A combined heat and power solar concentrating collector Joe Coventry Centre for Sustainable Energy...
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Transcript of A combined heat and power solar concentrating collector Joe Coventry Centre for Sustainable Energy...
![Page 1: A combined heat and power solar concentrating collector Joe Coventry Centre for Sustainable Energy Systems Australian National University.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e6c5503460f94b6ac5a/html5/thumbnails/1.jpg)
A combined heat and power solar concentrating collector
Joe Coventry
Centre for Sustainable Energy Systems
Australian National University
![Page 2: A combined heat and power solar concentrating collector Joe Coventry Centre for Sustainable Energy Systems Australian National University.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e6c5503460f94b6ac5a/html5/thumbnails/2.jpg)
The CHAPS collector
Combined Heat And Power Solar Collector
Generation of DC electricity AND Generation of hot water
Applications: • DHW, HHW and electricity• Commercial buildings• Light industrial buildings• Residential colleges
(eg. Bruce Hall 300m2 system)
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CHAPS system components
CHAPS troughs• 24 m long x 1.6 m wide rows• 37x geometric
concentration ratio• Modular system
Solar cells• 20% efficient under 30suns
and 25°C• Low series resistance• Manufactured at ANU
![Page 4: A combined heat and power solar concentrating collector Joe Coventry Centre for Sustainable Energy Systems Australian National University.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e6c5503460f94b6ac5a/html5/thumbnails/4.jpg)
CHAPS system componentsReceivers
• Aluminium extrusion• Series connected solar cells• Finned fluid conduit• Glasswool insulation• Anti-freeze, anti-corrosive heat
transfer fluid• Assembled at ANU
Mirrors• Glass-on-metal laminate mirrors• Silver backed mirror• Stamped tab ribs• Manufactured at ANU
![Page 5: A combined heat and power solar concentrating collector Joe Coventry Centre for Sustainable Energy Systems Australian National University.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e6c5503460f94b6ac5a/html5/thumbnails/5.jpg)
Efficiency tests
Measured on a custom built outdoor test rig at ANU with:• 1.25 m wide trough• 27 solar cell receiver• Steady state conditions• Maximum power point electrical load• Range of input temperatures• Constant low flow conditions
Efficiency results include:• Losses due to receiver shading• Losses due to hydraulic connections
![Page 6: A combined heat and power solar concentrating collector Joe Coventry Centre for Sustainable Energy Systems Australian National University.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e6c5503460f94b6ac5a/html5/thumbnails/6.jpg)
Efficiency Results
![Page 7: A combined heat and power solar concentrating collector Joe Coventry Centre for Sustainable Energy Systems Australian National University.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e6c5503460f94b6ac5a/html5/thumbnails/7.jpg)
Flux profile across a cell
Illumination profile• measured using videographic
flux mapping techniques• Peaks exceeding 100 suns• Significant temperature
variation across cells
![Page 8: A combined heat and power solar concentrating collector Joe Coventry Centre for Sustainable Energy Systems Australian National University.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649e6c5503460f94b6ac5a/html5/thumbnails/8.jpg)
Cells & Modules – testing
Range of cell and module tests• UV testing• High temperature testing• Humidity testing• Thermal cycling• On sun!
Challenges• Differential expansion• Corrosion• Water ingress
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Receiver design
Domestic system• Mechanical bond• Adhesives• Intermetalic bond• Electroplating
Commercial system• Closed circuit
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Attaching the cells
Thermal tape Alumina based substrates Anodising Plasma coating
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Interconnections
Tabs Tab connections• Braid• Shim• Spot welding
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Optical system
GOML mirror Low iron glass Silicone Textured cells
Electrical13%
Thermal63%
Reflection from cells7%
Insulation losses3%
Convection losses1%
Radiation losses1%
Reflection from receiver4%
Mirror shape error2%
Absorption in mirror6%
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Conclusions
Significant work on reliability, longevity CHAPS systems beginning to be commercialised