Analysis of cyclic frosting and defrosting of a vehicle heat pump

Westhaeuser, Jochen; Schatz, H.; Albrecht, Jan-Christoph; Tegethoff, Wilhelm; Lemke, Nicholas; Koehler, Juergen

doi:10.1016/j.ijrefrig.2023.05.011

Cited by 4 publications

(1 citation statement)

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“…Additionally, it could operate efficiently for up to five hours under severe frost conditions, making it a viable solution for the air conditioning system of electric vehicles in environments ranging from −20 • C to 0 • C. Frosting of outdoor heat exchangers in heat pump systems during heating mode poses a challenge, as it increases both the airflow and thermal resistances of the heat exchangers, resulting in a significant reduction in the system's heating capacity [109]. Previous studies have identified various factors that contribute to the rate of frosting on the external heat exchanger, such as evaporating temperature, inlet air temperature, air velocity, and humidity [110][111][112][113][114][115]. Li et al [113] investigated the effect of refrigerant mass flow rate distribution on the frosting of the external heat exchanger and analyzed the ice bridge phenomenon's impact on the frosting rate.…”

Section: Research Progress On Heat Pump Air Conditioning Systemsmentioning

confidence: 99%

Review of Thermal Management Technology for Electric Vehicles

et al. 2023

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The burgeoning electric vehicle industry has become a crucial player in tackling environmental pollution and addressing oil scarcity. As these vehicles continue to advance, effective thermal management systems are essential to ensure battery safety, optimize energy utilization, and prolong vehicle lifespan. This paper presents an exhaustive review of diverse thermal management approaches at both the component and system levels, focusing on electric vehicle air conditioning systems, battery thermal management systems, and motor thermal management systems. In each subsystem, an advanced heat transfer process with phase change is recommended to dissipate the heat or directly cool the target. Moreover, the review suggested that a comprehensive integration of AC systems, battery thermal management systems, and motor thermal management systems is inevitable and is expected to maximize energy utilization efficiency. The challenges and limitations of existing thermal management systems, including system integration, control algorithms, performance balance, and cost estimation, are discussed, along with potential avenues for future research. This paper is expected to serve as a valuable reference for forthcoming research.

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