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基于高低温分区热管网络的高轨通信卫星散热能力提升方法
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作者 金迪 韩崇巍 +4 位作者 任振岳 邢志芹 王小雅 孟莉莉 赵啟伟 《航天器环境工程》 CSCD 2024年第1期49-54,共6页
针对我国高轨通信卫星不断提升的散热需求,提出采用基于高低温分区热管网络的热设计方法。在分析热管网络散热能力的基础上,进行设备分区布局设计、分区热管网络散热面设计和分区热管网络布局设计。该方法可在保证卫星仪器设备工作温度... 针对我国高轨通信卫星不断提升的散热需求,提出采用基于高低温分区热管网络的热设计方法。在分析热管网络散热能力的基础上,进行设备分区布局设计、分区热管网络散热面设计和分区热管网络布局设计。该方法可在保证卫星仪器设备工作温度、不降低热设计可靠性、不增加分系统重量及功率需求的前提下,将卫星散热能力提升15%~20%。文章还结合近些年通信卫星研制中的经验和教训,归纳给出高低温分区热管网络设计中的注意事项,以期为相关工程设计提供有效指导。 展开更多
关键词 高轨通信卫星 热管网络 散热 高低温分区
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基于热管网络的近地圆轨道通信卫星热控技术 被引量:4
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作者 胡帼杰 刘百麟 +2 位作者 裴胜伟 钟时 姚延风 《工程热物理学报》 EI CAS CSCD 北大核心 2017年第6期1338-1343,共6页
大倾角近地圆轨道通信卫星外热流复杂多变,整星热耗大且对地面热流集中,因此其热控设计难度较大。本文以非箱式构型小卫星为对象,研究近地圆轨道通信卫星的热控技术。文中分析了大倾角近地圆轨道的外热流情况,各个舱板的外热流稳定性均... 大倾角近地圆轨道通信卫星外热流复杂多变,整星热耗大且对地面热流集中,因此其热控设计难度较大。本文以非箱式构型小卫星为对象,研究近地圆轨道通信卫星的热控技术。文中分析了大倾角近地圆轨道的外热流情况,各个舱板的外热流稳定性均较差,无法选取固定的散热面。本文提出了优化组合散热面并采用三维热管网络耦合散热面的热控技术,实现整星2200 W(对地面1500 W)的散热能力。文中利用热分析软件建立了整星的有限元模型,并对极端高低温工况进行了仿真分析,模拟结果表明上述热控技术可满足卫星散热需求。 展开更多
关键词 近地圆轨道通信卫星 外热流 热控技术 有限元分析 三维热管网络
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星载相控阵天线传热路径设计与热流分析
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作者 吴优 孔林 +1 位作者 孙强强 张济良 《北京航空航天大学学报》 EI CAS CSCD 北大核心 2023年第5期1127-1134,共8页
为满足星载相控阵天线多热源、高功耗、大功率密度散热问题,设计了由外敷热管和预埋热管组成的十字交叉热管网络,将点热源转化为面热源,同时借助U型热管耦合+Z板与±Y板,强化蜂窝板间换热,通过有限元模型对整星进行热流分析,并进行... 为满足星载相控阵天线多热源、高功耗、大功率密度散热问题,设计了由外敷热管和预埋热管组成的十字交叉热管网络,将点热源转化为面热源,同时借助U型热管耦合+Z板与±Y板,强化蜂窝板间换热,通过有限元模型对整星进行热流分析,并进行试验验证。仿真结果表明:U型热管传导了32.9%的相控阵天线热耗,其中66.6%传导至处于阴影区的+Y板,33.4%传导至处于阳照区的-Y板。试验结果表明:整星在长时峰值工作模式下,热管自身温差小于1℃,相控阵天线温度满足接口要求。热管网络满足整星长时峰值工作散热能力需求,多次十字交叉热管网络得到验证,U型热管耦合+Z板和±Y板,解决了单个蜂窝板散热能力不足问题。 展开更多
关键词 相控阵天线 热管网络 传热路径 有限元 热流分析
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Application of neural network in heating network leakage fault diagnosis 被引量:2
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作者 雷翠红 邹平华 《Journal of Southeast University(English Edition)》 EI CAS 2010年第2期173-176,共4页
In order to investigate the leak detection strategy of a heating network,a space-based simulation mathematical model for the heating network under leakage conditions is built by graph theory.The pressure changes of al... In order to investigate the leak detection strategy of a heating network,a space-based simulation mathematical model for the heating network under leakage conditions is built by graph theory.The pressure changes of all the nodes in the heating network are obtained from node leak and pipe leak conditions.Then,a leakage diagnosis system based on the back propagation(BP)neural network is established.This diagnosis system can predict the leakage pipe by collecting the pressure change data of the monitoring points,which can preliminary estimate the leak location.The usefulness of this system is proved by an example.The experimental results show that the forecast accuracy by this diagnosis system can reach 100%. 展开更多
关键词 heating network FAULT DIAGNOSIS artificial neural network
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低轨通信卫星箱式构型设计与散热能力分析
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作者 吴优 孔林 +1 位作者 孙强强 谭陆洋 《哈尔滨工业大学学报》 EI CAS CSCD 北大核心 2022年第12期87-94,共8页
为提高低轨通信卫星散热效率,降低卫星平台质量,通过分析卫星在轨飞行时各个蜂窝板外热流特点,提出一种以热管为传导网络的倒梯形延展板箱式构型。首先,根据低轨通信卫星在轨外热流积分平均值,通过数值计算得到各蜂窝板平均散热能力,并... 为提高低轨通信卫星散热效率,降低卫星平台质量,通过分析卫星在轨飞行时各个蜂窝板外热流特点,提出一种以热管为传导网络的倒梯形延展板箱式构型。首先,根据低轨通信卫星在轨外热流积分平均值,通过数值计算得到各蜂窝板平均散热能力,并对比两种箱式构型散热能力。其次,为保证各蜂窝板温度均匀,设计了由预埋热管和外敷热管组成的热管网络,强化蜂窝板内和蜂窝板间热耦合特性。最后,某型低轨通信卫星采用倒梯形延展板构型方案,并对卫星进行高低温热平衡试验验证。研究结果表明:在相同面积条件约束下,与正梯形构型相比,倒梯形延展板构型+X蜂窝板散热能力提升36.3%,-X蜂窝板散热能力提升36.4%,+Z蜂窝板散热能力提升10.2%,-Z蜂窝板散热能力提升98.6%,整星散热能力提升34.6%;热平衡试验结果表明,在高低温工况下所有设备满足温度指标要求,整星满足2 200 W热耗散热能力需求,其中+Z板相控阵天线峰值热耗为870W,证实了基于热管网络的倒梯形延展板箱式构型的可行性。 展开更多
关键词 低轨通信卫星 空间外热流 倒梯形构型 延展板 热管网络
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Fabrication and thermal performance of grooved-sintered wick heat pipe 被引量:3
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作者 蒋乐伦 汤勇 +2 位作者 武汇岳 周伟 蒋琳珍 《Journal of Central South University》 SCIE EI CAS 2014年第2期668-676,共9页
