THERMAL SCIENCE

International Scientific Journal

Siqi Cui

,

Jing Bai

,

Zhiyong Su

,

Chao Zhang

,

Chang Qin

,

Shuwei Geng

VAPOR INJECTION TECHNOLOGY FOR HEAT-PUMP AIR CONDITIONER OF ELECTRIC BUS IN AN EXTREME ENVIRONMENT

ABSTRACT
In order to solve the problems of a heat pump air conditioner for an electric bus under extreme conditions, such as the large compression ratio, the high discharge temperature, the reduced system performance, the frequent shutdown of the compressor due to the overheat protection, this paper proposes a vapor injection technology with an economizer, and carries out a theoretical analysis of the process to reveal the effect of the vapor injection technology on the performance of the air conditioner. The results show that at ultra-low temperature heating operating conditions, when the compressor speed increases from 2000 rpm to 5000 rpm, the heating capacity of the vapor injection system increases from 16.2% to 22.7%, and the heating performance coefficient increases from 2.8% to 14.2%.
KEYWORDS
vapor injection technology, air conditioner, discharge temperature, heating performance coefficient
PAPER SUBMITTED: 2020-08-15
PAPER REVISED: 2021-10-03
PAPER ACCEPTED: 2021-10-03
PUBLISHED ONLINE: 2022-07-16
DOI REFERENCE: https://doi.org/10.2298/TSCI2203683C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 3, PAGES [2683 - 2691]
REFERENCES
  1. Dutta, A., et al., An Investigation of the Performance of a Scroll Compressor Under Liquid Refrigerant Injection, International Journal of Refrigeration, 24 (2001), 6, pp. 577-587
  2. Ying, X., et al., Influence of Suction Jet on Scroll Compressor and System Performance, Journal of Re-frigeration, 36 (2015), 5, pp. 10-15
  3. Fan, B., Wang, H., Application and Theoretical Analysis of Spray Cooling in High Temperature Air Conditioning, Refrigeration and Air-conditioning, 25 (2011), 2, pp. 175-178
  4. Jia, Q. L., et al., Experimental Study on Improving the Performance of Air Source Heat Pump in High Temperature Conditions in Summer, Refrigeration and Air Conditioning, 14 (2014), 8, pp. 113-118
  5. Fei, J. Y., et al., Effect of Suction Jet on Performance of Air Source Heat Pump Water Heater, Journal of Xi'an Jiaotong University, 42 (2008), 7, pp. 818-822
  6. Cui, S. Q., et al., Experimental Research on the Application of Low Pressure Vapor Injection Technolo-gy to The Maximum Operating Refrigeration Conditions of Passenger Air-Conditioning, Cryogenic and Superconductivity, 44 (2016), 10, pp. 72-76
  7. He, Y. G., et al., Experimental Research on the Application of Supplemental Gas Technology in High Temperature Heat Pump, Journal of Xi'an Jiaotong University, 49 (2015), 6, pp. 103-108
  8. Xu, X., Wang, Y. H., Refrigerant Injection for Heat Pumping/Air Conditioning Systems: Literature Re-view and challenges discussions, International Journal of Refrigeration, 34(2010), 2, pp. 402-415
  9. Heo, J., et al. Comparison of the Heating Performance of Air-Source Heat Pumps Using Various Types of Refrigerant Injection, International Journal of Refrigeration, 34 (2011), 2, pp. 444-453
  10. Hu, W. J., et al., Research on Flash Steam Cooling Technology and R134a for High Temperature Air Conditioners, Fluid Machinery, 43 (2015), 10, pp. 73-78
  11. Yin, H. Y., Experimental Research and Analysis of Low temperature Heat Pump Air Conditioning Sys-tem for Electric Vehicles (in Chinese), Refrigeration and Air-Conditioning, (2016), 7, pp. 73-77
  12. Chai, Y. P., et al., Experimental Study of R134a Quasi-Secondary Compression Refrigeration/Heat Pump System with Flash Tank Air-Injection (in Chinese), Journal of Refrigeration, (2017), 2, pp. 11-16
  13. Tang, J. C., et al., Experimental Study on Quasi-Double Stage Compression Heat Pump Performance of Electric Vehicle Air-conditioner Using Scroll Compressor, Journal of Refrigeration, 39 (2018), 1, pp. 134-139
  14. Zhang, J. F., et al., Intermediate Replenishment Technology of Scroll Compressor, Refrigeration and Air-conditioning, 12 (2012), 2, pp. 22-24
  15. Wu, Y. Z., Refrigeration Principles and Equipment (3rd Edition), Xi'an Jiaotong University Press, Xi'an, China, 2010, pp. 83-90
  16. Wang, X., et al., The Modelling and Energy Efficiency Analysis of Thermal Energy Management Oper-ation of Ground Source Heat Pump Air-Conditioning System, Thermal Science, 24 (2020), 5, pp. 3229-3237
  17. Fu, C., Zhao, X., Study on Energy Efficiency Evaluation and Influencing Factors of Ground Source Thermal Energy Management System Operation, Thermal Science, 24 (2020), 5, pp. 3319-2237
  18. He, J. H., A New Proof of the Dual Optimization Problem and Its Application to the Optimal Material Distribution of SiC/Graphene Composite, Reports in Mechanical Engineering, 1 (2020), 1, pp. 187-191
  19. Liu, X. Y., et al., Optimization of a Fractal Electrode-Level Charge Transport Model, Thermal Science, 25 (2021), 3, pp. 2213-2220
PDF VERSION [DOWNLOAD]
Vapor injection technology for heat-pump air conditioner of electric bus in an extreme environment

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence