密闭环境换热装置设计及性能研究
2021-09-10陈彦
陈彦








摘要:为解决某高热耗密闭设备散热问题,设计一种高效气液散热装置,其内循环提供冷却风为设备内部电子器件散热,外循环冷却液为内循环风降温带走系统热量。通过计算确定换热器的流程、翅片数量、间距等参数,最终确定气液换热装置结构。针对设计的气液换热装置设计模拟热源实验,验证换热装置的热性能。实验结果与计算结果相吻合,表明该换热装置设计可行,符合技术要求,设计方法可为同类换热装置的设计提供参考和技术支撑。
Abstract: In order to solve the heat dissipation problem of a closed equipment with high heat consumption, an efficient gas-liquid heat exchange device was designed. The internal circulation provides cooling air for the heat dissipation of the electronic devices inside the equipment, and the external circulation coolant cools the system for the internal circulation air. The structure of the gas-liquid heat exchanger was determined by calculating the flow, the number of fins, the spacing and other parameters of the heat exchanger. The simulated heat source experiment is designed to verify the thermal performance of the designed gas-liquid heat exchanger. The experimental results are in agreement with the calculated results, indicating that the design of heat exchanger is feasible and meets the technical requirements. The design method can provide reference and technical support for the design of similar heat exchanger.
关键词:高热耗;密闭设备;气液换热装置;热性能
Key words: high heat consumption;airtight device;gas-liquid heat exchanger;thermal performance
中图分类号:TH136 文獻标识码:A 文章编号:1674-957X(2021)12-0079-03
0 引言
针对高温、高湿、高盐雾等恶劣使用环境,电子设备通常为密闭设计,且随着设备内电子器件的热耗越来越高,需要采用最实用、最优的冷却方式进行散热[1]。
目前国内密闭设备散热解决方案主要有自然散热、风机强迫风冷、风风热交换换热、风冷源换热、气液热交换换热等几种。其中,风机循环,直接在设备内装载风机扰动内部空气,将热量传导到设备壁面从而传导到外界环境,实现简单,但热阻大,效率低,对于较大功率电子器件冷却难以胜任。风冷源,通过风冷源直接给设备供设定温度、湿度的空气对电子设备进行冷却,但风冷源系统部件多,结构复杂,占用空间大,成本高,可靠性欠缺。风风热交换换热,设计一款换热装置,内循环风为设备内部器件冷却,外循环为外界环境风,给设备内循环风冷却。……
