Optical and Thermal Characterization of Solar Receivers for Parabolic Trough Collectors

Mateu, Enric; Sánchez, Marcelino; Alonso, R.; Heras, Carlos; Perez, David; García, Pierre; Villuendas, F.

doi:10.18086/eurosun.2010.15.13

Cited by 2 publications

(1 citation statement)

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“…The test results in a single value accounting for all optical properties such as transmittance of glass, absorptance of the coating and bellow shield effects, but no thermal emittance of the coating. This test method is generally tested on the test benches under conditions of natural sunlight (outdoor) or in a unique linear solar simulator setup (indoor) [8]. For the outdoor test, the test bench is operated in the solar collector module double-axial tracking test platforms, by measuring the HTF flow and temperature difference between inlet and outlet to calculate the solar energy gain.…”

Section: Optical Efficiency Testmentioning

confidence: 99%

Performance and durability testing of parabolic trough receivers

Lei

Zhao

et al. 2017

AIP Conference Proceedings

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Selective solar absorber emittance measurement at elevated temperature AIP Conference Proceedings 1850, 130004 (2017) guominghuan@mail.iee.ac.cnAbstract. The paper describes the key performance and durability testing facilities of the parabolic trough receiver developed by Institute of Electrical Engineering, Chinese Academy of Sciences. The indoor heat loss test can be applied at 4-7 different temperature levels within 200-550 on receivers. The optical efficiency test bench consists of 12 metal halide lamps as the solar simulator and a 5 m length half-elliptical cylinder reflector with flat end reflectors. 3 ultraprecision temperature sensors are used in receiver each end to get the temperature difference. The residual gas analysis test bench is applied to analyze and predict the vacuum lifetime of the receiver. It can test the variations of composition and partial pressure of residual gases with temperature and time in the receiver annulus space by a high sensitivity quadrupole mass spectrometer gas analyzer. A coating accelerated ageing test bench, which is also used to test the thermal cycle, has been developed. This test bench uses the absorber tube of the recevier as the resistance heater to heat up the whole receiver. The coating lifetime can be predicted by the Arrhenius parameters. For the cycling test, the compressed air is used to directly cool the inner surface of the absorber tube. The thermal cycling test is performed with temperature cycles from 150 °C to 450 °C for 160 cycles. The maximum thermal cycling frequency is 8 cycles per day. The mechanical fatigue test bench is used to test the bellows and the glass-to-metal seals durability at the same time. Both bellows are expanded and compressed to 6.5 mm in turn with 10,000 cycles. A new rotating test bench was also developed to test the thermal efficiency of the receiver.

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Section: Optical Efficiency Testmentioning

confidence: 99%