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本文依据JGT236—2008电采暖散热器标准中对于直接作用式电采暖散热器产品性能的Ⅲ级要求和金属热强度的要求.对不同结构尺寸的新型铝合金电散热器进行理论计算、试验验证,得到该新型铝合金电散热器最优的结构尺寸。 相似文献
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本文依据JGT236-2008电采暖散热器标准[1]中对于直接作用式电采暖散热器产品性能的III级要求和金属热强度的要求,对不同结构尺寸的新型铝合金电散热器进行理论计算、试验验证,得到该新型铝合金电散热器最优的结构尺寸. 相似文献
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采暖散热器的承压能力、金属热强度和水容量是重要的技术参数,既标志产品的性能也影响供暖系统的运行.通过对各类型散热器指标进行比较,分析研究了散热器的承压能力、金属热强度和水容量不同情况下对供暖系统的影响. 相似文献
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《青岛理工大学学报》2017,(6)
通过散热器热工性能试验台对钢管柱型散热器、灰铸铁柱翼型散热器、铜管铝翅片散热器、铜铝复合柱翼型散热器和铜管铝合金踢脚板散热器这5种采暖散热器进行测试试验,计算出各个散热器的金属热强度、标准计算温差下的散热量.利用最小二乘法回归出散热量与计算温差的关系式和曲线,并分析比较铜管铝合金踢脚板散热器和其他4种散热器的散热量和市场价格,以及5种散热器在安装和装饰上的优缺点,综合比较铜管铝合金踢脚板散热器和其他4种采暖散热器的性能.指出了不同指标下铜管铝合金踢脚板散热器和其他4种散热器相比的优缺点. 相似文献
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本文从理论上分析了自然对流方式下螺旋翅片管簇散热器的翅高、翅厚、管径、翅间距,罩高对散热器的热工性能的影响。利用已有的竖平板通道的自然对流换热公式,采用修正该公式中竖板高度的方法及光滑圆管自然对流换公式,给出了计算螺旋翅片管簇散热量的半理论计算方法,利用计算机分析了各因素对散热器换热量影响的程度;以金属热强度最大的优化目标,给出了该类型散热器的最佳结构参数族。 相似文献
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该标准是国内第一个供暖散热器产品的国标。标准中规定了铸铁散热器的结构形式,定义了普通铸铁散热器和内腔无砂铸铁散热器,明确了各类铸铁散热器的最小工作压力,用金属热强度作为铸铁散热器的热工指标。 相似文献
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散热器肋片的数值计算和结构优化 总被引:2,自引:0,他引:2
本文以金属热强度为结构优化的目标函数,利用Matlab对一种矩形肋片进行了散热数值计算;通过对计算结果的分析得出了该肋片的最件肋高尺寸。作者认为利用Matlab来解决这类肋片优化问题非常方便。 相似文献
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金属网对陶瓷板燃气红外辐射器性能的影响 总被引:8,自引:7,他引:1
在多孔陶瓷权燃气红外辐射器热平衡理论分析的基础上,通过一系列对比实验,得到出外加金属网对多孔陶瓷板燃气红外辐射器燃烧完全度及辐射效率的影响的规律。 相似文献
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Ulf Krüger 《Indoor air》1996,6(1):55-61
Abstract The near-zone of an air inlet device is the most critical part of a room as regards fulfilment of the thermal conform demands. An acceptable solution for residential buildings can be to supply the outdoor air through an air device placed behind a radiator. Such a device provides a mechanical exhaust system that supplies pre-heated outdoor air. Normally radiator air devices are located below a window and a window-sill. To examine the influence of a window-sill placed above an air device, several different positions and breadths of sills were tested. Air velocities and air temperatures were measured at distances within 0.50 m from the device. The measurements show that thermal comfort is strongly dependent on the location of the window-sill in relation to the air device. The degree of turbulence intensity affects the percentage of dissatisfied people due to draught. The velocity measurement system used in this study allows variation of the time constant of the system. When different time constants were used, the measured turbulence intensity varied considerably. Some measurements were carried out with the radiator switched off. In these cases different air velocities were measured, depending on the orientation of the sensors. This seems to be due to the temperature and velocity gradients at the measuring points. 相似文献
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分析了散热器的热工性能,给出了散热器的热工特性方程,论述了加设暖气罩后对散热器散热以及热计量的影响,提出了合理的暖气罩设置对节约能源的意义。 相似文献
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Performance of heat emitters in a room is affected by their interaction with the ventilation system. A radiator gives more heat output with increased air flow along its heat transferring surface, and with increased thermal difference to surrounding air. Radiator heat output and comfort temperatures in a small one-person office were studied using different positions for the ventilation air inlet. In two of the four test cases the air inlet was placed between radiator panels to form ventilation-radiator systems. Investigations were made by CFD (Computational Fluid Dynamics) simulations, and included visualisation of thermal comfort conditions, as well as radiator heat output comparisons. The room model was exhaust-ventilated, with an air exchange rate equal to what is recommended for Swedish offices (7 l s−1 per person) and cold infiltration air (−5 °C) typical of a winter day in Stockholm.Results showed that under these conditions ventilation-radiators were able to create a more stable thermal climate than the traditional radiator ventilation arrangements. In addition, when using ventilation-radiators the desired thermal climate could be achieved with a radiator surface temperature as much as 7.8 °C lower. It was concluded that in exhaust-ventilated office rooms, ventilation-radiators can provide energy and environmental savings. 相似文献
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本文对铜铝复合柱翼型散热器闭式空腔的传热情况进行理论研究,得到闭式空腔铝翼管各表面温度的数值解析解、闭式空腔内部和单柱散热器的散热量等。然后对常见的此类铜铝复合柱翼型散热器进行实验测试,将测试所得的闭式空腔和散热器散热量与理论计算结果进行分析,得出理论数值与实验数值相差均在5.77%以内,闭式空腔内的散热量与其当量直径的函数关系图和闭式空腔内散热量较大时其当量直径的范围;并提出了提高散热器的整体散热量,优化其闭式空腔的具体措施。 相似文献