D7 Evaluation of Austrian Efficiency Checks in Sawmills

Transcription

1 D7 Evaluation of Austrian Efficiency Checks in Sawmills Durchgeführt von Renè Reisenbichler Unterstützt durch ENERGON Energie- und Umweltmanagement GmbH sowie der Österreichischen Energieagentur Im Rahmen des Intelligent Energy Europe Projektes ENGINE Energy Efficiency in SMEs und von klima:aktiv der Klimaschutzinitiative des Lebensministeriums (Programm energieeffiziente betriebe ) sowie der regionalen Beratungsförderprogramme der Bundesländer

2 Evaluation of Energy Efficiency Checks in Austrian Sawmills Content of the work is to analyse the energy consumption of the inspected sawmills and to discover possible economies by calculating characteristics as well as the comparison with data from other assays. The analysed data has been collected by professional energy auditors. After collecting they filled the data in a software tool called protools, which calculates saving potentials. This protools together with the final consulting reports from each sawmill represents the data basis for this work. Because of a heterogeneously formed industry and the small inspection sample the result has no generally validation. Nevertheless it is interesting to know approximately how much energy can be saved in this branch. In every considered sawmill the highest saving potential were found at the heat-supply. It is necessary to know that the energy carrier for the heat supply is a co product and for this reason for free. Most of the companies are not interested to invest money in order to enhance energy-efficiency in this area, except it is possible for the companies to sell a part of the generated heat in form of teleheating or to sell parts of the co product in form of pellets. The main heat-consumer are the drying chambers, the room heating is negligible. Essential losses results from non-adjustable heating system and bad insulation. The average saving potential is about 25%. In the current-area it is much more interesting for the company to invest in enhancing energy-efficiency because saving electrical energy means saving money. Electrical drives cause the main part of electrical energy consumption. In every company exists non adjustable electrical drives with a wrong power dimension. Mainly at high performance drives idle running cause high energy consumption. The same case is valid for the ventilators and pumps. They often have a wrong power dimension combined with non adjustable speed. Altogether the status of electrical drives, ventilators and pumps is in good condition. The saving potential for electrical drives is about 7% and for ventilators only 4%. Due to pumps has a relatively small part of the total consumption of electrical energy in the inspected sawmills, they were not investigated with such accuracy like drives and ventilators. This is the reason why it was not possible to calculate a serious saving potential for this area. The highest saving potentials within the overall current area were found at the pneumatic system with 28%. Altogether about 8% of the total current consumption can be saved. Heat recovery systems can be found at high performance pneumatic systems and at drying chambers. Experienced data shows that there is a much higher level for heat recovery possible. Because of the mentioned reasons the extrapolation of the calculated saving potentials for the whole Austrian sawmill industry can be seen as rough benchmark. With a total energy consumption of approximately GWh, the average saving potentials at the heat-supply (25%) and the current area (8%), it should be possible to save about 421 GWh thermal energy and about 37 GWh electrical energy in this branch. All of the mentioned saving potentials can be achieved by applying the best available technologies. To achieve the best energy savings, it is necessary to combine technical and organizational arrangements. For an economical and sustainable use of energy in companies it is advantageous to implement energy management in the corporate structure. In this way it is feasible to ensure that only the best available technologies will be applied and also that the employees become motivated, trained and sensibilized in the use of energy.

3 The following Graph shows the staff members (red) and solid cubic meter (green) of the five pilot sawmills: The following table shows the average saving potentials of the pilot companies. The average saving potential for electricity consumption is 8% of the whole electricity consumption. 27.6% of it can be implemented in compressed air systems, 17.8% in lightning systems, 7% in electrical drivers, 6.7% in pumps and 4.4% in ventilation systems. The average total saving potential in heat area is 25%. 36.8% of it regards the heat consumption and 19.3% the heat production and distribution.

4 Following table shows different benchmarks of the five pilot companies in comparison to existing benchmarks from different sources. Following graph shows the total heat consumption of the five pilot companies:

5 Specific heat consumption per m³ dried wood: Specific electricity consumption in kwh/solid cubic meter:

6 Specific fuel consumption in kwh/ solid cubic meter: Share of energy costs of turnover (blue) and share of energy consumption of turnover (brown)

7 Share of electricity consumption for compressed air from the total electricity consumption: Total processed wood in solid cubic meters for Austria in 2008: 18 Mio. solid cubic meters. Calculated total energy consumption of the total sawmill sector: 2530 GWh.

8 Calculated saving potentials for total sawmill sector in Austria: 421 GWh thermal energy and 37 GWh electricity.

9 October 2007 March 2010 Supported by Legal Disclaimer The sole responsibility for the content of this publication lies with the authors. It does not necessarily reflect the opinion of the European Union. The European Commission is not responsible for any use that may be made of the information contained therein. Die alleinige Verantwortung für den Inhalt dieser Publikation liegt bei den Autoren. Sie gibt nicht unbedingt die Meinung der Europäischen Union wieder. Die Europäische Kommission übernimmt keine Verantwortung für jegliche Verwendung der darin enthaltenen Informationen. Il contenuto di questa pubblicazione è responsabilità degli autori e non rappresenta necessariamente l'opinione della Comunità Europea. La Commissione Europea non è responsabile per l uso che potrà essere fatto dei contenuti. Ansvaret för denna publikation och dess innehåll ligger hos författarna. Innehållet behöver inte överensstämma med åsikter och ställningstaganden av Europeiska Unionen. Europeiska Kommissionen tar inte ansvar för informationen i denna publikation eller dess användande.