Abstracts - VGB PowerTech Journal 6/2006

Challenge Quality

Farwick, Hermann; Ritterbach, Eckhard; Then, Oliver; Seibel, Gerhard; Bodmer, Thomas; Altmann, Hubertus; Benesch, Wolfgang A.

For power plant operators and future investors the issue of quality did not improve despite all formal and practical endeavours, partly, the situation has become even worse. Quality defects are still an increasing problem for suppliers and operators alike. The known general conditions of the energy economy, like demand in new constructions and market situation as well as the modified legal conditions and technical regulations urgently require that the expectations of power plant operators on the topic of quality as joint problem are laid down.

Current Development on the Electricity and CO2 Market

Lerch, Felix

The liberalisation of the German energy market substantially changed the basic requirements of power plant operators. An efficient wholesale market has developed, which is also for power plant operators a benchmark for the evaluation of the price for self-produced electricity. The article presents the basics of electricity wholesaling, several wholesale products and markets. Current electricity prices are calculated for a representative base load and peak load power plant.

Is Systematic Training of Power Plant Personnel Still Up-to Date?

Baumgarten, Michael

Is systematic training of power plant personnel still up-to date? This question is targeting on education and advanced training of maintenance personnel in power plants. The few staff members who have to deal with planning, organisation and realisation of maintenance measures have to meet a number of requirements. Such qualification has to be as effective as possible by taking into account operational necessities. For a number of years VGB Kraftwerksschule has been offering training courses for maintenance supervisor in power plants.

State of Material Development for New Power Plants – Possibilities for their Utilisation and Retrofit to Existing Plants

Hahn, Bernd; Bendick, Walter

The construction of new power plants with higher steam parameters is also challenging for materials technology. The paper will present the current knowledge on materials´ behaviour and the application limits of 9 % steels that resulted from the evaluation of long-term strength values. Besides, a report will be given on the state of development of a 12 % steel and its application possibilities.

Precise Assembly and Condition-related Maintenance of Bolted Joint Connections by Means of PMTS

Scheuch, Frank; Kociorski, Reinhold; Meisterling, Jesse; Baker, Ron

Bolts have to be tightened accurately to the calculated minimum clamp load to guarantee the safety of critical bolted joints. They will then withstand the known operational loads. Under real assembly conditions the friction scattering under the head and in the screw threads normally exhibit considerable fluctuations, such that the common tightening methods cannot guarantee achieving an accurate minimum clamp load. The PMTS (Permanent Mounted Transducer System) technology offers the possibility of a fast and simple checking of the clamp load of a bolted joint at any time during and after assembly. The integration of PMTS in condition monitoring systems enables the entire condition-based maintenance of bolted connections. (EN)

Mitigation of Measuring Faults by Sulphuric Acid Aerosols for the Determination of Low-range Mass Concentrations of Dust in Dry and Wet Flue Gas

Dieckmann, Hans-Joachim; Ulatowski, Ulrich; Knieschke, Andreas

In connection with the amendment of the 13th and 17th BImschV (German ordinances for large combustion plants and for incineration and co-incineration of waste), the limit value for dust emission concentration was decreased from 50 mg/m3 to 20 mg/m3.
The VGB research project no. 255 was to demonstrate by which dust measuring procedure an elimination of the sulphuric acid aerosols should be possible in clean flue gases, which are loaded with sulphuric acid aerosols, in order to ensure a correct calibration of dust emission measuring devices.

Reduction of SO₂ Emissions in the Combustion of High-alkali Biofuels

Müller, Michael; Hilpert, Klaus

The paper outlines the results of the EU project “HIAL – Biofuels for CHP plants – Reduced Emissions and Cost Reduction in the Combustion of High-alkali Biofuels”. The main objective of the project was the development of low-cost primary measures for achieving a SO2 emission below the EU emission limit of 200 mg/Nm3 without the need for the installation of a flue gas desulphurisation unit. The experimental work was complemented by numerical simulation of the combustion chemistry. The full-scale tests confirm the results of the laboratory investigations. (EN)

Quality Control for Co-combustion of Refuse-based Fuels in the Jänschwalde Power Plant

Hörtinger, Thomas; Menge, Frank; Kohde, Hans-Michael; Ringel, Jens; Piekos, Siglinde

In 2005, two plants for co-combustion of substitute fuels went into continuous operation at the Jänschwalde site of Vattenfall Europe Generation AG & Co. KG (VE-G). Concepts for the receipt, conveyance, proportioning and quality control of refuse-based fuels (RBF) have been developed since 1999. Practical quality control from the waste legislation preliminary control up to documentation of input control according to the law on waste are explained. The report introduces analyses and conclusions of a two-years test operation and the previous continuous operation.

Experiences with Internal Cleaning of Components of Water-steam Cycles

Butter, Leo M.; van Deelen-Bremer, H. Marga

Many processes have been applied by the chemical cleaning companies to remove the internal oxide layer from the tubes of a power plant's steam generator. Unfortunately performance and results are not always as desired. In this paper some important aspects of the cleaning are highlighted and explained along with the experiences of KEMA. (EN

The Paperless Power Plant

Sturm, Franz Adolf; Georg, Erich

The full-scope transition from paper-based work processes to work processes essentially conducted using information technology (IT) for the management, operation, monitoring and maintenance of power plants brings a whole series of benefits. The economic benefits have in each case to be quantified for the concrete circumstances and expenditures of a particular power plant. The transition is a far-reaching change process for the entire power plant and can be achieved with a step-by-step concept.

Implementation of the Operational Safety Ordinance as Demonstrated by RWE Power AG

Uhlig, Eberhard; Gröner, Harald

The law governing plant and operational safety in Germany was fundamentally reformed as the Operational Safety Ordinance entered into force in autumn 2002. The salient points of this reform with its associated consequences are explained in the paper and the practical implementation at RWE Power AG is described.

Copyright for Print Media and Internet – Practical Advises for Daily Use

Nicole Denise Rademacher

Publications in print media or in the Internet may be protected works according to the copyright act. Nevertheless, the author is entitled to agree to any use of his work by third parties, both against payment or for free. There is a legal fiction in favour of an exclusive right of usage, if the author sends a text to the publishing house without any further comment in order to have it published in a periodically issued magazine. In the event that a photo is taken from a copy of a text written by hand or this copy is scanned, this action violates the copyright of the author.