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试验证明X50烘烤排气台的抽真空性能明显优于X35烘烤排气台的抽真空性能。在装载集热管加热烘烤结束时,X35排气台和X50排气台的高阀处的真空度接近相等,为2×10-3Pa;在真空管道端部处的真空度,X50排气台的真空度为5×10-3Pa,X35排气台的真空度为1.7×10-2Pa,明显差于高阀处。根据流导计算和试验结果分析,设计的真空太阳能集热管烘烤排气台的高真空系统,提高了装集热管真空管道边缘处的真空度,缩短了装集热管真空管道边缘处的空恢时间,提高了装集热管真空管道边缘处的极限真空度,并能应急处理抽气时集热管炸裂的情况,最终提高真空太阳能集热管的使用寿命。
The experiment shows that the evacuation performance of X50 bake exhaust station is better than the evacuation performance of X35 bake exhaust station. At the end of the heating cycle of the loaded collector tube, the vacuum at the high valve of the X35 exhaust station and the X50 exhaust station is approximately equal to 2 x 10-3 Pa; the degree of vacuum at the end of the vacuum line, X50 The degree of vacuum is 5 × 10 -3 Pa, and the degree of vacuum of the X35 exhaust stage is 1.7 × 10 -2 Pa, which is significantly worse than that of the high valve. According to the calculation and experimental results, the design of the vacuum solar collector bake exhaust system of high vacuum system to improve the vacuum tube collector vacuum tube installed at the edge of the vacuum, shortened to collect heat pipe vacuum pipe edge empty recovery Time, increase the vacuum tube collector vacuum tube installed at the limit of the vacuum level, and can deal with emergency evacuating tube burst, and ultimately improve the life of the vacuum solar collector.