A novel free-form Cassegrain concentrator for PV/T combining utilization

Abstract The conventional imaging solar concentrators normally obtain a Gaussian distribution on the receiving surface. The aperture size of a thermal receiver (TR) is always limited primarily to the high concentration area, discarding the edge part to be lost. The current study proposes a novel free-form Cassegrain concentrator (FFCC) for PV/T combining utilization. The remaining heat flux by the edge of focal spot is directed by the secondary mirror for electric generation. The profile of secondary reflector is constructed by the geometric construction method (GCM), aiming at achieving high concentration for the TR and uniform flux distribution for the PV receiver (PVR). The energy transmission characteristics of FFCC, including the incident vectors and heat flux distribution on the TR/PVR are both investigated. The effects of changing the receiving locations, PV/T dividing ratio, etc. are analyzed. The sun size/solar conic angular is also considered for practical use. The GCM method and simulation results in this article can provide a reference for the PV/T solar energy system and free form surface design.

[1]  Richard P. Paul,et al.  Robot manipulators : mathematics, programming, and control : the computer control of robot manipulators , 1981 .

[2]  Tin-Tai Chow,et al.  A Review on Photovoltaic/Thermal Hybrid Solar Technology , 2010, Renewable Energy.

[3]  Harald Ries,et al.  Tailored freeform optical surfaces. , 2002, Journal of the Optical Society of America. A, Optics, image science, and vision.

[4]  Tracy K. N. Sweet,et al.  A novel absorptive/reflective solar concentrator for heat and electricity generation: an optical and thermal analysis , 2016 .

[5]  Wang Fuqiang,et al.  Parabolic trough receiver with corrugated tube for improving heat transfer and thermal deformation characteristics , 2016 .

[6]  Xu Liu,et al.  Freeform LED lens for uniform illumination. , 2008, Optics express.

[7]  G. Johnston.  Focal region measurements of the 20 m2 tiled dish at the Australian National University , 1998 .

[8]  Fengzhou Fang,et al.  Design and manufacture of off-axis optical reflective integrator with faceted structure , 2012 .

[9]  Juan C. Miñano,et al.  The Future of Illumination Design , 2007 .

[10]  Juan Carlos Miñano,et al.  Photovoltaic performance of the dome-shaped Fresnel-Köhler concentrator , 2012, Other Conferences.

[11]  Fei Chen,et al.  Design method of high-efficient 
LED headlamp lens. , 2010, Optics express.

[12]  Chung-Yu Tsai,et al.  Improved irradiance distribution on high concentration solar cell using free-form concentrator , 2015 .

[13]  Jannick P Rolland,et al.  Fast freeform reflector generation usingsource-target maps. , 2010, Optics express.

[14]  L. P. Bulat,et al.  Thermal-photovoltaic solar hybrid system for efficient solar energy conversion , 2006 .

[15]  Abraham Kribus,et al.  A Multistage Solar Receiver , 1999 .

[16]  Chuang Sun,et al.  Numerical investigation of the solar concentrating characteristics of 3D CPC and CPC-DC , 2011 .

[17]  Florian Fournier,et al.  Freeform Reflector Design With Extended Sources , 2010 .

[18]  Harald Ries,et al.  New high-flux two-stage optical designs for parabolic solar concentrators , 1993 .

[19]  Julio Chaves,et al.  Review of SMS design methods and real-world applications , 2004, SPIE Optics + Photonics.

[20]  Y. Shuai,et al.  Experimental and numerical investigation on solar concentrating characteristics of a sixteen-dish concentrator , 2012 .

[21]  Chuang Sun,et al.  Adjustment, error analysis and modular strategy for Space Solar Power Station , 2014 .

[22]  Chuang Sun,et al.  Optimal design of symmetrical two-stage flat reflected concentrator , 2013 .

[23]  Wang Fuqiang,et al.  Thermochemical performance analysis of solar driven CO2 methane reforming , 2015 .

[24]  Yongtian Wang,et al.  Free form optical system design with differential equations , 2010, SPIE/COS Photonics Asia.

[25]  H. Tan,et al.  Radiation performance of dish solar concentrator/cavity receiver systems , 2008 .

[26]  T. Mallick,et al.  Coupled heat transfer performance of a high temperature cup shaped porous absorber , 2016 .

[27]  Zexin Feng,et al.  Design of LED freeform optical system for road lighting with high luminance/illuminance ratio. , 2010, Optics express.

[28]  H Ries,et al.  Tailored edge-ray concentrators as ideal second stages for Fresnel reflectors. , 1993, Applied optics.

[29]  Juan C. Miñano,et al.  Free-form optics for illumination , 2009 .

[30]  A. Cvetkovic,et al.  The XR nonimaging photovoltaic concentrator , 2007, SPIE Optical Engineering + Applications.

[31]  Yong Shuai,et al.  Thermal performance analysis of porous media receiver with concentrated solar irradiation , 2013 .