Investigation on the performance coupling characteristics between a compound anti-frosting method and air source heat pump system
Investigation on the performance coupling characteristics between a compound anti-frosting method and air source heat pump system
复制标题
DOI：
10.1016/j.applthermaleng.2023.121430
复制
发表时间：
2023-08
影响因子：
6.4
通讯作者：
Ning Lyu;Hui He;Jian Liu;Caihua Liang;Xiaosong Zhang;F. Wang
中科院分区：
文献类型：
--
作者：
Ning Lyu;Hui He;Jian Liu;Caihua Liang;Xiaosong Zhang;F. Wang
空气源热泵系统在低温高湿工况下运行时容易结霜，导致运行稳定性和性能下降。传统的供热方式存在能耗高、供热中断、系统压力波动大等缺点。针对这些问题，提出了一种利用高速气流和超疏水改性协同作用的空气源热泵系统主动-被动复合防霜方法。为揭示防霜方法的能耗与系统性能之间的耦合特性，建立了基于液滴生长和受力的气流参数模型，开发了系统结霜和除霜的仿真算法，并在典型结霜工况下比较了系统在不同运行模式下的运行特性和性能。结果表明，主被动复合方式可实现无霜运行，降低防霜和除霜能耗90%以上。与未采取任何防霜措施的对照组相比，单次结霜期系统综合性能系数提高了9.7%~ 14.3%。活性方法的引入进一步增强了超疏水改性的抑霜效果。
Air source heat pump systems are prone to frosting when operating under low temperature and high humidity working conditions, leading to reduced operational stability and performance. The traditional defrosting methods suffer from defects including high energy consumption, heating interruption, and system pressure surges. To address these issues, a novel active–passive compound anti-frosting method for air source heat pump systems is introduced in this work, which involves utilizing the synergistic effect of high-speed airflow and superhydrophobic modification. To reveal the coupling characteristics between the energy consumption of the anti-frosting method and the system performance, the airflow parameter model based on droplet growth and force taken is established, the simulation algorithm for system frosting and defrosting is developed, and the system's operating characteristics and performance under different operation modes are compared within typical frosting condition. The results indicate that the active–passive compound method can realize frost-free operation and reduce the ant-frosting and defrosting energy consumption by more than 90%. Consequently, it improves the system's comprehensive performance coefficient in a single frosting-defrosting period by 9.7%∼14.3%, compared to the control group without any anti-frosting measures. The introduction of the active method further enhances the frost suppression effect of the superhydrophobic modification.