Reference Power station turbines

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    Power station turbines/acoustic pillows
    BBM Akustik Technologie, Planegg
    RÖHRING-BBM, Coswig



exPANsIoN joINTs


Gas turbines/acoustic pillows
Frenzelit acoustic pillows in gas turbines:

Tricky mission
environmental protection is more than climate protection. Acous-
tic pollution is among the most pressing environmental problems
– all over the world and to an increasing extent. one conceivable
solution to the problem is ear protection. A more efficient way to
solve the problem is to tackle it at the noise source. In the flue gas
chimneys of gas turbines, for example, through which hot gases
escape at a high temperature – and at a noise level that neither
company staff nor neighbours can be expected to accept unless
soundproofing measures are taken.
                                                                          Opts for Frenzelit: BBM Akustik Technologie, Planegg near Munich.

                                                                          reach peak levels of up to 700°C. Not to mention the higher me-
                                                                          chanical stress caused by shorter intervals between load changes
                                                                          and the strain associated with this as a result of deployment in
                                                                          peak load power stations with daily starts and stops. Such as for
                                                                          example a new gas turbine power station in Tarragona/Spain that
                                                                          needed to be re-equipped.

More than 1 million m2 from Frenzelit processed in two years: RÖHRING-
BBM in Coswig near Dresden.

Increasingly exacting requirements

The only difficulty is that gas turbines are not just particularly loud
but also particularly difficult to soundproof. Especially in view of
the fact that the requirements are becoming increasingly exact-
ing. Whereas flue gas temperatures up to a maximum of 550°C
were state of the art for a long time, it is perfectly possible for the
gas temperatures in the latest generation of power stations to            Perfect fit: Frenzelit acoustic pillows in the silencer cavities.
Partnership between Frenzelit and BBM Akustik

It is standard practice to use stainless steel structures for acoustic
insulation, with either loose insulation material or precisely fabri-
cated acoustic pillows fitted in them. These pillows have the advan-
tage that they are easy to handle and can be in installed within five
minutes, whereas loose material takes considerably longer to fit –
without guaranteeing such consistent material/density distribution.

                                                                         Customised manual operations: fitting the BBM-compound.

                                                                         Patented worldwide

                                                                         Reiner Schrei, Senior Executive and head of the Frenzelit technical
                                                                         textiles division, and Rita Jeske-Booth, Key account manager in
                                                                         the same division, developed an alternative that reaches comple-
                                                                         tely new dimensions where its efficiency level is concerned: the
                                                                         search made was for improved absorber materials which are sui-
                                                                         table for operating temperatures in the ranges up to 650°C and
                                                                         700°C. What was developed were acoustic pillow fillings made
Acoustic insulation of a flue gas chimney: the silencer structure.       from isoGLAS®GT glass fibre and the highly temperature-resistant
                                                                         fibre material isoTHERM®GTH. They have a number of improved
The engineering firm BBM Akustik Technologie GmbH (Planegg               properties:
near Munich in Germany) has made a name for itself around the            • Longer fibres (compared with such standard insulation material
world with the design and supply of silencers for large plants. The         as basalt)
subsidiary RÖHRING-BBM (Coswig near Dresden), the leading                • Consistently homogeneous filling material density over its
German manufacturer of industrial silencers has specialised in              entire life span
such steel engineering applications as the construction of power         • Greater fibre stability to cope with extreme thermal and me-
station silencers, inline, reactive and blow-off silencers for plants       chanical stresses
all over the world. Hagen Peters, engineer in BBM Akustik Techno-        • Absolutely safe as far as respirability is concerned.
logie and project manager responsible for research and develop-
ment, initiated investigations with the objective of increasing          The highly temperature-resistant acoustic woven fabric AF 460 HT
the quality of standard pillow designs. A search for solutions was       red for pillow envelopes that was also developed for these special
made with the market leader for technical textiles, Frenzelit-Werke      applications guarantees higher tear and brittle fracture resist-
GmbH & Co. KG (Bad Berneck) – with successful results.                   ance properties.

