Two high concentrating solar systems have been established with dish concentrator and plane-mirrors array concentrator. In the paper, the thermal performance has been experimentally studied with jet water cooling device and flat microchannel water-cooled device. The experimental results show that the maximum surface temperature difference of the dish concentrating system is greater than 20°C, while the plane-mirrors array system is lower than 4°C. It indicates that the plane-mirrors array concentrator has better uniformity. As the concentration ratio increases, the electrical efficiency of the concentrating photovoltaic system gradually decreases. When the concentration ratio is 200, the electrical efficiency of the photovoltaic system is 25%. The concentration ratio of 500 times or less is considered to be a suitable value, and then the electrical efficiency can still exceed 20%. It is found that the plane-mirrors array solar system is more suitable for the photovoltaic system than dish type system, which is only suitable for thermal power generation system. 本文提出并搭建了多碟共焦高倍聚光系统和平面镜阵列高倍聚光系统,突破了传统单碟聚光系统的不均匀性问题。多碟共焦系统采用喷射式水冷换热结构,而平面镜阵列系统采用微通道式换热结构。在户外实验测试过程中,通过红外热像仪和温度场分布研究表明多碟共焦系统表明温差超过20°C,而平面镜阵列系统表明温度不超过4°C。平面镜阵列系统的均匀性得到了很好的保障,能够适用于高倍聚光光伏热电联供系统,且系统电效率能达到25%,热效率高于45%;而多碟共焦系统虽然不适合高倍聚光光伏发电系统,但也可应用于高倍聚光热利用系统。
CHEN Haifei1; LI Guiqiang2
,
*; YANG Jie1; ZHANG Fuwei 1; LIANG Ming1; JI Jie3
,
*
. Experimental and Comparison Study on Two Solar Dish Systems with a High Concentration Ratio;太阳能高倍聚光多碟共焦系统的实验及对比研究[J]. 热科学学报, 2019
, 28(6)
: 1205
-1211
.
DOI: 10.1007/s11630-019-1104-x