【摘要】 我国北方地区冬季气温较低，采用传统空气源系统供暖效率较低，且在严寒天气无法正常运行，因此提出将跨临界CO₂空气源热泵用于严寒地区冬季采暖与夏季制冷。环境温度的变化对跨临界CO₂空气源热泵系统性能的影响较大，为了研究严寒地区跨临界二氧化碳空气源热泵系统的运行特性，利用TRNSYS模拟仿真软件，对供暖季建筑物室内外温度、供回水温度、COP等关键参数进行了测试分析。结果表明：供暖初期与中期的平均供、回水温度受室外环境温度影响差距较大，但其供暖期与供冷期的逐时供、回水温度波动不大，由此说明跨临界CO₂空气源热泵系统在寒冷地区应用时的供暖及供冷效果较好。更多还原

【Abstract】 The winter temperature in the northern regions of China is relatively low, and the heating efficiency of traditional air source systems is low, and it cannot operate normally in severe cold weather. So it is proposed to use trans-critical CO₂ air source heat pumps for winter heating and summer cooling in severe cold areas. The change of ambient temperature has a great impact on the performance of the trans-critical CO₂ air source heat pump system. In order to study the operating characteristics of the trans-critical CO₂ air source heat pump system in cold regions, TRNSYS simulation software is used to test and analyze key parameters such as indoor and outdoor temperature, water supply and return temperature, COP and so on. The results show that there is a large difference between the average supply and return water temperature affected by outdoor environmental temperature in the early and middle heating period. However, there is little fluctuation in the hourly supply and return water temperatures during the heating and cooling periods, indicating that the trans-critical CO₂ air source heat pump system has fairly good heating and cooling effects when applied in severe cold regions.更多还原