THERMAL SCIENCE
International Scientific Journal
EXPERIMENTAL STUDY ON QUASI-TWO-STAGE COMPRESSION HEAT PUMP AIR CONDITIONING SYSTEM FOR PURE ELECTRIC BUS
ABSTRACT
In response to the challenge of achieving efficient low temperature heating performance in heat pump air conditioning systems for pure electric buses, a quasi-two-stage compression heat pump air conditioning system incorporating fully micro-channel technology is developed. A series of experimental studies were conducted to investigate the influence of different compressor speeds and fan frequencies on system performance, resulting in corresponding performance curves. In a low temperature environment of -10°C, the compressor exhaust temperature is maintained at 44.34°C. Concurrently, the system heat exchange capacity is enhanced by 11.3% to 47% compared to the non-supplemented air system. Moreover, at a compressor speed of 4000 rpm, the system COP was found to be 2.72. The implementation of variable frequency compressor speed and fan frequency in the pure electric bus heat pump system has resulted in enhanced system performance, leading to energy savings.
KEYWORDS
PAPER SUBMITTED: 2024-05-16
PAPER REVISED: 2024-07-07
PAPER ACCEPTED: 2024-07-07
PUBLISHED ONLINE: 2025-07-06
THERMAL SCIENCE YEAR
2025, VOLUME
29, ISSUE
Issue 3, PAGES [1981 - 1989]
- Hong, Y., Prospect of China's New Energy Vehicle Development (in Chinese), Auto Sci-Tech (2009), 4, pp. 7-10, doi.org/10.3969/j.issn.1005-2550.2009.04.003
- Chen, H., Performance Evaluation and Design of Heat Pump Air Conditioning for Electric Bus (in Chinese), Zhong yuan University of Technology, 2017, doi.org/CNKI:CDMD:2.1016.239921
- Wang, T., et al., Multi-Parallel Flow Condenser Model for Bus Air Conditioning (in Chinese), Journal of Hefei University of Technology, 30 (2007), 12, pp. 1631-1634
- Wang, T., et al., Application Research of Parallel Flow Condenser in 12 m Bus Air Conditioning (in Chinese), Journal of Refrigeration, 29 (2008), 5, pp. 24-27
- Hou, H., Wu, Z., Study on Heat Transfer Performance of Parallel Flow Condenser with Different Inlet Block-Fitting Positions (in Chinese), Modern Vehicle Power (2023), 1, pp. 12-16, doi.org/10.3969/j.issn.1671-5446.2023.01.004
- Tang, H., et al., Application Research on Economizer System of Scroll Compressor (in Chinese), Fluid Machinery, 35 (2007), 9, pp. 55-58
- Wang, C., Performance Analysis and Parameter Optimization of Economizer System Coupled with Scroll Compressor (in Chinese), Xi'an University of Architecture and Technology, 2020, 6, doi.org/10.27393/d.cnki.gxazu.2019.000694
- Li, H., Qin, X., et al., Research on Refrigeration Performance of Electric Vehicle Heat Pump Air-Conditioning System with Quasi-Two-Stage Compression (in Chinese), Fluid Machinery, 51 (2023), 9, pp. 13-19
- Zhao, L., et al., Thermodynamics for 5G Technology and Energy Harvesting and Relative Topics, Thermal Science, 28 (2024), 3A, pp. 2009-2014
- He, J.-H., Abd-Elazem, N. Y., The Carbon Nanotube-Embedded Boundary Layer Theory for Energy Harvesting, Facta Univ.-Ser. Mech., 20 (2022), 2, pp. 211-235
- Kou, S. J., et al., Fractal Boundary Layer and Its Basic Properties, Fractals, 30 (2022), 9, 2250172
- He, J.-H., et al., Piezoelectric Biosensor Based on Ultrasensitive MEMS System, Sensors and Actuators A: Physical (2024), 115664
- Tian, D., He, C. H. A Fractal Micro-Electromechanical System and Its Pull-In Stability, Journal of Low Frequency Noise Vibration and Active Control, 40 (2021), 3, pp. 1380-1386
- Zhou, Y., Application Technology of R407c in Bus Air Conditioning (in Chinese), Bus & Coach Technology and Research (2015), 3, pp. 49-52, doi.org/10.15917/j.cnki.10063331.2015.03.015