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Driving range evaluation based on different cabin thermal management goals of CO2 heat pumps for electric vehicles

Citation

Wang, A and Yin, X and Jia, F and Cao, F and Liu, Y and Wang, X, Driving range evaluation based on different cabin thermal management goals of CO2 heat pumps for electric vehicles, The Journal of Cleaner Production, 382 Article 135201. ISSN 0959-6526 (2023) [Refereed Article]


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DOI: doi:10.1016/j.jclepro.2022.135201

Abstract

Improving driving range is very important for electric vehicles (EVs). The use of CO2 heat pumps to replace Positive Temperature Coefficient (PTC) heaters for cabin heating is one of the most efficient choices for improving driving range in EVs. The combination of CO2 heat pumps and electric vehicles matches well with the social requirements of low-carbon, cleaner production, and sustainable development. However, heat pumps may frost under a conventional optimal discharge pressure control, resulting in a rapid drop in driving range. To solve this problem, the impact of frost on the driving range under different ambient conditions was assessed, and the failure of performance guarantee under conventional control in frost-prone conditions was deeply studied. Based on the experimental data, a heating capacity decline map was developed, and a new global performance improvement control method was proposed. Moreover, the dynamic characteristics between optimal discharge pressure control and the new control process were experimentally compared. Furthermore, a comparative analysis of driving range improvement under the global performance improvement control was carried out in three cities with typical climates. The results indicated that driving range improvement of the new method could be even as high as 10% in some conditions. Finally, the global performance improvement control method was recommended in regions with low ambient temperatures and high humidity.

Item Details

Item Type:Refereed Article
Keywords:electric vehicle, driving range, CO2, heat pump, heating efficiency improvement, cabin thermal management goals
Research Division:Engineering
Research Group:Mechanical engineering
Research Field:Energy generation, conversion and storage (excl. chemical and electrical)
Objective Division:Energy
Objective Group:Energy storage, distribution and supply
Objective Field:Energy systems and analysis
UTAS Author:Wang, X (Professor Xiaolin Wang)
ID Code:154404
Year Published:2023
Deposited By:Engineering
Deposited On:2022-11-28
Last Modified:2023-01-16
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