Performance Enhancement of VAWT using Diffuser for Energy Extraction from Cooling Tower Exhaust Air

MATEC Web of Conferences Pub Date : 2023-01-01 DOI:10.1051/matecconf/202337701022

E. Singh, Sukanta Roy, Y. San, Law Ming Chiat

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Abstract

Renewable energy generation need to be accelerated to battle climate change and depletion of fossil fuel resources. Innovation to design wind recovery system which are efficient is vital to contribute green energy production. Many advancements in vertical axis wind turbines (VAWT) were made over the years however, it is still not as efficient as conventional turbines, and some countries does not have the luxury of strong consistent wind throughout the year. Therefore, this study focuses on extracting wind energy from unnatural sources, specifically for cooling tower exhaust air energy recovery. In this study, cycloidal diffuser with different shroud lengths was used to study the performance of a 3-bladed H-Darrieus VAWT (HDWT) with S-1046 airfoils under accelerated wind conditions in a 3-dimensional numerical study using shear stress transport k-ω turbulence model. The cycloidal diffuser with shroud length of 0.48D increased the HDWT power coefficient by 26.66% compared to the bare HDWT at tip speed ratio of 2.0. Aerodynamics around the energy extractor system was also discussed and this investigation has provided good understanding of the flow behaviour of the wind augmented HDWT under cooling tower exhaust air.

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利用扩散器从冷却塔排风中提取能量提高VAWT的性能

可再生能源的生产需要加快，以应对气候变化和化石燃料资源的枯竭。创新设计高效的风回收系统是促进绿色能源生产的关键。多年来，垂直轴风力涡轮机(VAWT)取得了许多进步，然而，它仍然不如传统涡轮机效率高，而且一些国家没有全年强劲持续的风。因此，本研究的重点是从非自然资源中提取风能，特别是冷却塔排风能量的回收。本文采用不同叶冠长度的摆线扩散器，采用剪切应力传递k-ω湍流模型，对S-1046型三叶片H-Darrieus VAWT (HDWT)在加速风条件下的性能进行了三维数值研究。当叶尖速比为2.0时，叶冠长度为0.48D的摆线扩压器使HDWT功率系数比裸HDWT提高26.66%。围绕能量提取系统的空气动力学也进行了讨论，这项研究提供了很好的理解风增强HDWT在冷却塔排气下的流动行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

MATEC Web of Conferences

自引率

0.00%

发文量

342

审稿时长

6 weeks

期刊介绍： MATEC Web of Conferences is an Open Access publication series dedicated to archiving conference proceedings dealing with all fundamental and applied research aspects related to Materials science, Engineering and Chemistry. All engineering disciplines are covered by the aims and scope of the journal: civil, naval, mechanical, chemical, and electrical engineering as well as nanotechnology and metrology. The journal concerns also all materials in regard to their physical-chemical characterization, implementation, resistance in their environment… Other subdisciples of chemistry, such as analytical chemistry, petrochemistry, organic chemistry…, and even pharmacology, are also welcome. MATEC Web of Conferences offers a wide range of services from the organization of the submission of conference proceedings to the worldwide dissemination of the conference papers. It provides an efficient archiving solution, ensuring maximum exposure and wide indexing of scientific conference proceedings. Proceedings are published under the scientific responsibility of the conference editors.