期刊
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
卷 173, 期 -, 页码 -出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2021.107387
关键词
Holes angle; Three-dimensional cascade; Non-equilibrium condensation; Hot steam injection holes
In order to enhance the efficiency of steam turbines, injecting hot steam between the blades in a 3D manner was studied in this paper. The optimal angle for injection holes was found to be -60 degrees, resulting in reductions of 40% in liquid mass fraction, 22% in condensation loss, and 1% in kinetic energy. The economic cost was calculated at 0.56 ($/hour) with a hot steam injection hole size of 0.07.
Steam turbines play an undeniable role in the power generation cycle. In this paper, in order to increase the efficiency of steam turbines, hot steam is injected between the steam turbine blades in 3D mode. Therefore, by defining five comparative criteria (liquid mass fraction, condensation loss, kinetic energy, hot steam injection ratio, and economic cost), injections with holes in various angles are investigated. For this purpose, the effects of the angle of the hot steam injection holes are discussed at the suction side on the two-phase flow parameters. The optimal angle for hot steam injection holes is selected (- 60 degrees), at which liquid mass fraction, condensation loss, and kinetic energy are reduced by 40%, 22%, and 1%, respectively. In addition, economic costs and hot steam injection holes are 0.56 ($/hour) and 0.07 for the suggested case.
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