本文给出了平板太阳能集热器在稳态和非稳态热虹吸条件下的热性能实验结果。稳态热效率与新的集热器效率广义公式（Al Tamimi和Clark 1983）相比表现良好。其结果是一个广义的散热系数，可应用于任何平板太阳能集热器，无论其由单相或沸腾流体冷却。实验结果包括冷却剂通道中的完全（饱和入口）和部分（过冷入口）沸腾。 在非沸腾收集器的情况下，该公式与Hottel-Whillier-Bliss（HWB）方程相同。因此，HWB方程被认为是广义结果的极限形式。含有沸腾流体的收集器的热效率本质上大于具有相同热参数a值的非沸腾收集器（见术语）。此外，沸腾集热器代表一类太阳能集热器，其热效率比任何其他类型的集热器更接近理论最大值。本文给出的实验数据是在R- 11自然阳光下的带电沸腾收集器。包括实验时间响应数据。这项研究的结果被用于帮助开发新的沸腾收集器ASHRAE测试标准。引文:研讨会论文，佐治亚州亚特兰大，1984年

The experimental thermal performance of a flat-plate solar collector containing a boiling fluid is given for steady and unsteady thermosiphon operation. The steady-state thermal efficiency is shown to compare favorably with a new generalized formulation for collector efficiency (Al-Tamimi and Clark 1983). The result is a generalized heat-removal factor that may be applied to any flat-plate solar collector whether it is cooled by a single-phase or a boiling fluid. The experimental results include both full (saturated inlet) and partial (subcooled inlet) boiling in the coolant channel. In the case of a nonboiling collector, this formulation becomes identical to the Hottel-Whillier-Bliss (HWB) equation. Accordingly, the HWB equation is found to be a limiting form of a generalized result.Collectors containing a boiling fluid have a thermal efficiency that is inherently greater than a nonboiling collector having the same value of the thermal parameter a (see nomenclature). Further, a boiling collector represents a class of solar collectors whose thermal efficiency approaches the theoretical maximum more closely than any other class of collector. The experimental data presented in this paper are taken on an R-11 charged boiling collector in natural sunlight. Experimental time response data are included.The results of this research were used to help develop a new ASHRAE test standard for boiling collectors.