摘要
对由镜面反射为主但是存在一定漫反射的复合抛物面聚光器 (CPC)反射面构成的集热器 ,在存在太阳散射情况下进行了光吸收性能的分析 ,比前人只考虑集热器镜面反射和太阳光直射更加接近实际情况。方法是在利用光线追踪法对CPC反射面的镜面反射进行分析的基础上 ,结合辐射度算法定量计算了CPC反射面的漫反射和太阳光的散射分量对集热器的光学性能的直接影响。并通过CPC集热器瞬时效率测试验证了理论的正确性。通过该理论 ,可以在更接近实际的情况下对CPC集热器进行光学设计和计算 。
An optical analysis for a solar collector with a compound parabolic concentrator (CPC) reflector which is made of a majority of specular constituent and a minority of diffuse constituent in the case that diffuse solar radiation exists is reported in this paper. The methods deal with not only the direct solar radiation but also the diffuse solar radiation, which is more close to the reality. On the basis of the ray-tracing algorithm, which is used to treat the specular case, radiance algorithm is taken to calculate the contribution of the diffuse constituent of the CPC reflector and the diffuse solar radiation to the optical performance of the collector quantitatively. An experiment on CPC's instantaneous efficiency was carried and it validated the theory. This theory can be used to calculate and design the CPC collector.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2003年第1期58-63,共6页
Acta Energiae Solaris Sinica
