The test results indicate that the heat transfer rates of the test coils increase with air inlet velocity and fin numbers 由实验数据得知湿盘管总热传量中,潜热量的变化占了大部分。
4.
The overall thermal transmission value ( ottv ) , which is directly related to the energy consumption within a building , is 20 . 9 wm 而天台的园林设计则有助隔热,影响能源消耗的楼宇总热转移值只有每平方米20
5.
By testing , the total thermal of the microchannel heatsink for cooling high power semiconductor diode laser arrays is 0 . 645 / w , which is consistent with the result of theory counting 通过测试,所制得的无氧铜微通道热沉冷却半导体激光器的总热阻为0 . 645 ~ 0c w ,与理论分析基本吻合,满足散热要求。
6.
According to the theory , the reciprocal of the thermal insulation of partial wet fabric equal to the sum of reciprocal of wetted part and unwetted part , and these were agreed with experimental values 通过理论得知,局部润湿织物的总热阻的倒数等于润湿部分和未润湿部分热阻倒数之和,这与实测结果吻合较好。
7.
Analyzing of the heat transfer in microchannel heat sinks , finite element method is used to calculate the surface temperature , fluid temperature and the total thermal resistance of microchannel heat sinks with arbitrary base heat flux distribution 在对微管道散热器进行传热分析时,本文利用有限元法在微管道底壁热量任意分布的情况下,计算了微管道的壁面温度和流体温度分布,最终得到了总热阻值。
8.
The optimum inclination angle is between 15 ~ 20 , the length of thermosyphon will not change the phase - change heat transfer coefficient of the evaporation section and the condensation , which will enlarge heat transfer area of thermosyphon and increase the heat exchange capacity . the head - on speed of wind only stranger the heat transfer of the evaporation section and the condensation section . the experiment shows that the mathematic model closely fits to the thermosyphon , moreover , the one key to resolve the thermosyphon effect lies in decreasing the thermoresistance of evaporating section and condensation section . this study can provide directions and experience in the future research 倾斜角越大,热虹吸管总热阻越大,最佳倾角在15 20之间;充液率过多或过少都会对传热性能产生不利影响,对于本实验采用的1 . 75m 、 2m 、 2 . 5m 、 3m热虹吸管,最佳充液率在20 % 35 %之间;管长对传热也有影响,管长不改变热虹吸管蒸发段和冷凝段的换热系数,只增加了热虹吸管的换热面积,增大换热量;迎面风速的大小,起到强化热虹吸管蒸发段和冷凝段换热的目的。
9.
When power is 20w , working substance is r123 , the surface temperature is below 35 ; when power is 200w , the surface temperature of electron compound is below 70 , the total thermal resistance is 0 . 285 / w , which exhibits this compound heat pipe great applicability for long - range heat power 当热流量为20w小发热量时,工质使用r123 ,可以使电子器件的表面温度控制在35以下;在热流量达到200w的时候,使电子器件的表面温度控制在70以下,总热阻为0 . 285 / w ,表现了该热管散热器对大范围热流量很好的适用性。