International Scientific Journal


Roots power machine has obvious advantages in low and medium temperature waste heat recovery. The existing roots power machine has the problem of internal flow field disturbance, which seriously affects the power generation efficiency of the power machine. In order to solve the problem of disturbance of the internal flow field of roots power machine, the traditional involute rotor roots power machine is improved, and the roots power machine based on negative displacement involute rotor is proposed. The structure model and turbulence model of roots power machine are constructed, and the internal flow field simulation of roots power machine is realized by CFD. The pressure contour and torque change of roots power machine before and after improvement are compared, and the experimental research on the improved structure is carried out. The results show that the intensity of flow field disturbance in the modified involute rotor roots power machine decreases, and the working performance of the roots power machine improves,which provides a reference for the structural improvement and performance optimization of roots power machine.
PAPER REVISED: 2020-07-06
PAPER ACCEPTED: 2020-07-13
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THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 2, PAGES [955 - 965]
  1. Papes, I., et al., Development of a Thermodynamic Low Order Model for a Twin Screw Expander with Emphasis on Pulsations in the Inlet Pipe, Applied Thermal Engineering, 103 (2016), June, pp. 909-919
  2. Zoghi, M., et al., Thermo-Economic Assessment of a Novel Trigeneration System Based on Coupling of Organic Rankine Cycle and Absorption Compression Cooling and Power System for Waste Heat Recovery, Energy Conversion and Management, 196 (2019), Sept., pp. 567-580
  3. Deng, S. X., et al., Global Well Posedness of a Class of Dissipative Thermoelastic Fluids Based on Fractal Theory and Thermal Science Analysis, Thermal Science, 23 (2019), 4, pp. 2461-2469
  4. Qiu, Y. Y, Solving a Class of Boundary Value Problems by LSQR, Thermal Science, 21 (2017), 4, pp. 1719-1724
  5. Chatzopoulou, M. A., et al., Off-Design Optimisation of Organic Rankine Cycle (ORC) Engines with Different Heat Exchangers and Volumetric Expanders in Waste Heat Recovery Applications, Applied Energy, 253 (2019), Nov., pp. 1211-1236
  6. Zhang, S., Gao, X. D., Analytical Treatment on a New Generalized Ablowitz-Kaup-Newell-Segur Hierarchy of Thermal and Fluid Equations, Thermal Science, 21 (2017), 4, pp. 1607-1612
  7. Zheng, S. Q., Lu, J. F., A Relaxed Non-Linear Inexact Uzawa Algorithm for Stokes Problem, Thermal Science, 23 (2019), 4, pp. 2323-2331.
  8. Kong, X., et al., Design and Feasibility Study of Roots-Type Power Machine Rotor Based on Numerical Simulation, Neural Computing & Applications, 32 (2020), Oct., pp. 223-234
  9. Wang, D. Y., Research on Structural Optimization of Roots Steam Power Machine, Tianjin: Hebei University of Technology, 2016
  10. Li, Y. Y., et al., Thermodynamic Analysis of a Novel Combined Cooling and Power System Utilizing Liquefied Natural Gas (LNG) Cryogenic Energy and Low-Temperature Waste Heat, Energy, 199 (2020), May, 117479
  11. Manjunath, K. et al., Entropy Generation and Thermoeconomic Analysis of Printed Circuit Heat Exchanger Using Different Materials for Supercritical CO2 Based Waste Heat Recovery, Materials Today: Proceedings, 21 (2020), 3, pp. 1525-1532
  12. Chen, W. H., et al., A Computational Fluid Dynamics (CFD) Approach of Thermoelectric Generator (TEG) for Power Generation, Applied Thermal Engineering, 173 (2020), June, 115203
  13. Imran, M., et al., Volumetric Expanders for Low Grade Heat and Waste Heat Recovery Applications, Renewable and Sustainable Energy Reviews, 57 (2016), May, pp. 1090-1109
  14. Oluleye, G. et al., Evaluating the Potential of Process Sites for Waste Heat Recovery, Chemical Engineering Transactions, 39 (2016), Jan., pp. 627-646
  15. Xu, S., et al., Heat Transfer Performance of a Fractal Silicon Micro-Channel Heat Sink Subjected to Pulsation Flow, International Journal of Heat and Mass Transfer, 81 (2015), Feb., pp. 33-40
  16. Arellano, C., et al., Envelope Condition Method with an Application Default Risk Models, SSRN Electronic Journal, 69 (2016), Aug., pp. 436-459
  17. Cataldo, F. et al., Fluid Selection of Organic Rankine Cycle for Low-Temperature Waste Heat Recovery Based on Thermal Optimization, Energy, 72 (2014), Aug., pp. 159-167
  18. Kong, X., et al., Design and Feasibility Study of Roots-Type Power Machine Rotor Based on Numerical Simulation, Neural Computing and Applications, 32 (2020), 13, pp. 223-234
  19. Wang, D. Y., Research on Structural Optimization of Roots Steam Power Machine, Ph. D. thesis, Hebei University of Technology, Tianjin, China, 2016
  20. Davide, Z. et al., Review and Update on the Geometry Modelling of Single-Screw Machines with Emphasis on Expanders, International Journal of Refrigeration, 92 (2018), Aug., pp. 10-26
  21. Wang, Y. et al., The LIS-PRO: A New Concept of Power Generation from Low Temperature Heat Using Liquid-Phase Ion-Stripping-Induced Salinity Gradient, Energy, 200 (2020), June, 117593
  22. Moser, S., et al., Designing the Heat Merit Order to Determine the Value of Industrial Waste Heat for District Heating Systems, Energy, 200 (2020), June, 117579

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