Operation strategy and performance investigation of a high-efficiency multifunctional two-stage vapor compression heat pump air conditioning system for electric vehicles in severe cold regions

Ning, Qian; He, Guogeng; Xiong, Guohui; Sun, Wei; Song, Hai Sheng

doi:10.1016/j.seta.2021.101617

Cited by 7 publications

(3 citation statements)

References 43 publications

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“…Qian et al [106] proposed a high-efficiency multifunctional two-stage vapor compression (MTSC) heat pump air conditioning system for electric vehicles and its operation strategy, as depicted in Figure 11a. The system can operate in single-component vapor compression (SCC) cooling and heating modes, as well as activate the two-stage vapor compression (TSC) heating mode at −35 • C. Yu et al [107] proposed a dual evaporative temperature heat pump (DTHP) system, as shown in Figure 11b, to reduce the energy consumption of heating in an electric vehicle air conditioning system.…”

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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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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“…Chen et al [29] proposed an improved CO 2 heat pump system for electric vehicles by introducing the concept of two-stage compression with intermediate cooling and conducted experiments between the two-stage compression heat pump and the basic heat pump. The results showed that compared with the basic single-stage cycle system, the heating capacity and COP of the two-stage compression system were increased by 50-132% and 18.9-61.9%, respectively, as the ambient temperature decreased from 0 • C to −20 • C. Ning et al [30] proposed a multifunctional two-stage vapor compression heat pump air conditioning system with its operation strategies, which can operate not only in a single-stage vapor compression cooling and heating mode, but also in a two-stage vapor compression heating mode under ambient temperatures as low as −35 • C. According to the aforementioned literature, vapor injection technology can boost the heating/cooling capacity and the coefficient of performance (COP) of the refrigeration system, and it is especially suitable for applications on high-temperature heat pumps and low-temperature air conditioners [22,23]. However, for the chiller application, due to the low temperature rise, the injection pressure difference is low, and the injection port is also small because of the limited compressor surface.…”

Section: Introductionmentioning

confidence: 99%

“…results showed that compared with the basic single-stage cycle system, the heating capacity and COP of the two-stage compression system were increased by 50-132% and 18.9-61.9%, respectively, as the ambient temperature decreased from 0 °C to −20 °C. Ning et al [30] proposed a multifunctional two-stage vapor compression heat pump air conditioning system with its operation strategies, which can operate not only in a single-stage vapor compression cooling and heating mode, but also in a two-stage vapor compression heating mode under ambient temperatures as low as −35 °C. As mentioned above, vapor injection technology shows the potential to improve the chiller performance, and the small injection flowrate and large mixing loss limited its application for small-and medium-capacity chillers.…”

Section: Introductionmentioning

confidence: 99%

Development of Ultra-High-Efficiency Medium-Capacity Chillers with Two-Stage Compression and Interstage Vapor Injection Technologies

Zhang

Qiu

et al. 2022

Energies

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Chillers are widely used in commercial buildings for air conditioning, and their energy consumption is the main contribution to the building’s carbon emissions. Currently, the COPs of small- and medium-capacity screw chillers are still generally lower than 6.5, whereas large-capacity commercial centrifugal chillers have achieved an ultra-high energy-efficiency level of COP ≥ 7.0. To achieve an ultra-high energy efficiency of COP ≥ 6.5 in medium-capacity chillers, the authors developed a 200 RT screw chiller by adopting the technologies of two-stage compression and interstage vapor injection. The whole development process, including the design, simulation, analysis, and experiment, is presented in this paper. It was found that the two-stage compression technology could effectively boost the performance of the chiller’s compressor to a maximum volumetric and adiabatic efficiency of 99% and 80%, respectively. With the interstage vapor injection technology, the chiller’s cooling capacity and COP were increased by more than 11% and 8%, respectively. When the use of these two technologies was combined, the maximum COP of the chiller reached 7.17. Additionally, under these working conditions, the COP and integrated part-load value (IPLV) were 6.74 and 10.04, respectively. In all, the combination use of vapor injection and two-stage compression technologies shows great potential to improve the performance of chillers. The work and conclusions described here might provide an effective reference for the future development of high-efficiency small- and medium-capacity screw chillers.

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Thermodynamic performance of heat pump with R1234ze(E)/R1336mzz(E) binary refrigerant

Wang

Jiang

et al. 2023

Applied Thermal Engineering

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Operation strategy and performance investigation of a high-efficiency multifunctional two-stage vapor compression heat pump air conditioning system for electric vehicles in severe cold regions

Cited by 7 publications

References 43 publications

Review of Thermal Management Technology for Electric Vehicles

Review of Thermal Management Technology for Electric Vehicles

Development of Ultra-High-Efficiency Medium-Capacity Chillers with Two-Stage Compression and Interstage Vapor Injection Technologies

Thermodynamic performance of heat pump with R1234ze(E)/R1336mzz(E) binary refrigerant

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