Design and manufacturing a small-scale radial-inflow turbine for clean organic Rankine power system

JOURNAL OF CLEANER PRODUCTION

卷:257

Article

Al Jubori, Ayad M.^1,3  Al-Mousawi, Fadhel N.²  Rahbar, Kiyarash³  Al-Dadah, Raya³  Mahmoud, Saad³ 

[1] Univ Technol Baghdad, Commun Engn Dept, Baghdad, Iraq

[2] Univ Karbala, Dept Mech Engn, Karbala, Iraq

[3] Univ Birmingham, Sch Engn, Birmingham, W Midlands, England

关键词: Organic Rankine cycle;    Radial-inflow turbine;    Preliminary design;    3D CFD simulations;    Thermodynamic analysis;    Organic fluids;    Turbine manufacturing;   

DOI  :  10.1016/j.jclepro.2020.120488

来源: Elsevier

【 摘 要 】

With growing on the energy demand and availability of the low-grade temperature heat source, the organic Rankine cycle as a power system can be efficiently utilized to generate electricity. The turbine design and its performance have the main impact on determining the system power and overall system efficiency. Therefore, design a small-scale organic Rankine system requires the development of an appropriate turbine. To achieve this aim, this work offers an innovative complete design method to develop a radial-inflow turbine for small-scale organic Rankine cycle power applications, which includes a preliminary design (i.e. one-dimensional design calculation phase) and a three-dimensional flow analysis using the computational fluid dynamic technique. A thermodynamic analysis of the organic Rankine cycle was integrated with the design methodology. Where the three-dimensional geometry model was built based on the thermodynamic and aerodynamic design, and then was imported into the ANSYS-CFX software to conduct viscous numerical simulations. The optimum design of the radial-inflow turbine was manufactured using a three-dimensional printing (pioneering) technique, and the experimental testing was conducted at off-design points to validate the turbine design. The evaluation of the turbine's performance (efficiency and power) was presented under design and off-design points in terms of rotational speeds, expansion ratios, and inlet temperatures with five different organic fluids. The turbine numerical results showed that R600 as a working fluid has a higher predicted turbine efficiency of 78.32% and power of 4.8 kW with cycle thermal efficiency of 9.15% compared with 8.045% for R245fa. Depending on the experimental results at off-design points, the highest cycle thermal efficiency of 4.25% with a turbine efficiency of 45.22% was achieved. These results assured the precision of the proposed PD methodology at off-design points in making performance maps of the turbine. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

Free