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Numerical Study of the Flow and Cooling of the Hydrogen-oxygen Combined Cycle Power Plant Turbine Vanes

Author: TangZuDing
Tutor: FuZheng
School: Harbin Engineering University
Course: Marine Engineering
Keywords: Hydrogen - oxygen combined cycle Turbine guide vane Numerical Simulation Temperature field Flow field
CLC: V235
Type: Master's thesis
Year: 2010
Downloads: 28
Quote: 0
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Abstract


Energy development and environmental protection are two important issues for the sustainable development of a modern society . Looking for a clean and efficient form of energy is the inevitable requirement of social development in the future . Hydrogen as a clean energy fuel in the future there will be more broad application prospects . The development of efficient hydrogen conversion is a hot research topic . The combined cycle power plant of the hydrogen - oxygen is a pure hydrogen as the fuel , pure oxygen as the oxidant , to generate a high - temperature high - pressure water vapor through direct combustion ( 1700 ° C ) , and then passed directly into a turbine for power dynamic form . Hydroxide complete combustion of the product is only water , the entire apparatus except that the excess water is discharged to the outside , there is no other emissions , the plant heat efficiency can reach 70% or more , a considerable efficiency of the fuel cell . Hydrogen - oxygen combined cycle power plant transplanted many conventional steam turbine and gas turbine technology , high operating parameters to achieve great power units , compared to fuel cell technology, which is a major advantage of the device . Reason why there is such a high thermal efficiency of hydrogen - oxygen combined cycle power plant main reason is that the device uses a high turbine inlet temperature and major technical problems faced by the hydrogen - oxygen combined cycle power plant , thus cooling of the turbine blades of the turbine the study of the cooling performance of the blade becomes very necessary. In this paper, numerical study of flow and cooling performance of the device first stage turbine guide vanes . In this study , three-dimensional model of a certain type of conventional gas turbine first stage turbine guide vane borrow heat coupled numerical simulation using ANSYS CFX 11.0 software on steam and gas turbine guide vanes as the working substance . Comparison of steam , gas working fluid flow and heat transfer in the corresponding conditions to identify the hydrogen - oxygen combined cycle power plant turbine guide vanes when the working fluid flow and heat transfer characteristics of high temperature and high pressure steam . Obtained by numerical calculation of the flow and heat transfer characteristics of the inside of the blade and the outside , including the blade external and internal cooling structure of the flow field characteristics , the blade cooling efficiency, the blade temperature field and the vane inner and outer surfaces of heat transfer coefficient distribution . Analysis of the impact of the different parameters of inlet cooling gas turbine cooling performance , and provide technical support for the design of the cooling of the turbine blades .

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