Prototype design of a low-concentration roof-mounted solar thermal collector for industrial heat production

Ferrari, D, Dharmadhikari, N, Stanley, C, Blazley, L, Mojiri, A and Rosengarten, G 2016, 'Prototype design of a low-concentration roof-mounted solar thermal collector for industrial heat production', in R. Egan and R. Passey (ed.) Proceedings of the 2016 Asia Pacific Solar Research Conference, Canberra, Australia, 29 Novebmer - 2 Decemember 2016, pp. 1-12.


Document type: Conference Paper
Collection: Conference Papers

Title Prototype design of a low-concentration roof-mounted solar thermal collector for industrial heat production
Author(s) Ferrari, D
Dharmadhikari, N
Stanley, C
Blazley, L
Mojiri, A
Rosengarten, G
Year 2016
Conference name Asia Pacific Solar Research Conference 2016
Conference location Canberra, Australia
Conference dates 29 Novebmer - 2 Decemember 2016
Proceedings title Proceedings of the 2016 Asia Pacific Solar Research Conference
Editor(s) R. Egan and R. Passey
Publisher Australian Photovoltaic Institute
Place of publication Australia
Start page 1
End page 12
Total pages 12
Abstract Low- and medium-temperature industrial process heat demand represents a significant proportion of the total energy consumed within Australia. Currently, the overwhelming majority of this heat is generated via the combustion of natural gas, with a smaller contribution by electric resistance heating and heat pumps. In order to reduce fossil fuel consumption a renewable alternative process heat supply is highly desirable. Compound Parabolic Concentrators (CPCs) are low-optical-concentration non-imaging solar collectors which are capable of concentrating solar radiation over a broad range of acceptance angles. For this reason, CPCs lend themselves well to non-tracking, roof mounted applications for the generation of low- and medium-temperature thermal energy. The authors have presented a second paper describing an ab initio CPC design, however this presents a number of manufacturing challenges: precise geometric tolerances must be met in order to ensure high optical efficiency; a reflector substrate was required to meet the geometric specification while achieving a high-quality surface finish to maximize mirror reflectance; and a new evacuated tube absorber was developed to address the specific geometric and hydraulic needs. This paper presents the refinement of a CPC design for prototype manufacturability. Optical simulation is used to understand the sensitivity of the design to a range of manufacturing deviations, and this knowledge is applied to assess a number of candidate materials and manufacturing processes. Learnings from the prototype's development are considered in guiding the longer-term design for scale manufacturing. A prototype collector is currently in production and will be tested in the latter months of 2016 at the RMIT University solar test laboratory in Melbourne.
Subjects Energy Generation, Conversion and Storage Engineering
Renewable Power and Energy Systems Engineering (excl. Solar Cells)
Keyword(s) Solar
thermal
concentration
manufacturing
optics
ISBN 9780648041405
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