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DC Field | Value | Language |
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dc.contributor.author | Bianchi, G | - |
dc.contributor.author | Kennedy, S | - |
dc.contributor.author | Zaher, O | - |
dc.contributor.author | Tassou, S | - |
dc.contributor.author | Miller, J | - |
dc.contributor.author | Jouhara, H | - |
dc.date.accessioned | 2017-09-22T12:12:20Z | - |
dc.date.available | 2017-09-14 | - |
dc.date.available | 2017-09-22T12:12:20Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Energy Procedia, 2017, 129 pp. 347 - 354 | en_US |
dc.identifier.issn | 1876-6102 | - |
dc.identifier.uri | http://bura.brunel.ac.uk/handle/2438/15185 | - |
dc.description.abstract | Abstract Low temperature (<100°C) streams have the largest share of waste heat recovery potential and may represent an attractive opportunity for a sustainable economy. Among the bottoming thermodynamic approaches that have been proposed to convert this waste heat into electricity, the Trilateral Flash Cycle (TFC) proved to be theoretically capable to recover more heat from a low-temperature single-phase heat source than any simple Rankine cycle. However, the commercialization of TFC recovery units has been so far prevented by the lack of an expander technology that should efficiently operate with high mass flow rates of a two-phase flashing flow. A promising candidate to tackle these challenges is the twin-screw technology thanks to its positive displacement nature and the capability to run at high revolution speeds without remarkable efficiency drops. In the current research work, a twin-screw expander has been modeled in the commercial software GT-SUITE™. The modeling activity resulted in a two-phase chamber model based on the coupling of the conservation equations and the REFPROP library to calculate the thermophysical properties of the liquid-vapor mixture of the R245fa working fluid at each time step. Using pre-processed geometrical data, the model includes a detailed breakdown of the leakage paths and allows to retrieve key information for a future optimization of the machine such as the indicator diagram and the quality-angle diagram. Parametric analyses were eventually carried out to assess the expander behavior at different operating conditions, namely manometric expansion ratio, revolution speed and inlet quality. | en_US |
dc.description.sponsorship | Research presented in this paper has received funding from: i) the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 680599, ii) Innovate UK (Project No. 61995-431253, iii) Engineering and Physical Sciences Research Council UK (EPSRC), Grant No. EP/P510294/1; iv) Research Councils UK (RCUK), Grant No. EP/K011820/1. The authors would like to acknowledge the financial support from these organisations as well as contributions from industry partners: Spirax Sarco Engineering PLC, Howden Compressors Ltd, Tata Steel, Artic Circle Ltd, Cooper Tires Ltd, Industrial Power Units Ltd. The authors also acknowledge contributions from Mr. Jonathan Harrison and Mr. Marek Lehocky of Gamma Technologies during the model development. | en_US |
dc.format.extent | 347 - 354 | - |
dc.language.iso | en | en_US |
dc.subject | Trilateral Flash Cycle | en_US |
dc.subject | Twin screw expander | en_US |
dc.subject | two phase expander | en_US |
dc.subject | low grade heat to power conversion | en_US |
dc.title | Two-phase chamber modeling of a twin-screw expander for Trilateral Flash Cycle applications | en_US |
dc.type | Article | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/j.egypro.2017.09.208 | - |
dc.relation.isPartOf | Energy Procedia | - |
pubs.notes | 4th International Seminar on ORC Power Systems September 13-15th 2017 POLITECNICO DI MILANO BOVISA CAMPUS MILANO, ITALY keywords: Trilateral Flash Cycle keywords: Trilateral Flash Cycle keywords: Trilateral Flash Cycle keywords: Trilateral Flash Cycle | - |
pubs.publication-status | Published | - |
pubs.volume | 129 | - |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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Fulltext.pdf | 1.24 MB | Adobe PDF | View/Open |
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