应用相变储能板的星载数据处理器热设计

某星载数据处理器采用标准机箱结构，实现整星对地遥测数据的存储与传输的功能。数据处理器总热耗较大，其中有3个数据处理单元在工作时热耗高达70W。针对数据处理单元的周期性工作特点，填充有相变材料的储能板作为其散热措施使用。在数据处理单元工作时储热，间歇时散热，实现对数据处理单元的温度控制。为了验证该热设计措施的有效性，采用Flotherm软件进行仿真分析并设计了真空下的瞬态热平衡试验。仿真和试验结果均证明热设计方案合理，该相变储能板可以适应数据处理单元周期性工作的需求，且其内部所有元器件均满足一级降额设计要求。这种热设计方法为后续该类型周期性工作的大热耗单元热设计提供了参考意义。

Thermal design of a spaceborne data processor with phase change materials

The spaceborne data processor with the standard chassis can realize the storage and transmission of the telemetry data from the earth. The heat consumption of the data processor is extremely high and there are three 70W data processing units in the processor. An energy storage plate full of phase change materials was used to control the temperature of the processor. Phase change material could store heat when the unit was running and dissipate heat when the unit stopped running. The thermal design scheme proved functional through the simulation with the Flotherm software and the periodic thermal balance test. The energy storage plate could meet the requirements of the processor with periodic working and the temperatures of the electronic components were below the derating temperature. This study provides an feasible way for the thermal design of periodical running equipment with high heat dissipation.