Parametric analysis of the defrosting process of a reversible heat pump system for electric vehicles
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There is an optimal throttle valve opening in the defrosting process that makes defrosting time shorter and defrosting efficiency higher.
“there is an optimal throttle valve opening in defrosting process, which makes defrosting time shorter and defrosting efficiency higher.”
A too small throttle valve opening reduces refrigerant flow rate, causing a dramatic increase in defrosting time and reduced defrosting efficiency.
“a too small throttle valve opening will reduce the refrigerant flow rate, resulting in a dramatic increase in defrosting time and reduce defrosting efficiency.”
In reversible heat pump during reverse cycle defrosting, average COP with 30% reduced throttle opening was 47% lower than in heating mode; at best performance (100%), flow coefficient value was 13%.
“The average COP of 30% reduced throttle opening was 47% lower than that in heating mode, whereas in case of the best performance (100%), the flow coefficient value was 13%.”
Cites
Study of frost properties correlating with frost formation types
Hayashi, Y., Aoki, A., Adachi, S., & Hori, K. (1977) · Journal of Heat Transfer · doi:10.1115/1.3450675 · Cited by 402 · see citing works
Modeling non-uniform frost growth on a fin-and-tube heat exchanger
Padhmanabhan, S. K., Fisher, D. E., Cremaschi, L., & Moallem, E. (2011) · International Journal of Refrigeration · doi:10.1016/j.ijrefrig.2011.06.005 · Cited by 66 · see citing works
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Review on improvement for air source heat pump units during frosting and defrosting
Song, M., Deng, S., Dang, C., Mao, N., & Wang, Z. (2018) · Applied Energy · doi:10.1016/j.apenergy.2017.12.022 · Cited by 384 · see citing works
Review on the measurement and calculation of frost characteristics
Song, M., & Dang, C. (2018) · International Journal of Heat and Mass Transfer · doi:10.1016/j.ijheatmasstransfer.2018.03.094 · Cited by 212 · see citing works
Patil, M. S., Seo, J.-H., & Lee, M.-Y. (2017) · Applied Thermal Engineering · doi:10.1016/j.applthermaleng.2016.11.107 · Cited by 86 · see citing works
Steiner, A., & Rieberer, R. (2015) · International Journal of Refrigeration · doi:10.1016/j.ijrefrig.2015.04.018 · Cited by 39 · see citing works
Self-citationXiong, T., Ying, Y., Han, B., Yan, G., & Yu, J. (2021) · International Journal of Refrigeration · doi:10.1016/j.ijrefrig.2021.09.003 · Cited by 35 · see citing works
Xiong, T., Liu, G., Gao, Q., Yan, G., & Yu, J. (2023) · Journal of Building Engineering · doi:10.1016/j.jobe.2022.105654 · Cited by 26 · see citing works
Zhang, W., Li, W., & Hrnjak, P. (2024) · Applied Thermal Engineering · doi:10.1016/j.applthermaleng.2023.121892 · Cited by 13 · see citing works
Tang, L., Liu, X., He, S., & Li, Q. (2024) · Journal of Building Engineering · doi:10.1016/j.jobe.2024.108739 · Cited by 6 · see citing works
Xiong, T., Hu, L., Liu, G., & Yan, G. (2024) · Case Studies in Thermal Engineering · doi:10.1016/j.csite.2024.105069 · Cited by 4 · see citing works
- Authors
- Steiner, A., & Rieberer, R.
- Affiliations
- Virtual Vehicle Research GmbH (Austria) (AT)
- Graz University of Technology (AT)
- Corresponding author
- Steiner, Alois
- ORCID
- Rieberer, René
- Venue
- Applied Thermal Engineering
- Publisher
- Elsevier BV
- Published
- 2013-11
- Volume
- 61
- Issue
- 2
- Pages
- 393-400
- ISSN
- 1359-4311 (ISSN-L)
- OpenAlex
- W2083677190
- Cited by
- 58
- References
- 2
- Citations by year
- 2026: 4 · 2025: 2 · 2024: 6 · 2023: 9 · 2022: 3 · 2021: 5 · 2020: 1 · 2019: 6 · 2018: 4 · 2017: 5 · 2016: 5 · 2015: 6 · 2014: 2
- FWCI
- 5.75
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Applied Thermal Engineering (publishedVersion)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Refrigeration and Air Conditioning Technologies
- Physical Sciences › Engineering › Mechanical Engineering › Adsorption and Cooling Systems
- Physical Sciences › Engineering › Building and Construction › Building Energy and Comfort Optimization
- Keywords
- thawing, reversible heat pump, electric vehicles, CO2 working fluid, frost formation, throttle valve opening, Modelica simulation, transient simulation, range extension
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
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