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Investigation of the unsteady characteristic in a scroll compressor of a heat pump system for electric vehicles

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Abstract

The scroll compressor is widely utilized in the heat pump air-conditioning of electric vehicles. However, the scroll compressor cannot show a good performance in low ambient. This work presents three-dimensional transient simulation models of no-injection and vapor-injection scroll compressors to investigate the internal flow characteristics using R134a. The different shapes of the vapor-injection pipe holes, including the center distance of two interlinked circular and connection structures, are also discussed in relation to the scroll compressor performance. The results reveal that the isentropic efficiency of the scroll compressor increased by 8.51 ~ 9.35% and the discharge temperature decreased by 6.00 ~ 9.08 K when the different shapes of vapor-injection pipes are added. When the center distance of two interlinked circular injection holes grows, the compressor’s isentropic efficiency increases and the discharge temperature decreases. Additionally, the number of eddies decreased when the double-arc interlinked construction is used for the vapor-injection pipe. Overall, it has been discovered that vapor-injection technology can improve the isentropic efficiency of a scroll compressor while also lowering the discharge temperature. Moreover, using double-arc interlinked injection holes could achieve better comprehensive performance.

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Funding

This work was supported by the National Natural Science Foundation of China [Grant Number: 21576245].

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Authors and Affiliations

  1. School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou, 450001, China

    Mengbo Peng, Dingbiao Wang, Xinxin Liu, Yushen Yang & Guanghui Wang

  2. School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, China

    Xu Peng

  3. Engineering Research Center of Energy Saving Technology and Equipment of Thermal Energy System, Ministry of Education, Zhengzhou, 450001, China

    Mengbo Peng, Xu Peng, Dingbiao Wang, Xinxin Liu, Yushen Yang & Guanghui Wang

  4. Guangdong Sanvo Holdings Co Limited, Zhongshan, 528400, China

    Bingyao Chen

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  1. Mengbo Peng
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  2. Xu Peng
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Correspondence to Dingbiao Wang.

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Peng, M., Peng, X., Wang, D. et al. Investigation of the unsteady characteristic in a scroll compressor of a heat pump system for electric vehicles. J Therm Anal Calorim 148, 965–976 (2023). https://doi.org/10.1007/s10973-022-11816-4

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