A study of a low pressure ratio vapor injection scroll compressor for electric vehicles under low ambient conditions

Zhang, Xinxin; Li, Kang

doi:10.1016/j.ijrefrig.2021.08.022

Cited by 19 publications

(4 citation statements)

References 30 publications

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“…Kim et al [75] compared and analyzed the impact of liquid refrigerants, vapor refrigerants, and two-phase mixed refrigerants on the performance of scroll compressors, and they found that the two-phase mixed refrigerant, at exhaust temperatures of −5 °C, exhibits the highest COP and injection capability, suggesting that it can maximize system efficiency and performance under specific conditions. Zhang et al [76,77] proposed a lower- Jung et al [72] optimized the angle of the SCVI injection port by using the COP as the evaluation index. The supplemental injection ports were positioned at 320°, 360°, 400°, and 440°, as depicted in Figure 10.…”

Section: Research On Vapor-injection Scroll Compressormentioning

confidence: 99%

“…Kim et al [75] compared and analyzed the impact of liquid refrigerants, vapor refrigerants, and two-phase mixed refrigerants on the performance of scroll compressors, and they found that the two-phase mixed refrigerant, at exhaust temperatures of −5 °C, exhibits the highest COP and injection capability, suggesting that it can maximize system efficiency and performance under specific conditions. Zhang et al [76,77] proposed a lower- To address the decline in performance of the EV-HPAC system in low-temperature regions, Kwon et al [73] proposed an HPAC system with an SCVI. Fernando et al [74] conducted a comparative analysis between an SCVI and a two-stage scroll compressor (TSSC).…”

Section: Research On Vapor-injection Scroll Compressormentioning

confidence: 99%

“…Kim et al [75] compared and analyzed the impact of liquid refrigerants, vapor refrigerants, and twophase mixed refrigerants on the performance of scroll compressors, and they found that the two-phase mixed refrigerant, at exhaust temperatures of −5 • C, exhibits the highest COP and injection capability, suggesting that it can maximize system efficiency and performance under specific conditions. Zhang et al [76,77] proposed a lower-compression-ratio SCVI, as illustrated in Figure 11. This study indicated that at higher compressor speeds, the system heating performance is improved as the injection pressure increases and the scroll compressor discharge port temperature decreases.…”

Section: Research On Vapor-injection Scroll Compressormentioning

confidence: 99%

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Key Technologies and Application of Electric Scroll Compressors: A Review

Zhang,

Peng,

Zhang

et al. 2024

Energies

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The electric scroll compressor is driven by a built-in electric motor that rotates the scroll disk. It is known for its simple structure, adjustability, and high efficiency, making it highly promising for various applications. This paper reviews the current application and research status of electric scroll compressors. It covers topics such as the optimal design of scroll compressor profiles, scroll disk leakage sealing, and computer simulation optimization design methods. Additionally, the progress and development trends of vapor-injection scroll compressors (SCVIs) are discussed. This paper also presents the latest research progress on the application of the new refrigerant CO2 in electric scroll compressors, along with its latest applications that align with sustainable development requirements. Finally, this paper concludes with recommendations for the application of electric scroll compressors and suggests future directions for research.

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Section: Research On Vapor-injection Scroll Compressormentioning

confidence: 99%

“…Kim et al [75] compared and analyzed the impact of liquid refrigerants, vapor refrigerants, and two-phase mixed refrigerants on the performance of scroll compressors, and they found that the two-phase mixed refrigerant, at exhaust temperatures of −5 °C, exhibits the highest COP and injection capability, suggesting that it can maximize system efficiency and performance under specific conditions. Zhang et al [76,77] proposed a lower- To address the decline in performance of the EV-HPAC system in low-temperature regions, Kwon et al [73] proposed an HPAC system with an SCVI. Fernando et al [74] conducted a comparative analysis between an SCVI and a two-stage scroll compressor (TSSC).…”

Section: Research On Vapor-injection Scroll Compressormentioning

confidence: 99%

Section: Research On Vapor-injection Scroll Compressormentioning

confidence: 99%

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Key Technologies and Application of Electric Scroll Compressors: A Review

Zhang,

Peng,

Zhang

et al. 2024

Energies

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“…As a typical vapor compression refrigeration system, chiller efficiency could be potentially improved by adopting vapor injection technology [12][13][14]. Figure 1 shows the typical vapor injection system.…”

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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