... he pioneers of modern aerodynamics, and built his on ind tunnel for experiments. La Cour as concerned ith the storage of energy, and used the electricity from his ind turbines for electrolysis in order to produce hydrogen for the gas light in his school. One basic draback of this scheme as the fact that he had to replace the indos of several school buildings several times, as the hydrogen exploded due to small amounts of oxygen in the hydrogenTo of his test ind turbines in 1897 at Askov Folk High School, Askov, DenmarkCharles F. BrushCharles F. Brush 1849-1929 is one of the founders of the American electrical industry. He invented e.g. a very efficient DC dynamo used in the public electrical grid, the first commercial electrical arc light, and an efficient method for manufacturing lead-acid batteries. His company, Brush Electric in Cleveland, Ohio, as sold in 1889 and in 1892 it as merged ith Edison General Electric Company under the name General Electric Company GE.The Giant Brush indmill in Cleveland, Ohio During the inter of 1887-88 Brush built hat is today believed to be the first automatically operating ind turbine for electricity generation. It as a giant - the orlds largest - ith a rotor diameter of 17 m 50 ft. and 144 rotor blades made of cedar ood.. INCLUDEPICTURE http.indpoer.orgrt.gif t MERGEFORMATINET The turbine ran for 20 years and charged the batteries in the cellar of his mansion. INCLUDEPICTURE http.indpoer.orgrt.gif t MERGEFORMATINET Despite the size of the turbine, the generator as only a 12 k model. This is due to the fact that sloly rotating ind turbines of the American ind rose type do not have a particularly high average efficiency. Brush indmill is particularly noted for its fully automated electrical control system.Its principles using solenoids does not change very much ith future generations of ind turbines - until about 1980 hen the ind turbine controllers become equipped ith computers.1.2. The ind Energy Pioneers - 1940-1950The F.L. Smidth TurbinesDuring orld ar II the Danish engineering company F.L. Smidth built a number of to- and three-bladed ind turbines.Danish ind turbine manufacturers have actually made to-bladed ind turbines, although the so-called Danish concept is a three bladed machine. INCLUDEPICTURE http.indpoer.orgrt.gif t MERGEFORMATINET All of these machines like their predecessors generated DC direct currentThree-bladed F.L. Smidth machine from the island of Bog, built in 1942, looks more like a Danish machine, as part of a ind-diesel system hich ran the electricity supply on the island. This machine played an important role in the 1950s ind energy study programme in Denmark. In 1951 the DC generator as replaced ith a 35 k asynchronous AC alternating current generator, thus becoming the second ind turbine to generate ACThe Gedser ind TurbineThe innovative 200 k HYPERLINK http.indpoer.orgresgedser2.jpg tt sblank Gedser ind turbine as built in 1956-57 by J. Juul for the electricity company SEAS at Gedser coast in the Southern part of Denmark.The three-bladed upind turbine ith electromechanical yaing and an asynchronous generator as a pioneering design for modern ind turbines, although its rotor ith guy ires looks a bit old fashioned today.The turbine as stall controlled HYPERLINK http.indpoer.orgtourtrbpoerreg.htm , and J. Juul invented the emergency HYPERLINK http.indpoer.orgtourtrbsafety.htm tl anchor212271 aerodynamic tip brakes hich ere released by the centrifugal force in case of over speed. Basically the same system is used today on modern stall controlled turbines. INCLUDEPICTURE http.indpoer.orgrt.gif t MERGEFORMATINET The turbine, hich for many years as the orlds largest, as incredibly durable. It ran for 11 years ithout m ... Download