In this paper a method is introduced to determine the area primarily contributing to heat transfer of spray and jet impingement cooling below boiling point. The setup is based on temperature measurement via an infrared camera. This camera is pointed at the back of a metal plate, whereas the nozzle is spraying from the front. This technique is especially suitable for heat transfer areas with different shapes, as it occurs with different nozzle types. The analysis of the heat transfer area uses a temperature criterion based on the second derivative of the temperature distribution. Using this method the heat transfer areas generated by a full cone nozzle, a hollow cone nozzle and a jet nozzle have been studied. The study focused on the influence of nozzle pressure, nozzle to target distance and nozzle inclination on the heat transfer area. The results show, that the heat transfer area generated by different nozzle types have similar behavior regarding nozzle pressure, but different behavior in terms of distance variation and nozzle inclination.

在本文中，介绍了一种方法来确定主要影响沸点以下的喷雾和射流冲击冷却的传热面积的方法。该设置基于通过红外摄像机进行的温度测量。摄像机对准金属板的背面，而喷嘴则从正面喷射。该技术特别适用于具有不同形状的传热区域，因为它发生在不同的喷嘴类型上。传热面积的分析使用基于温度分布的二阶导数的温度准则。使用这种方法，研究了由全锥形喷嘴，空心锥形喷嘴和喷射喷嘴产生的传热面积。该研究集中在喷嘴压力，喷嘴到目标距离和喷嘴倾斜度对传热面积的影响上。