中文摘要：

对一种分仓真空管太阳能热水器在晴天和多云天两种典型天气条件下进行了实验测试与分析,并与常规真空管太阳能热水器测试对比.结果显示无论是在晴天还是在多云天气下,分仓真空管太阳能热水器三个仓在当天运行条件下温度分层都比常规真空管太阳能热水器的明显,顶部和中部水温相差不大,但与底部水温相差较大.每个仓底部存在冷水区,但高温仓内的较明显.夜间温降期间,低温仓温度分层最严重,高温仓底部水温有明显的先升温后平缓的趋势.

英文摘要：

In this paper,an experimental study has been carried out to examine the operating characteristic of a trichotomous vacuum tube water heater,which has three separate water tanks,under typical sunny and cloudy weather condition,which is also compared to that of a regular solar water heater.The results show that the temperature stratification of in the trichotomous solar water heater is stronger than that in the regular solar water heater,no matter it was under the sunny or cloudy weather conditions.In the trichotomous vacuum solar water heater,the temperature difference between the top and the middle is small,but there is a large temperature difference between the top and the bottom.In each water tank,there is a cold water zone in the bottom region,which is particularly evident in the high temperature water tank.During the nighttime cooling period,the temperature stratification in the low temperature water tank in the trichotomous solar water heater is the strongest,while in the bottom region of the high temperature water tank,the water temperature has the trend to rise initially but gradually become stable subsequently.