THERMAL SCIENCE

International Scientific Journal

Dengke Zhao

,

Haijun Li

,

Gang Chen

,

Yibo Zhang

,

Jiayang Gao

EXPERIMENTAL STUDY ON OPTIMAL OPERATION CONTROL STRATEGY OF QUASI-TWO-STAGE COMPRESSION HEAT PUMP AIR CONDITIONING SYSTEM BASED ON FULL MICRO-CHANNEL HEAT EXCHANGER

ABSTRACT
In environments with significant temperature variations, the quasi-two-stage compression heat pump air conditioning system demonstrates notable advantages in mitigating key challenges such as high compressor exhaust temperature, exhaust pressure, low system heat exchange, and COP. This study optimizes the optimal refrigerant charge amount and superheat set-point control strategy of the electronic expansion valve for the system. By adjusting the method of supplying the gas and the superheat set-point of the electronic expansion valve, the system is able to achieve stable and efficient operation. The experimental findings indicate that following the optimization of operational control strategies, the system heat exchange capacity increased by 18.8%, the COP improved by 12.3%, and the compressor exhaust temperature decreased by 11.3°C.
KEYWORDS
full micro-channel, quasi-two-stage compression, heat pump, control strategy
PAPER SUBMITTED: 2024-05-16
PAPER REVISED: 2024-07-07
PAPER ACCEPTED: 2024-07-07
PUBLISHED ONLINE: 2025-07-06
DOI REFERENCE: https://doi.org/10.2298/TSCI2503971Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE Issue 3, PAGES [1971 - 1979]
REFERENCES
  1. Lee, D., Experimental Study on the Heat Pump System Using R134a Refrigerant for Zero-Emission Vehicles, International Journal of Automotive Technology, 16 (2015), 11, pp. 923-928
  2. Kwon, C., et al., Performance Evaluation of a Vapor Injection Heat Pump System for Electric Vehicles, International Journal of Refrigeration, 74 (2017), 2, pp. 138-150
  3. Zhou, G. L., et al., Experimental Study of Series and Parallel Waste Heat Recovery Modes for Electric Vehicle Heat Pump System, Fluid Machinery, 49 (2021), 5, pp. 91-96
  4. Cao, J., et al., Study on the Characteristics of Vapor Injection of Two-Pair-Chamber Scroll Compressor for Electric Vehicle Heat Pump System, Fluid Machinery, 49 (2021), 11, pp. 18-24
  5. Liu, M. K., et al., Experimental Study on Refrigerant Charge of Heat Pump Air Conditioning System in an Electric Vehicle, Fluid Machinery, 48 (2020), 5, pp. 82-88
  6. Liu, M. K., et al., Experimental Study on Heating Performance of Electric Vehicle Heat Pump Air Conditioning System in Winter, Journal of Refrigeration, 41 (2020), 4, pp. 45-51
  7. Zhang, Z. B., et al., Experimental Study on the Influence of Refrigerant Charge on the Performance of Microchannel Evaporator Room Air Conditioner, Journal of Southeast University (Natural Science Edition), 44 (2014), 3, pp. 567-572
  8. Tian, H. Z., et al., Review of Electronic Expansion Valve Technology, Fluid Engineering, 20 (1992), 7, pp. 55-60
  9. Shi, H., et al., Influence of Refrigerant Charge on the Supplemental Gas Enthalpy Boost Heat Pump System, Journal of Refrigeration, 43 (2022), 6, pp. 114-120
  10. Choi, J. M., Kim, Y. C., The Effects of Improper Refrigerant Charge on the Performance of a Heat Pump with an Electronic Expansion Valve and Capillary Tube, Energy, 27 (2002), 4, pp. 391-404
  11. Wang, J. J., Research on Design Method of the Low Ambient Temperature Air-Source Heat Pump Unit and the Vapor-Injection Mechanism (in Chinese), Harbin Institute of Technology, 2022, 6, doi.org/10.27061/d.cnki.ghgdu.2022.000398
  12. Yu, Z. Q., et al., Optimization of Electronic Expansion Valve Control Strategy for Air Source Heat Pump Units in Low Ambient Temperature Environment, Refrigeration and Air Conditioning, 23 (2023), 10, pp. 17-20
  13. Wang, Y. H., Throttling Characteristics and Injection Strategies for High Efficiency and Environmental Protection High Temperature Heat Pump Systems (in Chinese), Xi'an University of Architecture and Technology, 2024, 5, doi.org/10.27393/d.cnki.gxazu.2023.001435
  14. Samal, S. K., Moharana, M. K., Thermo-Hydraulic and Entropy Generation Analysis of Recharging Microchannel Using Water-Based Graphene-Silver Hybrid Nanofluid, Journal of Thermal Analysis and Calorimetry, 143 (2021), 6, pp. 4131-4148
  15. 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
  16. Fattahi, M., et al., Aluminum Nitride as an Alternative Ceramic for Fabrication of Microchannel Heat Exchangers: A Numerical Study, Ceramics International, 46 (2020), 8, pp. 11647-11657
  17. He, J.-H., et al., Piezoelectric Biosensor Based on Ultrasensitive MEMS System, Sensors and Actuators A: Physical, 376 (2024), 115664
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Experimental study on optimal operation control strategy of quasi-two-stage compression heat pump air conditioning system based on full micro-channel heat exchanger

2025 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