                                                                          Do you have any questions about your application?
                                                                                                               Phone: +49 9273 72-0
                                                                          Customised just in time

                                                                          Series production of second-generation acoustic pillows – acoustic
                                                                          pillows with glass fibre filling and BBM-compound from Frenzelit
                                                                          isoTECH® material – began in Bad Berneck on the basis of this
                                                                          confirmation in practical testing. In line with the very varied tur-
                                                                          bine geometries, which make it necessary to produce pillows with
                                                                          up to 25 different dimensions in some cases – including conical
                                                                          and triangular configurations – the pillows are manufactured in
                                                                          precision operations in Bad Berneck in accordance with specifica-
                                                                          tion drawings. Production of the silencers starts in Coswig at the
Planning partners: (from left to right) Thomas Reuß (RÖHRING-BBM), Rita   same time. The pillows are supplied just in time, as arranged with
Jeske-Booth (Frenzelit), Hagen Peters (BBM Akustik).
                                                                          the Coswig plant manager Thomas Reuß. The special identifica-
                                                                          tion system facilitates assignment of the appropriate pillows to
In addition to this, BBM-Compound from Frenzelit isoTECH® was             the silencer cavities tremendously.
developed - a composite material made from Frenzelit isoTECH®
needlemat and Frenzelit AM 30 glass needlemat. – This new ma-
terial is acoustically transparent but provides at the same time
a highly effective mechanical protection between the absorber
pillows and the perforated plate. Global patent applications have
been filed for this new solution.

Acoustic pillows

Installation in Tarragona                                                 Quality assurance system: final inspection of the silencers.

An opportunity to test both types of acoustic pillow under extreme        Quiet turbines
conditions in practical operation, i.e. at temperatures of about
650°C, came up at a gas turbine power station in Spain. The               The results produced with this innovative technology have
results at the end of the trial were clear: the filling of the basalt     impressed not only the power station operators in Tarragona.
fibre pillows had lost its fibrous structure almost completely and        A number of other plant manufacturers also plan to use the new,
had turned into a powdery, rusty red mass. The glass fibre pillows        highly temperature-resistant material, which satisfies future
were practically unchanged.                                               requirements as well.
Frenzelit product range
     Gaskets and gasket materials
     Comprehensive know-how acquired over a period of many years and process engineering skills
     enable Frenzelit to set new standards in the production of modern sealing materials. Frenzelit
     supplies a complete range of gaskets, with novaphit®, the generation of gaskets made from pure
     graphite reinforced with expanded metal, the material concept novatec® - “engineered graphite
     with Kevlar® (a trademark registered by DuPont)”, the high-pressure gasket material novapress®,
     the PTFE gaskets novaflon® and the metal, dispenser and screen printing gaskets novaform®.

     Technical textiles
     Skills in the development and processing of highly temperature-resistant fibres combined with
     decades of experience have made Frenzelit one of the leading manufacturers of technical textiles.
     The range of sealing and insulating materials consists of various product lines such as isoGLAS®,
     isoTHERM®, novaTEX®, novaSEAL® and isoKERAM® with different temperature limits up to 1 200°C.

     expansion joints
     More than forty years of experience go into the production of our fabric and elastomer expansion
     joints for power engineering and plant manufacturing applications. Due to the extremely exac-
     ting demands made in operation, exclusive use is made of highest-quality special woven fabrics
     produced in-house from glass, SiO2-glass or aramid fibres as well as the necessary coatings. PTFE
     composite material and PTFE, rubber and steel expansion joints round off the product range.

     The insulation range includes not only heat insulation materials such as woven fabrics, woven
     tapes and nonwoven fabrics from the isoGLAS® and isoTHERM® product lines but also isoplan® in-
     sulation panels and special materials for transport rollers used in high-temperature applications,
     novaplan® heat shielding materials and cushioning materials for acoustic insulation.

     New materials
     Frenzelit develops and produces a range of high-performance nonwoven materials under the
     name HICOTEC®. These materials are based on use of such high-performance fibres as carbon
     fibres. They have different properties from both technical textiles and high-performance papers.
     They are “new materials” for new application areas.
                 Technical textiles for
                 BBM Akustik

                 Seen but not heard: acoustic silencers in a gas turbine chimney.

linien raus    Yes, we are interested in technical textiles.
                    Please send us the following, with no
                    commitment for us:

                   Detailed information material

                   Please arrange an appointment with us.

