Understanding condensation of CO₂ is essential for e.g designing compact heat exchangers or processes involved in Carbon Capture and Storage. However, a consistent experimental campaign for condensation of CO₂ on common materials is lacking. In this work, we present an experimental method and an associated laboratory setup for measuring the heat transfer properties of CO₂ condensation on materials commonly used in heat exchangers for the liquefaction of CO₂. We have investigated the heat transfer during CO₂ condensation on copper, aluminum, stainless steel (316) to reveal the heat transfer dependency on surface properties. The experiments are conducted at three saturation pressures, 10, 15, and 20 bar and at substrate subcooling between 0 and 5k. The results show that the heat transfer coefficients decrease with increasing surface subcooling. It was also found that increasing the saturation pressure increases the heat transfer coefficient. The results indicate that surface roughness and surface energy affect the condensation heat transfer coefficient, and an increased roughness results in reduced heat transfer coefficients. The highest heat transfer coefficient is found for condensation on copper, for which the lowest surface roughness has been measured.

了解 CO _{2 的} 冷凝对于设计紧凑型热交换器或涉及碳捕获和储存的过程至关重要。然而，缺乏在普通材料上冷凝 CO ₂ 的一致实验活动。在这项工作中，我们提出的实验方法和相关联的实验室装置，用于测量CO的热传递特性₂ 上在换热器通常用于CO的液化物料缩合₂。我们研究了 CO ₂过程中的传热 铜、铝、不锈钢 (316) 上的冷凝，以揭示传热对表面特性的依赖性。实验在 10、15 和 20 巴这三个饱和压力下以及在 0 到 5k 之间的基板过冷度下进行。结果表明，传热系数随着表面过冷度的增加而降低。还发现增加饱和压力会增加传热系数。结果表明，表面粗糙度和表面能影响冷凝传热系数，粗糙度增加导致传热系数降低。发现最高的传热系数发生在铜上的冷凝，其表面粗糙度最低。