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Gewählte Master / Diploma Thesis:

Carmen Villotti (2013): „Integration industrieller Abwärme in Wärmeverteilnetze“.
Master / Diploma Thesis - Institut für Verfahrens- und Energietechnik (IVET), BOKU-Universität für Bodenkultur, pp 101. UB BOKU obvsg

Data Source: ZID Abstracts
Industrial waste heat is a byproduct in the course of various processes and is often emitted unexploited into the environment or cooled off at a high price. In Austria alone, a technically usable waste heat potential of 15.230 GWh per year was ascertained. The external utilization of such potentials through integration of industrial waste heat into heat distribution networks is at the centre of this thesis. The fundamental question is, wheter the installed methods to ascertain general heat loss potentials qualify to capture externally usable waste heat. The utilization of existing waste heat potentials is crucially dependent on the economic efficiency of individual projects. Thus, it has to be examined which impact diverse parameters such as network return temperature, uncoupled thermal output and distance to the heat distribution network have on heat production costs. Within the scope of this thesis several distinctive potential studies were examined and analysed. Furthermore, the question to what extent they are usable for the elicitation of external waste heat potentials of an entire region was at the centre of investigation. In addition, a model was developed to visualize the integration of industrial waste heat into an existing local heat supply system. It was possible to assess the profitability of an uncoupling of industrial waste heat under dissimilar circumstances, on the basis of the “Levelized Costs of Heat” concept. In the course of this analysis it was revealed that reliable data of external waste heat potentials is generally recorded at plant level (bottom-up method). The high sensitivity of heat production costs in contrast to the distance between waste heat source and local heat supply system reinforces the significance of local factors of influence. In addition to the spatial distance also the network return temperature was identified as an essential influence. This underlines the relevance of most recent developments in the area of low temperature networks (anergy networks). In dependence of the input parameters the calculated heat production costs show significant fluctuations. However, in contrast to other renewable heat supply technologies the external use of industrial waste heat proves to be a competitive option.


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