流体回路用于控制航天器系统中敏感部件的温度，以确保它们能够正常工作。 虽然有几种热控制方法（如被动隔热、热电装置、相变材料、热管和短期放电系统），但流体回路有特定的应用领域。 第13部分详细描述了航天器中使用的流体回路系统。购买本文件时可获得的所有当前修订均包含在购买本文件中。

Fluid loops are used to control the temperature of sensitive components in spacecraft systems in order to ensure that they can function correctly. While there are several methods for thermal control (such as passive thermal insulations, thermoelectric devices, phase change materials, heat pipes and short-term discharge systems), fluid loops have a specific application area. This Part 13 provides a detailed description of fluid loop systems for use in spacecraft.All current amendments available at time of purchase are included with the purchase of this document.