High concentration parabolic trough solar collector with novel secondary reflector in the vacuum receiver

摘要

In this research work, the performance of novel secondary concentrator in the vacuum receiver of the parabolic troughcollector is investigated. The secondary concentrator is designed, the optical and thermal performance analysis is doneanalytically and validated numerically by using Finite Element Analysis based computational software. From the initialoptical and thermal modeling, it is found that the use of secondary reflector gives the concentration of 53X against theconcentration in 20’s X of conventional trough collectors, the optical efficiency of 75% and the thermal efficiency of 60%at 650oC. After the design and analysis, the secondary concentrator is formed to the shape and photogrammetry techniqueis adopted to validate the optical simulations. In future work, the secondary concentrator and selective coated absorberwill be produced and will be packaged inside the vacuum receiver. The installation, testing and commissioning of the fullsystem two-stage concentration parabolic trough collector with novel secondary concentrator will be performed atUniversity of California Merced in 2020.