THERMAL SCIENCE

International Scientific Journal

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Liming Chen

,

Bin Xie

FROST MEASUREMENT OF AIR SOURCE HEAT PUMP HEAT EXCHANGERS BASED ON IMAGE RECOGNITION PROCESSING TECHNOLOGY

ABSTRACT
In order to understand the application of frost measurement of air source heat pump heat exchanger, a research on frost measurement of air source heat pump heat exchanger based on image recognition processing technology is put forward. In this paper, the scheme design of defrosting control system based on image processing technology is introduced, and the frost degree coefficient of outdoor heat exchanger fin surface is introduced to characterize the frost degree of fin surface. Secondly, the experimental environment room was built, and the conventional defrosting control method of the existing heat pump unit was tested on the spot. It was found that in the air temperature of -6~0°C and the air relative humidity of 86~92%, the unit appeared the phenomenon of "defrosting in time" and "defrosting without frost". Finally, the change of frost layer on the surface of the outdoor heat exchanger fin during defrosting is analyzed, and the coefficient of frost degree on the surface of the fin is calculated and analyzed. At the beginning of defrosting, due to the large degree of frost, the P-value of the frost degree coefficient on the surface of the fin is close to 1, when the defrosting is carried out for 125 seconds, the P-value of the frost degree coefficient on the surface of the fin decreases sharply to 0.09, when the defrosting is completed, the P-value of the frost degree coefficient on the surface of the outdoor heat exchanger is maintained at about 0.04. The defrosting control method of air source heat pump based on image processing technology is proposed in this paper, and its technical feasibility and effect are verified by experimental tests, which lays a foundation for future popularization and application.
KEYWORDS
image recognition, air source, heat pump heat exchanger
PAPER SUBMITTED: 2023-06-26
PAPER REVISED: 2023-08-24
PAPER ACCEPTED: 2023-09-28
PUBLISHED ONLINE: 2024-04-13
DOI REFERENCE: https://doi.org/10.2298/TSCI2402363C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 2, PAGES [1363 - 1370]
REFERENCES
  1. Hao, Y., et al., Methods of Image Recognition of Overhead Power Line Insulators and Ice Types Based on Deep Weakly-Supervised and Transfer Learning, IET Generation, Transmission and Distribution, 41 (2022), 11, 16
  2. Aref Rajabi, et al., Optimization of Conjugate Heat Transfer in the Electrofusion Joint Using Taguchi Method, Thermal Science, 23 (2019), 5B, pp. 3047-3057
  3. Yan, W., et al., Research on Non-Linear Distorted Image Recognition Based on Artificial Neural Network Algorithm, Journal of Interconnection Networks, 22 (2022), Suppl. 06, S41
  4. Rangayya, R., et al., An Enhanced Segmentation Technique and Improved Support Vector Machine Classifier for Facial Image Recognition, International Journal of Intelligent Computing and Cybernetics, 41 (2022), 2, 15
  5. Chen, M., et al., Learning to Focus: Cascaded Feature Matching Network for Few-Shot Image Recognition, Science China Information Sciences, 64 (2021), 92105
  6. Liu, X., et al., Research and Application of Image Recognition of Substation Inspection Robots Based on Edge Computing and Incremental Learning, Non-Linear Optics, Quantum Optics, 41 (2022), 1-2, 56
  7. Lee, S., et al., Uav Pilot Status Identification Algorithm Using Image Recognition and Biosignals, Journal of Advances in Information Technology, 74 (2022), 5, 13
  8. Wei, C., et al., Development of a New Silicate Thermal Insulation Coating and Analysis of Heat Storage Characteristics, Thermal Science, 27 (2023), 2A, pp. 949-957
  9. Feng, J., et al., Research on the Application of Image Recognition Technology in Transformer Equipment Fault Monitoring, Non-Linear Optics, Quantum Optics, 41 (2022), 1-2, 56
  10. Guo, B., Friction Heat Energy Recovery System Based on Hydraulic Brake System by Wire of Heavy Vehicle, Thermal Science, 27 (2023), 2A, pp. 1159-1166
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Frost measurement of air source heat pump heat exchangers based on image recognition processing technology

© 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