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1·In this article, with the analysis of several accidents of tubular heater used in heating net due to the poor maintenance during shut-down period, the correct maintenance methods were summarized.

通过对管壳式热网加热器由于停运时维护不当造成的几起事故进行分析，总结了若干热网加热器停运时的维护与保养方法，以供热电厂参考。

2·Instantaneous efficiency and daily average efficiency of evacuated tubular solar heater waters are contrasted with theoretical values by model of calculation and experimental data.

利用模型计算值和实验值对真空管式太阳热水器的瞬时效率、日平均效率进行了比较分析，结果表明所建立的计算模型总体上是成功的。

3·The vibration mechanism of tubular air heater is analyzed, the measures for refurbishment and design of air heater is put forward.

详细分析了管式空气预热器的振动机理，并从改造和设计两方面提出消除振动的措施。

4·Low and medium temperature heaters have wing shape heating elements and high temperature heater has tubular heating elements.

低、中温型加热器采用翅片式电热元件，高温加热器采用管状元件。

5·The configuration and thermal performance of the evacuated tubular solar water heater with an inserted heat pipe was studied in this paper.

本文针对玻璃真空管内插热管式太阳能集热器的结构特点、非稳态效率进行了研究。