               Surname, first name



               Postcode, town/city
                                                                           Frenzelit-Werke GmbH & Co. KG
               Country                                                     P.O.Box 11 40
                                                                           95456 Bad Berneck
Frenzelit: “creating hightech solutions”
Innovations today for the world tomorrow

Frenzelit-Werke GmbH & Co. KG develops, produces and sells
high-pressure gaskets, technical textiles for insulation, sealing and
filtration as well as expansion joints for plant engineering. About
400 employees work at the production facilities in Frankenhammer
and Himmelkron in Germany. Subsidiaries and sales offices in the
USA, Russia, the Czech Republic, China and India are impressive
evidence of the global presence that the medium-sized company
from Upper Franconia in Southern Germany has established. The
managing partner is Dr Wolfgang Wagner. Frenzelit was founded
in 1881. The company has ISO 14001 environmental management
certification; quality certification has been obtained by the
gaskets and technical textiles divisions (ISO/TS 16949:2002) and
the expansion joints division (ISO 9001:2000).

Direct comparison between basalt and glass: the glass fibres (on the right)
have maintained their structure after six months in practical operation.

Advantages at a glance:

Frenzelit acoustic pillows with glass fibre filling
• Longer life-time
• Higher temperature resistance (up to 700°C)
• Excellent acoustic insulation
• Dimensional stability throughout the life cycle
• Fibres > 6 µ are not respirable and are not subject to the WHO
  regulations (PSA not required)
solution partners

                               Thomas Reuß,
                               senior executive and plant manager
                               at RÖHRING-BBM GmbH (Coswig
                               near Dresden):                                                             Hagen Peters,
                               “The co-operation is completely                                            engineering graduate, senior execu-
                               smoothly. The acoustic pillows arrive                                      tive, project manager and Head of
                               from Bad Berneck just in time. The                                         R&D, BBM Akustik Technologie GmbH
                               numbering system enables them to                                           (Planegg near Munich):
                               be assigned clearly. And since the long
                               fibres do not involve any health risks                                     “Frenzelit acoustic pillows based on
                               at all, no occupational health and                                         glass fibres have the potential we need
                               safety measures of any kind needs to                                       to equip modern generation turbine
                               be taken.”                                                                 power stations.”

                                                                                                                                                    Subject to technical amendment.
                                                                                                      Rita jeske-Booth,
                          Reiner schrei,                                             has a Master‘s degree and is key
    engineering graduate, Head of the                                          account manager in the Frenzelit tech-
    Frenzelit technical textiles division                                        nical textiles division (Bad Berneck):
                         (Bad Berneck):
                                                                                      “The Tarragona project is a good
   “With its in-depth skills in the speciali-                                      example of what we can achieve in
  sed field of soundproofing products for                                       close co-operation with our customer,
 large industrial plants – as regards both                                      from customised innovation develop-
the steel structures and the engineering                                           ment to inhouse production of the
services from planning to measurement                                           complete package, needlemat, woven
     – BBM is one of our most important                                        fabric and compound and just-in-time
partners. And one of the most construc-                                             delivery – with everything coming
                             tive ones too.”                                       from a single, integrated supplier.”

Figures – data – facts
Wherever noise levels are considered to be too high and therefore have to be reduced,
RÖHRING-BBM has been manufacturing soundproofing products for industry for more than
25 years now – particularly in power station and plant engineering. The company‘s range
includes the production, delivery and installation of large silencers and acoustic enclosures.

All the products are planned, supplied and installed as special individual designs. Welding
engineers operate state-of-the-art thin and thick sheet metalworking machines in the
production operations. The technology and quality of the products are optimised on an
ongoing basis within the corporate group in close liaison with BBM Akustik Technologie.



                                                Frenzelit-Werke GmbH & Co. KG
exPANsIoN joINTs
                                                P.O.Box 11 40 • 95456 Bad Berneck • Germany
                                                Phone: +49 9273 72-0 • fax: +49 9273 72-222