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Gewählte Master / Diploma Thesis:

Melanie Grammel (2006): Energiewirtschaftliche Untersuchungen in einer Brennerei.
Master / Diploma Thesis, BOKU-Universität für Bodenkultur, pp 73. UB BOKU obvsg

Data Source: ZID Abstracts
This diploma thesis analyzed the energy and mass balance in a distillery. The distillery had a daily capacity of 20.000 l Ethanol (absolute) during the observation period. The operating method is continuous and it is conceived to process different raw materials. The distillery delivered ethanol 96,4 % (v/v) from wheat and Distillers Dried Grains With Solubles (DDGS) with a dry matter of 95,9 %. The thermodynamical energy flow has been determined from the following units: rectification, decantation, preconcentration, concentration, condensation, drying and DDGS-cooling. The examinations showed, that the loss of energy is only for 10 % caused by heat radiation. The residual loss could be attributed by transfer losses. The examined units have already been constructed for a daily capacity of 30.000 l Ethanol (absolute). This circumstance is also the reason for the comparatively high energy demand of the ethanol production. To produce one kg Ethanol (absolute), 4,37 kg saturated steam and 1,02 kWh electric energy were necessary. For the DDGS production only 3,42 kg saturated steam and 0,13 kWh were necessary to produce one kg DDGS (with a dry matter of 100 %). These values lies between the literature values. Nevertheless the planned extension of a daily capacity of 30.000 l ethanol (absolute) could refine the energy efficiency. For the production of 100 l ethanol (absolute) 25,2 m³ natural gasoline and 352,6 kg saturated steam have been used. The starch efficiency lied about 49,8 % (w/w) and the raw material efficiency lied about 27,3 % (w/w). A tonne of wheat delivered 410 kg DDGS with a dry matter of 95,9 %. The production of a tonne DDGS (Starprot with a dry matter of 100 %) 3420 kg saturated steam and 252 m³ natural gasoline have been used.

Beurteilende(r): Braun Herbert

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