Design and indoor testing of a compact optical concentrator

Abstract. We propose and analyze designs for stationary and compact optical concentrators. The designs are based on a catadioptric assembly with a linear focus line. They have a focal distance of around 10 to 15 cm with a concentration ratio (4.5 to 5.9 times). The concentrator employs an internal linear-tracking mechanism, making it suitable for rooftop solar applications. The optical performance of the collector has been simulated with ray tracing software (Zemax), and laser-based indoor experiments were carried out to validate this model. The results show that the system is capable of achieving an average optical efficiency of around 66% to 69% during the middle 6 (sunniest) h of the day. The design process and principles described in this work will help enable a new class of rooftop solar thermal concentrators.

[1]  Robert A. Taylor,et al.  Analysis of a New Compound Parabolic Concentrator-Based Solar Collector Designed for Methanol Reforming , 2014 .

[2]  H. Solangib,et al.  A review on global solar energy policy , 2011 .

[3]  Maria Cristina Munari Probst,et al.  Towards an improved architectural quality of building integrated solar thermal systems (BIST) , 2007 .

[4]  Li Yang,et al.  Performance analysis of a novel sun-tracking CPC heat pipe evacuated tubular collector , 2015 .

[5]  S. C. Kaushik,et al.  Advancement in solar photovoltaic/thermal (PV/T) hybrid collector technology , 2012 .

[6]  Robert A. Taylor,et al.  Thermal analysis of a micro solar thermal collector designed for methanol reforming , 2015 .

[7]  Gary Rosengarten,et al.  Thermal performance of a novel rooftop solar micro-concentrating collector , 2012 .

[8]  Takao Kashiwagi,et al.  DESIGN OF A NONIMAGING FRESNEL LENS FOR SOLAR CONCENTRATORS 1 1 Paper presented at the ISES Solar Wo , 1999 .

[9]  Robert A. Taylor,et al.  Experimental investigation of a nanofluid absorber employed in a low-profile, concentrated solar thermal collector , 2015, SPIE Micro + Nano Materials, Devices, and Applications.

[10]  Graham L. Morrison,et al.  Theoretical analysis of a novel, portable, CPC-based solar thermal collector for methanol reforming , 2014 .

[11]  Ari Rabl,et al.  Comparison of solar concentrators , 1975 .

[12]  Robert A. Taylor,et al.  Nanofluid-based optical filter optimization for PV/T systems , 2012, Light: Science & Applications.

[13]  Xingxing Zhang,et al.  Review of R&D progress and practical application of the solar photovoltaic/thermal (PV/T) technologies. , 2012 .

[14]  Robert A. Taylor,et al.  Beam Splitting System for the Development of a Concentrating Linear Fresnel Solar Hybrid PV/T Collector , 2013 .

[15]  R. Winston.  Light Collection within the Framework of Geometrical Optics , 1970 .

[16]  Frank Buttinger,et al.  Development of a new flat stationary evacuated CPC-collector for process heat applications , 2010 .

[17]  Luis Pérez-Lombard,et al.  A review on buildings energy consumption information , 2008 .

[18]  Cheng Zheng,et al.  A new optical concentrator design and analysis for rooftop solar applications , 2015, SPIE Optical Engineering + Applications.

[19]  Robert A. Taylor,et al.  Energy concentration limits in solar thermal heating applications , 2016 .

[20]  Roberto Fedrizzi,et al.  Demonstration of three large scale solar process heat applications with different solar thermal collector technologies , 2012 .

[21]  Robert A. Taylor,et al.  Desing and on-sun testing of a hybrid PVT prototype using a nanofluid-based selective absorption filter , 2015, 2015 12th International Conference on the European Energy Market (EEM).

[22]  Jose Colina–Márquez,et al.  Modeling of direct solar radiation in a compound parabolic collector (CPC) with the ray tracing technique , 2010 .

[23]  Elizabeth Thomsen,et al.  Spectral beam splitting for efficient conversion of solar energy - A review , 2013 .

[24]  Daniel Chemisana,et al.  Building Integrated Concentrating Photovoltaics: A review , 2011 .

[25]  Ruzhu Wang,et al.  Experimental investigation and analysis on a concentrating solar collector using linear Fresnel lens , 2010 .