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电动汽车二次节流CO2热泵空调系统性能实验研究
Experimental Study on the Performance of Secondary Throttling CO2 Heat Pump System for Electric Vehicles
- 制冷学报 2025年46卷第6期 页码：56-64
- 作者机构：
上海理工大学能源与动力工程学院 上海 200093
- 作者简介：
武卫东，男，教授，上海理工大学能源与动力工程学院，021-55271875，E-mail：usstwwd@163.com。研究方向：制冷及低温工程，汽车热管理。
- 基金信息：
DOI：10.12465/j.issn.0253-4339.2025.06.056
中图分类号： TB61+1;U469.72收稿：2024-07-07，
修回：2024-08-08，
录用：2024-09-26，
纸质出版：2025-12-16
- 稿件说明：
移动端阅览
陈浪, 武卫东, 王烽先, 等. 电动汽车二次节流CO2热泵空调系统性能实验研究[J]. 制冷学报, 2025,46(6):56-64.
Chen Lang, Wu Weidong, Wang Fengxian, et al. Experimental Study on the Performance of Secondary Throttling CO2 Heat Pump System for Electric Vehicles[J]. Journal of Refrigeration, 2025, 46(6): 56-64.
陈浪, 武卫东, 王烽先, 等. 电动汽车二次节流CO2热泵空调系统性能实验研究[J]. 制冷学报, 2025,46(6):56-64. DOI： 10.12465/j.issn.0253-4339.2025.06.056.
Chen Lang, Wu Weidong, Wang Fengxian, et al. Experimental Study on the Performance of Secondary Throttling CO2 Heat Pump System for Electric Vehicles[J]. Journal of Refrigeration, 2025, 46(6): 56-64. DOI： 10.12465/j.issn.0253-4339.2025.06.056.
摘要
为进一步提高CO
2
热泵系统性能，提出一种单级压缩二次节流串联气冷器的电动汽车CO
2
热泵空调系统。实验对比了二次节流系统与传统一次节流系统在不同环境温度条件下达到相同送风温度时的制热性能，并研究了在不同环境温度下系统制冷性能最优时的循环特性。结果表明：采用二次节流可有效降低CO
2
热泵系统能耗，提高系统COP，且环境温度越低，二次节流系统优势越明显；当系统送风温度为40 ℃、环境温度为-20 ℃时，二次节流系统功耗相比一次节流系统低256.1 W（降低15.4%），COP比一次节流系统高0.67（提高18.3%）。采用二次节流的CO
2
热泵空调系统，在-20 ℃的全新风环境下，系统送风温度为40 ℃时，制热COP为4.33；在43 ℃的全新风环境下，系统送风温度为23.6 ℃时，制冷COP可达到2.46，当室外环境温度超过35 ℃，系统制冷性能衰减较为显著。
Abstract
A CO
2
heat pump air-conditioning system with single-stage compression secondary throttling and a series gas cooler is proposed to enhance the performance of a CO
2
heat pump system. The heating performances of secondary and conventional throttling systems to achieve identical supply air temperatures under different ambient temperature conditions were compared experimentally
and the cycle characteristics when the cooling performance of the system was optimal at different ambient temperatures were investigated. The results showed that the implementation of a secondary throttling system could significantly reduce the energy consumption of the CO
2
heat pump system
thereby enhancing the system coefficient of performance (COP). Furthermore
the advantages of the secondary throttling system become more pronounced at lower ambient temperatures. Under conditions where the system supply air temperature was 40 ℃ and the ambient temperature was -20 ℃
the power consumption of the secondary throttling system was 256.1 W and 15.4% lower than that of the conventional throttling system
and its COP w
as 0.67 and 18.3% higher. Under a fresh air environment at -20 ℃
the CO
2
heat pump air conditioning system utilizing the secondary throttling could achieve a heating COP of up to 4.33 when the supply air temperature was 40 ℃. Under a fresh air environment at 43 ℃
the system could reach a cooling COP of 2.46 when the supply air temperature was 23.6 ℃. Additionally
it was observed that the cooling performance of the system significantly deteriorated when the ambient temperature exceeded 35 ℃.
关键词
Keywords
references
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