Some novel grooved-sintered composite wick heat pipes(GSHP) were developed for the electronic device cooling.The grooved-sintered wicks of GSHP were fabricated by the processes of oil-filled high-speed spin forming an... Some novel grooved-sintered composite wick heat pipes(GSHP) were developed for the electronic device cooling.The grooved-sintered wicks of GSHP were fabricated by the processes of oil-filled high-speed spin forming and solid state sintering.The wick could be divided into two parts for liquid capillary pumping flow:groove sintered zone and uniform sintered zone.Both of the thermal resistance network model and the maximum heat transfer capability model of GSHP were built.Compared with the theoretical values,the heat transfer limit and thermal resistance of GSHP were measured from three aspects:copper powder size,wick thickness and number of micro grooves.The results show that the wick thickness has the greatest effect on the thermal resistance of GSHP while the copper powder size has the most important influence on the heat transfer limit.Given certain copper powder size and wick thickness,the thermal resistance of GSHP can be the lowest when micro-groove number is about 55. 展开更多
关键词 WICK heat pipe electronics cooling thermal resistance heat transfer limit
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Synthesis of Heat Exchanger Network Considering Multipass Exchangers 被引量:3
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作者 李绍军 姚平经 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2001年第3期242-246,共5页
Many methods have been proposed for synthesis of heat exchanger networks in recent years, most of which consider single pass exchangers. In this study some evolutionary rules have been proposed for synthesis of multip... Many methods have been proposed for synthesis of heat exchanger networks in recent years, most of which consider single pass exchangers. In this study some evolutionary rules have been proposed for synthesis of multipass exchanger networks. The method is based on the heuristic that optimal networks should feature maximum energy recovery and have the minimum number of shells. The effectiveness of the developed evolutionary rules is demonstrated through some literature examples. 展开更多
关键词 heat exchanger network SYNTHESIS multipass exchanger heuristic rule
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Indirect heat integration across plants using hot water circles 被引量:3
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作者 常承林 王彧斐 冯霄 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第6期992-997,共6页
Total site heat integration(TSHI) provides more opportunities for energy saving in industry clusters. Some design methods including direct integration using process streams and indirect integration using intermediate-... Total site heat integration(TSHI) provides more opportunities for energy saving in industry clusters. Some design methods including direct integration using process streams and indirect integration using intermediate-fluid circuits, i.e., steam, dowtherms and hot water, have been proposed during last few decades. Indirect heat integration is preferred when the heat sources and sinks are separated in independent plants with rather long distance. This improves energy efficiency by adaption of intermediate fluid circle which acts as a utility provider for plants in a symbiotic network. However, there are some significant factors ignored in conventional TSHI, i.e. the investment of pipeline, cost of pumping and heat loss. These factors simultaneously determine the possibility and performance of heat integration. This work presents a new methodology for indirect heat integration in low temperature range using hot water circuit as intermediate-fluid medium. The new methodology enables the targeting of indirect heat integration across plants considering the factors mentioned earlier. An MINLP model with economic objective is established and solved. The optimization results give the mass flow rate of intermediate-fluid, diameter of pipeline, the temperature of the circuits and the matches of heat exchanger networks(HENS) automatically. Finally, the application of this proposed methodology is illustrated with a case study. 展开更多
