用于电动汽车的喷气涡旋式压缩机的一维模型改进和实验验证

IF 3.5 2区 工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-09-11 DOI:10.1016/j.ijrefrig.2024.09.007
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引用次数: 0

摘要

喷气技术是提高电动汽车热泵系统效率的一条极具前景的途径,尤其是在寒冷的环境条件下。虽然通常采用简化的等熵过程来评估喷气涡旋式压缩机(SCVI)的热力学功能,但它与实际运行动态存在很大差异。本研究引入了一个复杂的一维数学模型,其中包含了内部泄漏和热损失等关键因素,从而更准确地反映了 SCVI 的实际运行情况。研究包括对短包覆型 SCVI 的全面性能评估,重点关注低温环境条件,并辅以严格的实验验证。与非喷射方案的对比分析表明,该方案的性能显著提高,包括质量流量最大提高 17.2%,加热能力提高 10.5%,加热 COP 提高 2.15%。简化等熵过程计算模型和增强型一维数学模型都用于分析压缩机的运行。将内部泄漏和热损失因素考虑在内,大大缩小了加热能力和排气温度的计算结果与实验结果之间的差距,将差异从近 20% 减少到仅 4%。这一改进后的数学模型与实验数据高度吻合,在评估压缩机的实际运行动态时,精确度在 5% 以内。
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Refined one-dimensional modeling and experimental validation of scroll compressor with vapor injection for electric vehicles
Vapor injection technology represents a highly promising avenue for enhancing the efficiency of heat pump systems within electric vehicles, especially in challenging cold ambient conditions. Although a simplified isentropic process is commonly employed to assess the thermodynamic functioning of scroll compressors with vapor injection (SCVI), it diverges significantly from actual operational dynamics. This study introduces a sophisticated 1D mathematical model that incorporates key factors such as internal leakage and thermal losses, thereby providing a more accurate representation of SCVI's operational realities. The research includes comprehensive performance evaluations of a short wrap profile SCVI, with a specific focus on low-temperature ambient conditions, supported by rigorous experimental validation. Comparative analyses against non-injection scenarios reveal notable enhancements, including a maximum 17.2 % increase in mass flow, a 10.5 % rise in heating capacity, and a 2.15 % improvement in heating COP. Both the simplified isentropic process calculation model and the enhanced 1D mathematical model are utilized to analyze compressor operations. The integration of internal leakage and heat loss considerations significantly narrows the gap between calculated and experimental results for heating capacity and discharge temperature, reducing discrepancies from nearly 20 % to a mere 4 %. This refined mathematical model demonstrates a high level of alignment with experimental data, achieving an accuracy within 5 % when assessing the compressor's real-world operational dynamics.
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来源期刊
CiteScore
7.30
自引率
12.80%
发文量
363
审稿时长
3.7 months
期刊介绍: The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.
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