In a space mission design, the goal of the thermal control subsystem is to ensure that all components of the satellite stay within their operating temperature ranges. The problem becomes more critical if the mission involves nanosatellites with an astrophysics payload requiring a dedicated thermal design to keep it at low temperature, as in the case of the High Energy Rapid Modular Ensemble of Satellites mission. Therefore, a thermal analysis is performed using ESATAN, one of the most-used software packages among those suggested by the European Cooperation for Space Standardization. This gives a good overview of the temperature fields, but many geometrical simplifications must be introduced in the model and all thermal interfaces must be checked. In order to assess the effect of the latter, the ESATAN results are cross checked with those obtained using another software, OpenFOAM, in which the geometry is created directly from the computer-aided-design model of the satellite, resulting in a very accurate geometrical representation. By first comparing the view factor calculations against analytical test cases, some issues emerged. These are thoroughly analyzed and discussed, and it is finally shown that they do not affect the temperature field. The high level of detail of OpenFOAM highlighted interesting possible improvements in the thermal configuration of the satellite.

在太空任务设计中，热控制子系统的目标是确保卫星的所有组件都保持在其工作温度范围内。如果任务涉及具有天体物理有效载荷的纳米卫星，而该任务需要专门的热设计以使其保持在低温状态，则问题将变得更加严重，就像在高能量快速模块化卫星组合任务中那样。因此，使用ESATAN进行热分析，ESATAN是欧洲空间标准化合作组织建议的最常用的软件包之一。这样可以很好地概述温度场，但是必须在模型中引入许多几何简化，并且必须检查所有热界面。为了评估后者的效果，ESATAN结果与使用另一软件OpenFOAM获得的结果进行了交叉检查，在该软件中，直接从卫星的计算机辅助设计模型创建了几何图形，从而获得了非常准确的几何图形。通过首先将视图因子计算与分析测试用例进行比较，出现了一些问题。对它们进行了彻底的分析和讨论，最后证明它们不影响温度场。OpenFOAM的高细节强调了卫星热配置方面有趣的可能改进。出现了一些问题。对它们进行了彻底的分析和讨论，最后证明它们不影响温度场。OpenFOAM的高细节强调了卫星热配置方面有趣的可能改进。出现了一些问题。对它们进行了彻底的分析和讨论，最后证明它们不影响温度场。OpenFOAM的高细节强调了卫星热配置方面有趣的可能改进。