Innovative technology solutions for
sustainability
Innovative technology solutions for
sustainability
ABENGOA SOLAR
1
Port...
2
Mini Incus: introduction
How does a receiver tube work?
ρ
τ
Transmittance (τ)
Absorptance (α=1-ρ)
Outer borosilicate gla...
3
Mini Incus: introduction
Why is it necessary to evaluate the receiver?
It makes more difficult for the light to come int...
4
Mini Incus: description
 Portable device. Light-weight, reduced size, compact and
ergonomic.
 Transmittance and reflec...
5
Mini Incus: description
 Reflectance and transmittance are measured at 14 different wavelengths:
Expanded uncertainty U...
6
Mini Incus: commercial application
Statistical evaluation of a 100 MW parabolic trough plant takes 2 hours
Application t...
Innovative Technology Solutions for
Sustainability
Thanl
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Portable spectrophotometer Mini Incus

Evaluation of the receiver tubes in the solar field. Receivers are a key element in the solar field of parabolic trough plants because the conversion of solar radiation into thermal energy takes place within them.
Published on: Mar 4, 2016
Published in: Technology      
Source: www.slideshare.net


Transcripts - Portable spectrophotometer Mini Incus

  • 1. Innovative technology solutions for sustainability Innovative technology solutions for sustainability ABENGOA SOLAR 1 Portable spectrophotometer Mini Incus Allowing for the evaluation of receiver tubes in the field
  • 2. 2 Mini Incus: introduction How does a receiver tube work? ρ τ Transmittance (τ) Absorptance (α=1-ρ) Outer borosilicate glass Inner absorber tube coating  Parameters defining the efficiency of this conversion are The receiver is a key component in the solar field of parabolic trough plants, since there is where the conversion from solar radiation to useful thermal energy takes place. transmittance reflectance Receiver tube optical efficiency
  • 3. 3 Mini Incus: introduction Why is it necessary to evaluate the receiver? It makes more difficult for the light to come into the receiver. It may result in a reduction of absorptance of a considerable amount of solar energy  The receiver may accumulate grime on its glass outer tube  Degradation of the absorber coating might also occur These parameters have a direct impact on production: Electricity production of the solar plant Being able to measure these parameters would allow for:  Optimizing the production  Daily evaluation of receiver tube performance  Optimal design of cleaning program, including establishment of frequency  Enhancing the plant production models  Keeping track of the guarantee from receiver providers Transmittance decreases Absorptance decreases
  • 4. 4 Mini Incus: description  Portable device. Light-weight, reduced size, compact and ergonomic.  Transmittance and reflectance measured at a time at each measurement.  Two Optical channels. One for transmittance and another for reflectance.  Quick. A measurement takes only 40 seconds. Abengoa has developed a unique and innovative solution  Use it day or night. Not affected by external light.  Autonomy. Up to eight hours of continuous measurement.  Interface. Keyboard and backlighted screen.  GPS. Measurements tracking.  Alignment system. Monitoring of absorber tube bending. Commercially available April 2016 Mini Incus: device description
  • 5. 5 Mini Incus: description  Reflectance and transmittance are measured at 14 different wavelengths: Expanded uncertainty Uτ (k=2, 95% confidence) 0.4 % Range of wavelengths measured and uncertainty - Transmittance and reflectance build up from 300 to 2500 nm - ASTM G-173 standard is applied on the built function in order to obtain the final results.  Uncertainty of the measurement
  • 6. 6 Mini Incus: commercial application Statistical evaluation of a 100 MW parabolic trough plant takes 2 hours Application to commercial plants  Solana (USA) and Solnova (Spain). Mini Incus used to obtain valuable information on the receivers’ performance in these commercial plants.  Quality control. Tracking specifications of receivers after being installed in Solana  International expansion. Progressive worldwide expansion to the rest of Abengoa’s plants.  Know-how acquired. - Soiling ratio of receivers - State of absorber coating and transmittance after years of operation - Efficiency of different cleaning methods - Impact of rain on transmittance - Influence of external factors and geographic location on soiling A step further on the road to reduced STE technology and O&M costs!
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