Experimental Study On Pneumatic And Power Characteristic Of The Concentrated Wind Energy Turbine

By the theory of aerodynamic, the flow field characteristic in the wind power concentrated equipment of 600W CWET was analyzed. Two important reasons decide the performance of the equipment. One was the section area ratio of contracting pipe, centre cylinder and diffuser, the other was the size of contracting pipe angle and diffuser angle. In order to improve the performance, wind power concentrated equipment was rebuilt, which section turned into rotundity for once it was octagon. The pneumatic characteristic of the CWET was tested by pitot and digital pressure gauge before and after the equipment rebuilt. The inlet section of centre cylinder was test sectionâ… , and the section where impeller fixed was test sectionâ…¡. The test points distributed under logarithm and linear law, and divided into 4 annulus, 16 points. The result of experiment study indicates that flow speed ratio increase to 1.36 in test sectionâ… and 1.25 in test sectionâ…¡,and wind energy increase to 2.49 times and 1.95 times before the wind power concentrated equipment rebuilt. After the equipment rebuilt, the flow speed ratio increase to 1.40 in test sectionâ… and 1.30 in test sectionâ…¡,and wind power increase to 2.75 times and 2.20 times. The value of turbulence intensity in the four annulus of test sectionâ…¡(before the equipment rebuilt) decline 10.66%,10.38%,7.96% and 8.67%.The output power up to 600W while wind speed was 9.5m/s and 654.3W of 10m/s before the wind power concentrated equipment rebuilt. After the equipment rebuilt, 600W and 748.8W output achieved when the wind speed was 8.9m/s and 10.0m/s. The output power increase 14.4% for wind speed was 10.0m/s when the wind power concentrated equipment rebuilt.