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将普通全玻璃真空管太阳集热器和简化结构的CPC(compound parabolic concentrator)相结合,并在玻璃真空管内管中安装套管结构换热器,设计出一种新型廉价的高温太阳能水蒸气集热系统。研究系统由60个单元串联而成,每个单元主要由简化式CPC、双层玻璃真空集热管、换热套管3部分组成。实验以高压水作为传热工质,研究天气条件、设计条件和蒸汽压力等对系统性能的影响。实验结果表明:该系统能够获得压力超过0.40 MPa、温度接近200℃的饱和水蒸气和过热水蒸气,系统最大功率达到9 k W,最大集热温度下的集热效率超过30%。
The common all-glass vacuum tube solar collector and the simplified structure of the CPC (compound parabolic concentrator) combination, and the glass tube vacuum tube installed in the tube structure of the heat exchanger to design a new low-cost high-temperature solar water vapor collector system. The research system consists of 60 units connected in series. Each unit is mainly composed of simplified CPC, double-layer glass vacuum tube and heat-exchange tube. The experiment uses high-pressure water as the heat transfer medium to study the influence of the weather conditions, design conditions and steam pressure on the system performance. The experimental results show that the system can get saturated steam and superheated steam with the pressure exceeding 0.40 MPa and the temperature approaching 200 ℃. The maximum power of the system reaches 9 kW and the heat collecting efficiency under the maximum collector temperature exceeds 30%.