【摘要】 为了研究用于低温地板采暖的碳钢-水热虹吸管的传热性能,在不同的倾角(-4°-90°)、热水温度 (40-60℃)、热水流量(0．1-0．3 m3／h)、热水流向(顺流,逆流)以及蒸发段长度(30-180 mm)下进行了热管性能的实验,其中,蒸发段采用水加热,冷凝段采用风冷．实验结果显示,逆流条件下热管的性能明显优于顺流时;热管的传热功率和壁面温度随热水温度和流量的增加而持续增长,随倾角和蒸发段长度的增加而先增长后下降．在实验范围内热管运行良好,其最佳运行工况为倾角38°,热水温度60℃,热水流量0．3 m3／h,蒸发段长度120 mm且蒸发段热水逆流．更多还原

【Abstract】 To be applied to low-temperature under-floor heating system, the performance of a carbon-steel/water thermosyphon is studied. Experimental investigation has been done to find out the effect of inclination angle (-4°-90°) ,evaporative length(30 - 180 mm) , temperature(40-60 ℃) , flow rate(0. 1 -0.3 m3/h) and flow direction(forward flow, counter flow) of hot water on thermosyphon performance. The evaporator section of the carbon-steel tube is heated by hot water while its condenser section is cooled by air. Experimental results indicate that the thermosyphon performance with counter flow is much better than that with forward flow. The heat transfer rate and surface temperature of condenser section increase with the rise of hot water temperature and flow rate. With increasing inclination angle and evaporative length, heat transfer rate and surface temperature increase at first, and then start to decline after attaining their maxima. This thermosyphon works well in all experimental conditions, and it yields the highest thermal performance with the evaporative length of 120 mm, inclination angle of 38°, flow rate of 0. 3 m3/h, temperature of 60℃, and counter flow of heating water.更多还原