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对内聚光膜式全玻璃真空太阳集热管进行了9组烘烤排气实验,通过对比各组集热管在烘烤排气过程中的排气量及分析高温烘烤———加速老化实验数据,得到了其烘烤排气最佳工艺参数。9组实验中,450℃/50 min,450℃/40 min,450℃/30 min及400℃/50 min四个工艺制作的集热管真空品质相差不多,优于其余五个工艺;单从集热管真空品质角度看,450℃/50min烘烤排气工艺最好,若从真空品质和制作成本两方面考虑,400℃/50 min是较好的工艺参数。
The coke film-type all-glass vacuum solar heat-collecting tube was subjected to 9 groups of baking exhaust experiments. By comparing the exhaust volume of each collecting tube during the baking exhausting process and analyzing the high-temperature baking-accelerated aging test Data, get the best exhaust baking process parameters. In the experiment of 9 groups, the vacuum quality of the heat-collecting tubes produced by four processes of 450 ℃ / 50 min, 450 ℃ / 40 min, 450 ℃ / 30 min and 400 ℃ / 50 min is almost the same, which is better than the other five processes; Heat pipe vacuum quality point of view, 450 ℃ / 50min baking exhaust the best, if from the vacuum quality and production costs of both considerations, 400 ℃ / 50min is a better process parameters.