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通过实验对阵列排布的内插管式真空管太阳空气集热系统在上海冬夏工况下的集热特性进行测试分析,同时考察太阳辐射、风量对其性能的影响,并分析此类空气集热器阵列布排流动阻力特性。研究发现,真空管太阳空气集热器串并联方式工作,在冬夏工况下均能获得良好的集热温度,冬季夏季集热温度分别可达87.8、109.3℃;平均集热效率为47.4%,单个集热器压降小于80 Pa,阵列集热器压降小于100 Pa。建立空气集热器串、并联模型,模拟结果显示,随集热器数量从2个增加到6个,串联的压降比并联的压降差值增大,从107.4 Pa增大到323.6 Pa,串联能获得较高的集热温度,但动力消耗增加,并联的集热温度不高,但动力消耗小。
Experiments were carried out to test and analyze the heat collecting characteristics of the arrayed tube vacuum tube solar air heat collecting system under the winter and summer conditions in Shanghai. At the same time, the influence of solar radiation and air volume on the performance of the solar air heating system was analyzed. Arrays array flow resistance characteristics. The results show that the vacuum tube solar air collectors work in series and parallel mode and get good temperature in summer and winter. The temperature in winter and winter is 87.8 and 109.3 ℃ respectively. The average heat collection efficiency is 47.4% The heater pressure drop is less than 80 Pa and the array collector pressure drop is less than 100 Pa. The simulation results show that with the increase of the number of collectors from 2 to 6, the pressure drop in series with the pressure drop increases in parallel from 107.4 Pa to 323.6 Pa, Series can get a higher collector temperature, but increased power consumption, parallel collector temperature is not high, but the power consumption is small.