Performance gain of a horizontal axis hydrokinetic turbine using shroud
Performance gain of a horizontal axis hydrokinetic turbine using shroud
复制标题
使用护罩的水平轴水力涡轮机的性能增益
作者：
M. Shahsavarifard;E. Bibeau;A. H. Birjandi
可再生能源是常用的污染环境和减少化石燃料的替代品。水流的动能是一种高度需求的可再生能源，水平轴水力涡轮机是用于提取这种能量的各种设备之一。然而，该技术的低功率密度是其商业化的重要障碍。虽然用于提取水流的可用动能的分析贝茨极限为0.59，但0.45的实际功率系数看起来是理想的。虽然不能克服贝茨极限，但在转子周围放置护罩可以增加CP。本文介绍了在两种不同的涡轮上进行的实验工作的结果，以研究使用涡轮的水平轴流体动力涡轮机的增益。
Renewable energy is the alternative to commonly used environment polluting and declining fossil fuels. Kinetic energy of water currents is a highly demanded source of renewable energy and horizontal axis hydrokinetic turbines are one amongst the various devices used to extract this energy. However, the low power density of the technique is an important barrier to its commercialization. While the analytical Betz limit for extracting available kinetic power of water streams is 0.59, a practical power coefficient of 0.45 looks ideal. Although the Betz limit cannot be overcome, a shroud placed around the rotor could increases the CP. This paper presents results of an experimental work done on two different shrouds to study how much a horizontal axis hydrokinetic turbine gains using shrouds.