| 摘要: |
| 为研究冷藏/冷冻车辆用10 kW制冷机组不同参数对性能的影响，本文采用实验和模拟方法分析了制冷循环系统的制冷能力、COP和压力性能，并通过分别改变制冷剂充注量、过热度和制冷剂种类对其进行了实验和模拟研究。结果表明：随着制冷剂充注量和过热度的变化，制冷机组的制冷能力和COP表现出不同的趋势。模拟值和实验值的制冷能力和COP误差分别为6.4%和8.5%，所有结果均在10%以内。与制冷剂充注量相比，制冷机组的性能变化更多地依赖于过热度的变化。在制冷循环在过热度为4 ℃、制冷剂充注量为7.4 kg时，制冷机组的制冷能力和COP最佳。通过数值模拟分析了应用于制冷循环系统的制冷剂R449A，比R404A的COP高约4%。确认了制冷剂R449A可以替代R404A使用。 |
| 关键词: 冷藏车 制冷机组 制冷能力 过热度 COP R449A |
| DOI： |
| 投稿时间：2022-12-19 修订日期：2023-03-01
录用日期：2023-04-19 |
| 基金项目:国家自然科学基金（52075047）,山东省重点研发计划项目（2018GNC112003）和博士科研启动基金(2019Y39)项目资助。 |
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| Experimental and Numerical Investigation of a Refrigerator Unit for a Refrigerated Vehicle |
| Wang Zhenhuan,Choi Younsung,Wang Shanshan |
| (College of Electromechanical Engineering, Binzhou University;Korea Refrigeration and Air-conditioning Assessment Center) |
| Abstract: |
| To examine the influence of different parameters of a 10 kW refrigeration unit on the performance of a refrigerated vehicle, the capacity, coefficient of performance (COP), and pressure performance of the circulation system of a refrigeration unit were tested using experimental and simulation methods. Additionally, changes were made to the refrigerant charge, degree of superheating, and refrigerant type to conduct experimental and simulation studies. The results showed that the capacity and COP of the refrigeration unit exhibited different trends with changes in the refrigerant charge and superheat. The cooling capacity and COP errors between simulation and experiment were 6.4% and 8.5%, respectively, and the error of all results was within 10%. It was confirmed that the performance variation in the refrigeration unit was more sensitive to the variation in the degree of superheating than to the refrigerant charge. The best capacity and COP were achieved when the degree of superheat was 4 ℃ and the refrigerant charge was 7.4 kg. Furthermore, through numerical simulation, it was determined that the COP performance of the refrigerant R449A, used in the refrigeration cycle system, was approximately 4% higher than that of R404A. It was confirmed that the refrigerant R449A can be used instead of R404A. |
| Key words: refrigerated vehicle refrigeration unit cooling capacity degree of superheat COP R449A |
