Applying image recognition to frost built-up detection in air source heat pumps

Zhaoyang Li, Wei Wang, Yuying Sun, Shiquan Wang, Shiming Deng and Yao Lin

Energy, 2021, vol. 233, issue C

Abstract: When a space heating ASHP unit is operated in frosting conditions, accurate defrosting is necessary to ensure its operating efficiency and output heating capacity. Therefore, to improve the accuracy of defrosting initiation of ASHPs under frosting-defrosting operations, a study on applying image recognition to frost built-up detection in ASHPs has been carried out and the study results are presented in this paper. Firstly, the principle of a novel frost built-up detection method based on image recognition is presented. Secondly, a series of experiments to examine the applicability of the novel frost built-up detection method with respect to shooting angle, imaging pixels, illumination level, and the temperature of outdoor coil surface are carried out. Thirdly, the novel frost built-up detection method was further modified based on the experimental result obtained, and the verification of the modified novel detection method is reported. It is shown that the use of the modified novel frost built-up detection method could properly account for the impact of changing illuminance level on the accuracy of image recognition, to ensure the accuracy of frost built-up detection when ASHPs are operated in frosting conditions.

Keywords: ASHP units; Frost detection; Image recognition; Defrosting initiating control; Experimental study (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221012524
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:233:y:2021:i:c:s0360544221012524

DOI: 10.1016/j.energy.2021.121004

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().