| 摘要: |
| 为研究送风温度对实际车用跨临界CO2制冷系统综合性能的影响，借助GT-Suite仿真软件，建立了单级跨临界CO2制冷系统的仿真模型。基于设计的三种工况，在风量设置上限的情况下对比了不同送风温度下系统的性能，提出了有效COPeff的概念并对此进行研究。结果表明：在其他工况相同的条件下，提高送风温度可以提高系统的COP、有效COPeff以及带风机功耗的有效COPeff,b；在低冷负荷工况下，考虑系统风机功耗后的综合性能COPb存在最优值为3.819，即系统存在对应的最优送风温度，但当负荷增大至一定水平时，最优送风温度不再存在。 |
| 关键词: 跨临界CO2制冷系统 送风温度 COP 系统性能 |
| DOI： |
| 投稿时间：2022-02-23 修订日期：2022-05-17
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| 基金项目:国家自然科学基金(52006162)资助项目 |
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| Simulation Study on the Effect of Supply Air Temperature on Vehicle Transcritical CO2 Refrigeration System |
|
Qiao Yiyou1, Fang Jianmin1, Yin Xiang1, Sun Xifeng1,2, Cao Feng1
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| (1.School of Energy and Power Engineering, Xi’an Jiaotong University;2.Technology Center of Dongfeng Motor Co., Ltd.) |
| Abstract: |
| To investigate the effect of supply air temperature on the comprehensive performance of a vehicle transcritical CO2 refrigeration system, a simulation model of a single-stage transcritical CO2 refrigeration system is established using the GT-Suite simulation software. Based on three designed operating conditions, system performances under different supply air temperatures are compared, the upper limit of the air volumetric flow rate is specified, and the concept of the effective coefficient of performance (COPeff) is proposed and analyzed. Under the same conditions, increasing the supply air temperature can improve the system coefficient of performance (COP), COPeff, and the effective COP with fan power consumption. Under low cooling load conditions, the optimal value of COPb is 3.819, implying that the air supply temperature is optimal. However, when the cooling load increases to a certain level, the optimal air supply temperature is no longer valid. The research presented herein guides the selection of the supply air temperature for vehicle transcritical CO2 refrigeration systems. |
| Key words: transcritical CO2 refrigeration system supply air temperature COP system performance |
