TÜV Rheinland Blog - Insights from Asia and Africa

Case Study: From conventional sources of energy to renewable biomass

Posted by TUV Rheinland on Jan 30, 2017 6:00:00 PM
TUV Rheinland
A heating plant in Tatabánya in Hungary has added three hot water boiler units fired by biomass to provide summer hot water service. Along with a new 20 MW wood chip-fired boiler, two existing units of 37 MW each were converted from gas to wood firing. By implementing renewable biomass fuel, the plant is expected to save nearly 60 million cubic meters of gas.

TÜV Rheinland InterCert Ltd was appointed to perform the PED NoBo supervision for one boiler and TPI technical supervision of the reconstruction of two other boilers.

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Inspection and NoBo (1008) activity

Our colleague Zoltán Erdélyi, performed a PED NoBo activity that started with verification and approval of the design submitted one of the plant boilers. Ferenc Gémes conducted inspection and acceptance testing of the boiler pressure parts. TÜV Rheinland experts successfully performed the on-site NoBo control, which included supervision, structural inspections and final acceptance procedure.

Third party inspection for welding technologies

During the reconstruction of two specific boilers our experts were able to provide the client a wide range of services. TÜV Rheinland InterCert examined and approved design documentation for both boilers. In addition, boiler parts for unit 4 were inspected at the manufacturing facility.

The biggest challenge of this project was the supervision of site assembling works. Several issues occurred when welding new and used boiler parts, such as differences of connected wall thickness, the visible inside-outside cleanness of older parts and welding materials after more than 20 years of use to new raw materials.

During TPI, our experts István Keresztesi and Ferenc Gémes not only verified the adequacy of weld joints, assembling works and manufacturing/assembling documentation, but also solved welding technologies issues. Performing hydro pressure tests of boilers successfully completed our TPI activity.

For more information on our third party inspection services and NoBo activites, please visit our website or contact us to speak to one of our experts.

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Topics: energy, energy efficiency