为研究内插热管太阳能真空集热管(solar vacuum collector tube with an inserted heat pipe,SVCTIHP)内部各部件及界面改变与传热效果间关系,指导结构和工艺优化,提高SVHCTIHP性能,建立了SVHCTIHP内部热量传递的数学模型。利用MATLAB...为研究内插热管太阳能真空集热管(solar vacuum collector tube with an inserted heat pipe,SVCTIHP)内部各部件及界面改变与传热效果间关系,指导结构和工艺优化,提高SVHCTIHP性能,建立了SVHCTIHP内部热量传递的数学模型。利用MATLAB软件对型号为Z-Bj/0.6-WF-1.5/16-58的SVCTIHP的动态响应特征进行模拟分析和实验验证。对热量在SVCTIHP内部传递过程中各主要环节的热损失随结构、材料参数的变化规律进行了模拟,分析了提高SVCTIHP集热性能的途径,发现热管与翅片的接触热阻对SVCTIHP集热效率的影响大。利用新型导热胶对热管与翅片的接触部位进行了填充性黏结并进行了实验测试。结果表明:工艺改进后,该型热管冷凝出口端温度提高了37.8℃,集热效率提高12%。展开更多
Multiple loop heat pipe is a high-functional thermal transport device. This work was conducted to confirm the working performance of Multiple loop heat pipe under thermal vacuum ambience with the working fluid ammonia...Multiple loop heat pipe is a high-functional thermal transport device. This work was conducted to confirm the working performance of Multiple loop heat pipe under thermal vacuum ambience with the working fluid ammonia. Asmall multiple loop heat pipe with two evaporators and two ra- diators was designed and fabricated. Then thermal vacuum test was conducted. The heaters were fasten on both evaporators, both radiators, both compensation chambers. In the case that both evaporators were heated, the multiple loop heat pipe can transport 120/120 W for 1.5 m, in the case that only one evaporator was heated, evaporator 1 can transport 80 W for 1.5 m, while eva- porator 2 can transport 120 W for 1.5 m. Two flow regulators were installed near the confluence of liquid line to prevent uncondensed vapor penetrating into returning liquid when the tempera- ture difference exists between two radiators. In the case that the heat load at both evaporators were 40/40 W and one radiator was heated, the flow regulator1 can tolerate the 160 W of heat load which was supplied to radiator1 while the flow regulator2 can tolerate the 100 W of heat load which was supplied to radiator2. To demonstrate the multiple loop heat pipe’s startup behavior at lowheat load, each of the compensation chamber was preheated to change the initial distribution of liquid and vapor in the evaporator and compensation chamber, in the result, each evaporator can start up at 5W through preheating.展开更多
文摘为研究内插热管太阳能真空集热管(solar vacuum collector tube with an inserted heat pipe,SVCTIHP)内部各部件及界面改变与传热效果间关系,指导结构和工艺优化,提高SVHCTIHP性能,建立了SVHCTIHP内部热量传递的数学模型。利用MATLAB软件对型号为Z-Bj/0.6-WF-1.5/16-58的SVCTIHP的动态响应特征进行模拟分析和实验验证。对热量在SVCTIHP内部传递过程中各主要环节的热损失随结构、材料参数的变化规律进行了模拟,分析了提高SVCTIHP集热性能的途径,发现热管与翅片的接触热阻对SVCTIHP集热效率的影响大。利用新型导热胶对热管与翅片的接触部位进行了填充性黏结并进行了实验测试。结果表明:工艺改进后,该型热管冷凝出口端温度提高了37.8℃,集热效率提高12%。
文摘Multiple loop heat pipe is a high-functional thermal transport device. This work was conducted to confirm the working performance of Multiple loop heat pipe under thermal vacuum ambience with the working fluid ammonia. Asmall multiple loop heat pipe with two evaporators and two ra- diators was designed and fabricated. Then thermal vacuum test was conducted. The heaters were fasten on both evaporators, both radiators, both compensation chambers. In the case that both evaporators were heated, the multiple loop heat pipe can transport 120/120 W for 1.5 m, in the case that only one evaporator was heated, evaporator 1 can transport 80 W for 1.5 m, while eva- porator 2 can transport 120 W for 1.5 m. Two flow regulators were installed near the confluence of liquid line to prevent uncondensed vapor penetrating into returning liquid when the tempera- ture difference exists between two radiators. In the case that the heat load at both evaporators were 40/40 W and one radiator was heated, the flow regulator1 can tolerate the 160 W of heat load which was supplied to radiator1 while the flow regulator2 can tolerate the 100 W of heat load which was supplied to radiator2. To demonstrate the multiple loop heat pipe’s startup behavior at lowheat load, each of the compensation chamber was preheated to change the initial distribution of liquid and vapor in the evaporator and compensation chamber, in the result, each evaporator can start up at 5W through preheating.
