换热器盘管结霜是制冷领域的一个常见挑战，随着技术的发展和寒冷气候的考虑，结霜在热泵领域变得越来越重要。霜冻会阻碍气流并增加热阻，从而降低热交换器的性能，从而使系统负担过重，消耗更多能量以满足温度设定值。因此，热泵系统具有除霜循环，这涉及到消耗额外能量以融化盘管上阻碍运行的霜冻/冰层的系统。解决霜冻减少和/或缓解问题是开发高效热泵的关键，从而使其得以广泛采用。 本文提出了一种测试三种换热器盘管设计的系统方法，以分别评估多种空气湿度条件下翅片类型和密度之间的结霜影响。铝翅片库存样品由各种涂层供应商进行涂层，以进行初步测试。这涉及（a）冰粘附试验，以测量从表面移除冰所需的最大剪切力；和（b）项？循环腐蚀试验（CCT-4标准），定期测量接触角，以表征涂层在真实环境中的耐久性。？然后选择涂层A和涂层B在测试回路中进行全面的霜层发展评估。 当时换热器盘管是相同的吗？使用A涂层（超级）疏水产品和B涂层（防冰产品）进行涂层和测试。空侧压降和结霜时间？是用于性能退化评估的主要指标。结果表明，两种涂层都显著降低了性能退化？因为霜冻。引文:2021篇虚拟会议论文

Frost development in heat exchanger coils is a common challenge in refrigeration and becoming increasingly important in heat pumps as technology is evolving and considered for cold climate. Frost reduces heat exchanger performance by impeding airflow and adding thermal resistance, therefore taxing the system, consuming more energy to satisfy temperature setpoints. Accordingly, heat pump systems have defrost cycles, which involve systems that consume extra energy to melt away the impeding frost/ice layer on coils. Tackling frost reduction and/or mitigation is key for developing high-efficiency heat pumps, further enabling their widespread adoption. This paper presents a systematic approach for testing three heat exchanger coil designs to evaluate the impact of frost among fin types and densities separately, under multiple air moisture conditions. Aluminum fin stock samples were coated by a variety of coating vendors for preliminary testing. This involved (a) an ice adhesion test to measure the maximum amount of shear force required to remove ice from the surface; and (b)?cyclic corrosion testing (CCT-4 standard) with periodic contact angle measurements to characterize durability of coatings in real-world environments.?Coating A and Coating B were then chosen for a comprehensive frost development assessment in a testing loop. Identical heat exchanger coils were then?coated and tested with Coating A, a (super)hydrophobic product and Coating B, an icephobic product. Airside pressure drop and frost development time?were the main metrics used for performance degradation assessment. The results showed that both coatings significantly reduced the performance degradation?due to frost.