how combines the full service capabilities, which makes a readily available pool of

expertise accessible.

We are executing our jobs every time with experienced personnel developed by Siemens (for eg.

Head of Siemens Service Harry Ossowski; generator commissioning engineer Hans Diebäcker,

commissioning ST Thomas Siwczak, supervisor ST Rudi Deimling, supervisor Generator Helmut Best,

Bump test Dr. Lutz Intichar, GT commissioning Willi Paschmann, etc.)

Our target is to achieve in any time measurable results with our performances

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SIPA POWERTECH

SENTRO - SIPA has more than 1.000.000 MW experience

Global network of local offices and workshops

We occupy around 350 experienced people worldwide

Our service activities mainly include:

• Fabrication and Re-engineering of turbine and generator components

• Major Overhauls on Turbine and Generator with own supervisor and

tooling

• Mobile On Site Machining Services

A small abstract of our references:

• Alstom Power

• Ansaldo

• Siemens AG

• ABB

• AEG

Istanbul (Türkei)

Duisburg (Germany)

• General Electric

• Power Machines Russia

• Voith Turbo GmbH & Co KG

• MAN

• LMZ

Profile

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SIPA POWERTECH

Our Quality Demand

On behalf of our customers, the quality standards of our work are extremely demanding on which we

keep aligning our actions to provide every day:

• Perfect customer focus

• Custom-made performances for the needs and preferences of our customers

• Usage of aggregated experiences and synergies

• Continuous improvement of the production and project management

If you have any questions, please feel free to contact our Office Manager Mrs. Sarit Gattenyo:

E-Mail: sarag@sentro-tech.com

ISO 14001:2004 ISO 9001:2008

Quality Standard

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SIPA POWERTECH

Product Groups

EPC of power plants

Operation of Plants

LTSA for main components

Outage Planning

Erection improvement

Project Management

Expediting

Service Programs

Modernisation

Operation &

Maintenance

Erection Planning

Troubleshooting

Measurement (e.g. vibration)

Commissioning

Training, Education

CFD, FEM Analysis

Due Diligence

Asset Management

Re- Location of power plants

Feasibility Study

Scope of Work

Project Management

Expediting

Load and Efficiency upgrades

STEAM GENERATORS

ENERGY from WASTE PLANTS

CCPP (future potential)

Competence for conventional and nuclear

Power Plants

• Boiler

• Gas- and Steam turbine

•Generator

• Balance of Plant

• Auxiliary Systems

• I&C System

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SIPA POWERTECH

Performance scope for CCPP

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*

*Individual packages are possible in spite of the presence of an OEM service contract

Full

Service

SIPA POWERTECH

Gas Turbine

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Gas turbine Capability

Minor inspections

Hot Gas Path Inspections

Major overhauls

Refurbishment

Re-engineering hot gas parts

Load and Efficiency upgrade

Commissioning

Delivery of spare parts

Gas turbine Types for full service

Siemens: SGT 600, SGT 5-1000

SGT 5-2000E, SGT 5-4000F

GE: Frame 6B, Frame 9E

SIPA POWERTECH

Gas Turbine

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Burner washing with flow

measurement

On-site cleaning solutions for GT parts

SIPA POWERTECH

Gas Turbine Parts

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SIPA POWERTECH

Gas Turbine Efficiency Improvements

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Major Overhaul at a SGT5 4000F Gas

Turbine

Result:

• Load increase of 18,4 MW

• Efficiency increase of 0,6%

This extraordinary performance and efficiency

increasing was a result of advanced Gas Turbine

Maintenance knowledge of SENTRO-SIPA.

SIPA POWERTECH

Gas Turbine Re-engineering

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Geometry of the cooling configuration inside

the blade leading edge

1st blade has complex internal structure and film

cooling:

serpentine-shaped cooling channels equipped with

large number of turbulators (ribs)

Trailing edge chamber with pin-fins and cut-back exit

slots

Leading edge showerhead cooling

Special-shaped holes on blade surface

Single crystal base material#

TBC coating

All geometry patterns (external & internal) have to be

collected by high-precision scanning systems in all

details.

SIPA POWERTECH

Steam Turbine

Turbine Capability

Minor inspections

Major overhauls

Re-blading (during an outage)

Repair of turbine valves

Modernisation of hydraulic control

systems

Delivery of spare parts

Insulation

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SIPA POWERTECH

Steam Turbine

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SIPA POWERTECH

Steam Turbine

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SIPA POWERTECH

Steam Turbine

Our target is to reach measurable result for our client

FE Analysis of a crack in HP inner-casing

Defect:

Crack 20mm deep at 180°

FEM Result:

Analysis shows that a singular event was

the reason for the crack (cold steam on

hot casing)

Casing can remain in operation

Monitoring of temperature difference

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SIPA POWERTECH

Generator

Generator Capability

Minor inspections

Major overhauls

Rewinding on site

Repair on windings on site

Bump test

Electrical tests

Major overhaul H2 and seal oil system

Delivery of spare parts

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SIPA POWERTECH

Generator

Situation

The H2-shaft sealing is complex and fault-prone

During the manufacturing process of steel/ white alloy

seal rings has many time lacks of babbit fusion

A lot of parameter influence the life time of seal rings like

seal oil pressure, mass flow, vibration etc.

A fault of the seal ring reduce the availabilty of the plant

and reduce the profit

H2-shaft sealing - is there any improvement possible?

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SIPA POWERTECH

Generator

Solution

H2-shaft sealing without white alloy

H2-shaft sealing only with bronze

No design changes necessary

No lacks of babbit fusion any more

A very good emergency run down character

Reduction of seal oil mass flow inlet by 30%

Reduction of seal oil H2 side by 15%

Increase of availabilty of the plant

Experience in a 3000 rpm nuclear power plant existing

H2-shaft sealing - is there any improvement possible?

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SIPA POWERTECH

Engineering

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Service lifetime assessment of planetary gears

CAD Model Data for load spectra

FE analysis of gear teeth Typical S-N diagram

Cycles to Failure

Str

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Lifetime prediction

Failure Analysis

Reliability Analysis

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SIPA POWERTECH

Special Tooling

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SIPA POWERTECH

On Site Machining

Specialists for On Site Machining

• Grinding

• Machining

• Rotor works

• Casing machining

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SIPA POWERTECH

SENTRO Technologies USA, LLC 2372 Morse Ave, Suite 200

Irvine, California 92614, USA

Tel.: +1-888-239-3132

eMail: info@sentro-tech.com www.sentro-tech.com

Contact Details

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