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Numerical study of heat transfer influence on the performance of a single screw expander for Organic Rankine Cycle

Author

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  • Wang, Wei
  • Shen, Li-li
  • Chen, Ru-meng
  • Wu, Yu-ting
  • Ma, Chong-fang

Abstract

Heat dissipation was the one of the irreversible losses of expanders. For small capacity expanders, the influence of it on the performance of expanders might be more significant. Single screw expander (SSE) was a type of volumetric expander, which has a certain advantages in the Organic Rankine Cycle system. Investigating the characteristics of heat transfer in SSE was necessary because of the influence on the performance. This study discussed the effect of heat transfer on thermodynamic performance for a SSE. Combined leakage and heat transfer, the thermodynamic model of working process was established firstly. Lubricating oil heat absorption was considered in heat transfer model. For heat transfer in the body, it was divided into 17 parts and calculated the temperature distribution by lumped parameter method. The coupling model was computational programmed by the method of multiple separate solutions. Then, experimental study on heat dissipation of SSE for Organic Rankine Cycle was carried out and verified the model. R123 was selected as working fluid. Finally, the influence of heat transfer on the performance of the SSE was analyzed from different influence factors. From the simulation results, the range of heat transfer influence for the power was from 1.91% to 4.51%, and that for the efficiency was from 2.72% to 5.78%, under the different working conditions. Moreover, the effect of heat transfer on performance at low inlet pressure was greater than that at high inlet pressure. It can also be seen that the effect of heat transfer on the efficiency was greater than that on the power. Therefore, it could be concluded that the effect of heat transfer on the performance of SSEs was relatively small.

Suggested Citation

  • Wang, Wei & Shen, Li-li & Chen, Ru-meng & Wu, Yu-ting & Ma, Chong-fang, 2020. "Numerical study of heat transfer influence on the performance of a single screw expander for Organic Rankine Cycle," Energy, Elsevier, vol. 193(C).
    • Handle: RePEc:eee:energy:v:193:y:2020:i:c:s0360544219323783
    DOI: 10.1016/j.energy.2019.116683
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    References listed on IDEAS

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    Cited by:

    1. Wang, Wei & Huo, Jia-hui & Tao, Yue-ting & Lei, Biao & Wu, Yu-ting & Ma, Chong-fang, 2023. "Semi-empirical modelling and analysis of single screw expanders considering inlet and exhaust pressure losses," Energy, Elsevier, vol. 266(C).
    2. Wang, Wei & Qiao, Han & Lei, Biao & Wu, Yu-ting & Ma, Chong-fang, 2021. "Experimental study on the influence of inlet and exhaust pressure loss on the performance of single screw expanders," Energy, Elsevier, vol. 232(C).
    3. Ping, Xu & Yang, Fubin & Zhang, Hongguang & Wang, Yan & Lei, Biao & Wu, Yuting, 2022. "Performance limits of the single screw expander in organic Rankine cycle with ensemble learning and hyperdimensional evolutionary many-objective optimization algorithm intervention," Energy, Elsevier, vol. 245(C).
    4. Casari, Nicola & Fadiga, Ettore & Pinelli, Michele & Randi, Saverio & Suman, Alessio & Ziviani, Davide, 2020. "Investigation of flow characteristics in a single screw expander: A numerical approach," Energy, Elsevier, vol. 213(C).

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