TY - GEN
T1 - On-grid performance of REhnu's 8-mirror CPV-T tracker
AU - Stalcup, Thomas
AU - Angel, Roger
AU - Geary, Andrew
AU - Sodari, Frank
AU - Rademacher, Matt
AU - Whiteside, Andy
AU - Will, John
AU - Didato, Nick
AU - Strittmatter, Peter
N1 - Publisher Copyright:
© 2017 Author(s).
PY - 2017/9/6
Y1 - 2017/9/6
N2 - REhnu has built and tested two 6 kW CPV-T trackers using dish-receiver architecture. In these trackers, only the light collection elements are large, namely mirrors on dual axis trackers. The inherently small parts, the multijunction cells, are packaged in a small, inexpensive receiver at each mirror focus. Optics in the receiver apportion the intensely focused sunlight equally to many cells, for high optical efficiency and simplified manufacture. Heat is removed by recirculated liquid. The tracker carries eight 2.7 m2 mirrors and receivers. The CSTC DC efficiency of the individual mirror receiver units is measured at 32.5%. When used for electrical generation alone, the tracker system delivers an AC electrical output of 6.27 kW to the grid, referenced to a solar flux of 1 kW/m2 DNI and 20°C ambient temperature, corresponding to a total CSOC system efficiency of 29.1%, matching the best grid-connected system efficiency reported for any CPV system4. When used to generate also a thermal output of 9 kW at 64°C, the electrical efficiency of the tracker was reduced by 0.8%, while the total efficiency, thermal plus electrical, rose to 77%.
AB - REhnu has built and tested two 6 kW CPV-T trackers using dish-receiver architecture. In these trackers, only the light collection elements are large, namely mirrors on dual axis trackers. The inherently small parts, the multijunction cells, are packaged in a small, inexpensive receiver at each mirror focus. Optics in the receiver apportion the intensely focused sunlight equally to many cells, for high optical efficiency and simplified manufacture. Heat is removed by recirculated liquid. The tracker carries eight 2.7 m2 mirrors and receivers. The CSTC DC efficiency of the individual mirror receiver units is measured at 32.5%. When used for electrical generation alone, the tracker system delivers an AC electrical output of 6.27 kW to the grid, referenced to a solar flux of 1 kW/m2 DNI and 20°C ambient temperature, corresponding to a total CSOC system efficiency of 29.1%, matching the best grid-connected system efficiency reported for any CPV system4. When used to generate also a thermal output of 9 kW at 64°C, the electrical efficiency of the tracker was reduced by 0.8%, while the total efficiency, thermal plus electrical, rose to 77%.
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U2 - 10.1063/1.5001411
DO - 10.1063/1.5001411
M3 - Conference contribution
AN - SCOPUS:85029582949
T3 - AIP Conference Proceedings
BT - 13th International Conference on Concentrator Photovoltaic Systems, CPV 2017
A2 - Rey-Stolle, Ignacio
A2 - Siefer, Gerald
A2 - Hinzer, Karin
PB - American Institute of Physics Inc.
T2 - 13th International Conference on Concentrator Photovoltaic Systems, CPV 2017
Y2 - 1 May 2017 through 3 May 2017
ER -