Experimental and Numerical Analyses on the Rotary Vane Expander Operating Conditions in a Micro Organic Rankine Cycle System
Abstract
:1. Introduction
2. Description of the Experimental Test-Stand and the Experiment Results
2.1. Description of the Test-Stand and the Multi-Vane Expander
2.2. The Experimental Description and Results
3. Numerical Modelling
3.1. The Governing Equations
3.2. The Computational Grid
3.3. Model Details
4. Results and Discussion
5. Summary and Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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No. | ths (°C) | pin (bar) | tin (°C) | pout (bar) | tout (°C) | n (rev/min) |
---|---|---|---|---|---|---|
1 | 45 | 2.0 | 39.0 | 1.3 | 37.0 | 700 |
2 | 55 | 2.5 | 46.0 | 1.2 | 37.0 | 3280 |
3 | 65 | 3.0 | 52.0 | 1.5 | 45.0 | 3300 |
4 | 75 | 4.2 | 60.0 | 1.2 | 53.0 | 2900 |
5 | 85 | 5.2 | 71.0 | 1.2 | 62.0 | 2950 |
No. | σ | hin | sin | hout | hout s | sout | ls | li | ηi |
---|---|---|---|---|---|---|---|---|---|
kJ/kg | kJ/kgK | kJ/kg | kJ/kg | kJ/kgK | kJ/kg | kJ/kg | (-) | ||
1 | 1.54 | 404.94 | 1.665 | 403.98 | 402.71 | 1.669 | 2.22 | 0.96 | 0.431 |
2 | 2.08 | 409.12 | 1.666 | 404.94 | 401.95 | 1.676 | 7.17 | 4.18 | 0.583 |
3 | 2.00 | 412.69 | 1.668 | 408.91 | 406.04 | 1.677 | 6.64 | 3.78 | 0.569 |
4 | 3.50 | 417.4 | 1.671 | 413.92 | 403.25 | 1.704 | 14.15 | 3.47 | 0.246 |
5 | 4.33 | 423.8 | 1.675 | 420.47 | 404.47 | 1.724 | 19.33 | 3.32 | 0.172 |
Parameter | Value | Remarks |
---|---|---|
Properties at the inlet | pin, Tin | From measurements |
Properties at the outlet | pout | From measurements |
Rotational speed | n | From measurements |
Time step | 5.5 × 10−5 s | 1 degree of revolution |
Total time | 0.1 s | 5 full revolutions |
Turbulence model | k-epsilon | Standard model |
Wall heat transfer | Adiabatic | - |
Vane-to-wall clearance | 40 μm | - |
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Kolasiński, P.; Błasiak, P.; Rak, J. Experimental and Numerical Analyses on the Rotary Vane Expander Operating Conditions in a Micro Organic Rankine Cycle System. Energies 2016, 9, 606. https://doi.org/10.3390/en9080606
Kolasiński P, Błasiak P, Rak J. Experimental and Numerical Analyses on the Rotary Vane Expander Operating Conditions in a Micro Organic Rankine Cycle System. Energies. 2016; 9(8):606. https://doi.org/10.3390/en9080606
Chicago/Turabian StyleKolasiński, Piotr, Przemysław Błasiak, and Józef Rak. 2016. "Experimental and Numerical Analyses on the Rotary Vane Expander Operating Conditions in a Micro Organic Rankine Cycle System" Energies 9, no. 8: 606. https://doi.org/10.3390/en9080606