关键词 Indirect integration Intermediate-fluid Across plants PIPELINE Optimization
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Determining heating pipe temperature in greenhouse using proportional integral plus feedforward control and radial basic function neural-networks 被引量:1
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作者 余朝刚 应义斌 +1 位作者 王剑平 杨佳 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第4期265-269,共5页
Proportional integral plus feedforward (PI+FF) control was proposed for identifying the pipe temperature in hot water heating greenhouse. To get satisfying control result, ten coefficients must be adjusted properly. T... Proportional integral plus feedforward (PI+FF) control was proposed for identifying the pipe temperature in hot water heating greenhouse. To get satisfying control result, ten coefficients must be adjusted properly. The data for training and testing the radial basic function (RBF) neural-networks model of greenhouse were collected in a 1028 m2 multi-span glasshouse. Based on this model, a method of coefficients adjustment is described in this article. 展开更多
关键词 PI control GREENHOUSE TEMPERATURE Neural networks
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Heat Transfer and Flow Analysis in Loop Heat Pipe with Multiple Evaporators Using Network Model
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作者 Shigeki Hirasawa Tsuyoshi Kawanami Katsuaki Shirai 《Journal of Mechanics Engineering and Automation》 2016年第7期319-325,共7页
Thermal performance of a loop heat pipe with two evaporators and two condensers was examined using a lumped network model analysis. Thermosyphon-type vertical loop heat pipe and capillary-pump-type horizontal loop hea... Thermal performance of a loop heat pipe with two evaporators and two condensers was examined using a lumped network model analysis. Thermosyphon-type vertical loop heat pipe and capillary-pump-type horizontal loop heat pipe were calculated by examining the change of heating rate of two evaporators. Calculation results showed that the vapor and liquid flow rates in the loop heat pipe and the thermal conductance of the heat pipe changed significantly depending on the distribution ratio of the heating rate of the multiple evaporators. The thermal performance of the vertical loop heat pipe with two evaporators was also examined and experimental results of flow direction and thermal conductance of the heat pipe agreed with the analytical results. The lumped network model analysis is therefore considered accurate and preferable for the practical design of a loop heat pipe with multiple evaporators. 展开更多
关键词 Loop heat pipe multiple evaporators thermal conductance network model analysis two phase flow.
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Prediction of Heat Transfer Rates for Shell-and-Tube Heat Exchangers by Artificial Neural Networks Approach 被引量:2
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作者 Qiuwang WANG Gongnan XIE Ming ZENG Laiqin LUO 《Journal of Thermal Science》 SCIE EI CAS CSCD 2006年第3期257-262,共6页
This work used artificial neural network(ANN)to predict the heat transfer rates of shell-and-tube heatexchangers with segmental baffles or continuous helical baffles,based on limited experimental data.The BackPropagat... This work used artificial neural network(ANN)to predict the heat transfer rates of shell-and-tube heatexchangers with segmental baffles or continuous helical baffles,based on limited experimental data.The BackPropagation (BP) algorithm was used in training the networks.Different network configurations were alsostudied.The deviation between the predicted results and experimental data was less than 2%.Comparison withcorrelation for prediction shows ANN superiority.It is recommended that ANN can be easily used to predict theperformances of thermal systems in engineering applications,especially to model heat exchangers for heattransfer analysis. 展开更多
关键词 heat transfer rate Artificial Neural Network shell-and-tube heat exchanger back propagation
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