Development of efficient small scale axial turbine for solar driven organic rankine cycle

Ayad Al Jubori, Raya K. Al-Dadah, Saad Mahmoud, Khalil M. Khalil, A. S. Bahr Ennil

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

Recently, the increase in fossil fuel consumption and associated adverse impact on the environment led to significant interest in renewable energy sources like solar. This paper presents a new methodology that integrates the ORC cycle analysis with modeling of an efficient small scale subsonic axial turbine at low temperature heat sources using wide range of organic working fluids like R123, R134a, R141b, R152a, R245fa, R290 and isobutene. The work involves detailed turbine analysis including 1D mean line approach, extensive 3D CFD simulations and ORC cycle analysis at inlet total pressure ranging from 2-5 bar corresponding to temperature range from 275K-365K to achieve the best turbine and cycle performance. This work provides a more reliable data base for small scale organic working fluids instead of using the map of large scale gas turbine. The numerical simulation was performed using 3D RANS with SST turbulence model in ANSYS-CFX. Using iterative CFD simulations with various working fluids with subsonic inlet conditions, Mach number ranging from 0.6-0.65, results showed that using working fluid R123 for a turbine with mean diameter of 70mm, the maximum isentropic efficiency was 82% and power output 5.66 kW leading to cycle efficiency of 9.5%.

Original languageEnglish
Title of host publicationASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
Subtitle of host publicationCoal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems
PublisherAmerican Society of Mechanical Engineers(ASME)
Number of pages11
Volume3
ISBN (Electronic)978-0-7918-4974-3
DOIs
Publication statusPublished - 20 Sep 2016
EventASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016 - Seoul, Korea, Republic of
Duration: 13 Jun 201617 Jun 2016

Publication series

NameTurbo Expo: Power for Land, Sea, and Air (GT)

Conference

ConferenceASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016
Country/TerritoryKorea, Republic of
CitySeoul
Period13/06/1617/06/16

ASJC Scopus subject areas

  • Engineering(all)

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