A Comparative Computational Fluid Dynamics Study on an Innovative Exhaust Air Energy Recovery Wind Turbine Generator

作者：Tabatabaeikia Seyedsaeed; Bin Nik Ghazali Nik Nazri^*; Chong Wen Tong; Shahizare Behzad; Fazlizan Ahmad; Esmaeilzadeh Alireza; Izadyar Nima

来源：Energies, 2016, 9(5): 346.

DOI：10.3390/en9050346

• vertical axis wind turbine
• guide vane
• computational fluid dynamics (CFD)
• turbulence model
• exhaust air recovery systems
• building integrated

Recovering energy from exhaust air systems of building cooling towers is an innovative idea. A specific wind turbine generator was designed in order to achieve this goal. This device consists of two Giromill vertical axis wind turbines (VAWT) combined with four guide vanes and two diffuser plates. It was clear from previous literatures that no comprehensive flow behavior study had been carried out on this innovative device. Therefore, the working principle of this design was simulated using the Analysis System (ANSYS) Fluent computational fluid dynamics (CFD) package and the results were compared to experimental ones. It was perceived from the results that by introducing the diffusers and then the guide vanes, the overall power output of the wind turbine was improved by approximately 5% and 34%, respectively, compared to using VAWT alone. In the case of the diffusers, the optimum angle was found to be 7 degrees, while for guide vanes A and B, it was 70 degrees and 60 degrees respectively. These results were in good agreement with experimental results obtained in the previous experimental study. Overall, it can be concluded that exhaust air recovery turbines are a promising form of green technology.

• 出版日期2016-5