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Institut für Wasser- und Umweltsystemmodellierung - IWS



"Design Parameter Optimization of a Textile Turbine - Hydraulic Experiments"

A need for inexpensive small-scale power production exists in developed nations due to the high energy production costs for large centralized plants and in developing nations where electricity may not at all be available. Wind, Solar, and Hydropower sources can aid in providing a continuous, decentralized, and ecologically-sound source of energy. The textile turbine is a new type of hydropower device which may aid in future power production.

This Independent Study provides further study of the textile turbine through hydraulic experimentation. It was carried out in furtherance of the work done by Hüseyin Eraydin in his March 2006 Master’s Thesis; “Investigation on a New Type of Turbine.” The primary goal of this work was to determine the optimal geometric configuration of the textile bags through laboratory experimentation.

First, a new experimental apparatus for measuring the drag force was created. Velocity profiles were then taken in the test flume for varying depth and discharge. Total drag force was then measured for stationary bags a wide variety of textile bag shapes and positions. The results indicated that multiple rectangular textile bags of the same dimensions positioned with edge-to-edge horizontal offset should provide the highest drag force. This was observed to occur almost irregardless of the longitudinal spacing. Experiments also indicated that the textile turbine gained a substantial amount of its energy from turbulent exchange. For this reason, the textile turbine’s total efficiency should be evaluated using a coefficient of performance. It is also recommended that further work be carried out with the bags in motion to assess a possible reduction in system performance.