An inverse mean-line design method for optimizing radial outflow two-phase turbines in geothermal systems renewable energy

Li, H., Rane, S., Yu, Z. and Yu, G. (2021) An inverse mean-line design method for optimizing radial outflow two-phase turbines in geothermal systems renewable energy. Renewable Energy, 168, pp. 463-490. (doi: 10.1016/j.renene.2020.12.079)

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Abstract

Radial outflow two-phase turbine (ROTPT) is an impulse two-phase turbine used for total flow systems in applications like geothermal fields to utilize the two-phase geofluid energy effectively. This paper presented a one-dimensional nonequilibrium inverse mean-line design method of ROTPT. With prescribed pressure and blade angle distributions, the averaged geometry and flow parameters in the rotating impeller channels were derived along the flow direction, the pressure distribution was formulated on the pressure side (PS) and the suction side (SS), and performance parameters were deduced in the implementation of the presented algorithm, including torque, output power, efficiency, etc. By using the design method, a ROTPT for a geothermal system was constructed. The flow field of the ROTPT was simulated in CFX using the thermal phase change model, which was validated by experimental results. By evaluating the averaged distribution and examining the three-dimensional flow, it was suggested that the presented design was consistent with the averaged flow in ROTPT. Meanwhile, there were three-dimensional effects in the rotating channel causing the deviation between the design and CFD results. This paper provides a nonequilibrium solver for designing ROTPTs but also can bolster the development of two-phase flow with the phase change in curved rotating channels.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Li, Dr Hongyang and Yu, Professor Zhibin
Creator Roles:
Li, H.Conceptualization, Methodology, Software, Formal analysis, Investigation, Data curation, Writing – original draft, Visualization
Yu, Z.Conceptualization, Writing – review and editing, Supervision, Project administration, Funding acquisition
Authors: Li, H., Rane, S., Yu, Z., and Yu, G.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Renewable Energy
Publisher:Elsevier
ISSN:0960-1481
ISSN (Online):1879-0682
Published Online:21 December 2020
Copyright Holders:Copyright © 2020 Elsevier Ltd.
First Published:First published in Renewable Energy 168: 463-490
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
300663Geothermally Sourced Power and Freshwater Generation for Eastern AfricaZhibin YuEngineering and Physical Sciences Research Council (EPSRC)EP/P028829/1ENG - Systems Power & Energy
172394Thermally Driven Heat Pump Based on an Integrated Thermodynamic Cycle for Low Carbon Domestic Heating (Therma-Pump)Zhibin YuEngineering and Physical Sciences Research Council (EPSRC)EP/N020472/1ENG - Systems Power & Energy
300273An ORC power plant integrated with thermal energy storage to utilise renewable heat sources for distributed H&PProject Number; 102883Zhibin YuEngineering and Physical Sciences Research Council (EPSRC)EP/R003122/1ENG - Systems Power & Energy