HIGH EFFICIENCY EVACUATED FLAT-PLATE SOLAR COLLECTOR FOR PROCESS STEAM PRODUCTION 1 Paper presented
HIGH EFFICIENCY EVACUATED FLAT-PLATE SOLAR COLLECTOR FOR PROCESS STEAM PRODUCTION 1 Paper presented
复制标题
用于工艺蒸汽生产的高效真空平板太阳能集热器 1 提交论文
DOI：
10.1016/s0038-092x(98)00122-4
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发表时间：
1999
期刊：
影响因子：
6.7
通讯作者：
T. Beikircher
中科院分区：
文献类型：
--
作者：
N. Benz;T. Beikircher
研制了一种用于工艺蒸汽生产的平板太阳能集热器。工作温度在100 ° C和150°C之间。沸腾集热器可用于工业过程供热和太阳能冷却应用。它作为一个具有受控液体流入的系统运行。已成功地抑制了内部蒸发器中两相流的不稳定性，并对系统的设计进行了研究。我们构建了一个原型收集器的基础上，商业上可用的真空平板收集器。为了在高达150°C的温度下实现高的热效率，吸收器的热损失已经通过使用超低发射选择性吸收器、在收集器外壳中的低压氪填充物（50 hPa）以及在吸收器和后侧之间的高反射铝箔而大大减少。原型集热器在我们的室外测试设施进行了动态测试，并显示出非常高的效率，在100°C蒸汽温度下超过60%，在150°C蒸汽温度（Tamb=15°C）下为45%。原型的操作行为始终是稳定的，蒸汽质量质量显示出接近100%的优良值。
A flat-plate solar collector for process steam production was developed. The operating temperatures are in the range between 100 and 150°C. The boiling collector can be used for process heat supply in the industry and for solar cooling applications as well. It operates as a system with controlled influx of liquid. Instabilities of the two-phase flow in the internal evaporator have been successfully suppressed and the design of the system has been investigated. We constructed a prototype collector based on a commercially available evacuated flat-plate collector. To realise high thermal efficiencies at temperatures up to 150°C, the thermal losses of the absorber have been drastically reduced using an ultra low emissive selective absorber, a low pressure krypton filling (50 hPa) in the collector casing, and a highly reflecting aluminium foil between absorber and rear side. The prototype collector was dynamically tested at our outdoor test facility and showed very high efficiencies of more than 60% at 100°C steam temperature and of 45% at 150°C steam temperature (Tamb=15°C). The operation behaviour of the prototype was always stable and the steam mass quality showed excellent values of nearly 100%.