Effect of soiling in CPV systems

Vivar, Marta; Herrero, Rebeca; Antón, Ignacio; Martínez‐Moreno, F.; Moretón, Rodrigo; Sala, Gabriel; Blakers, Andrew; Smeltink, John

doi:10.1016/j.solener.2010.03.031

Cited by 158 publications

(42 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If it is supposed that DDP is proportional to dust deposition rate, it may be calculated with the Under circumstances exposed in this study, the annual loss of electric energy into the grid is estimated in only 3.6%. This data is in accordance with experimental findings by other reports [15,16] and commonly used factors for estimation of life cycle assessments for PV systems [17]. As a consequence, the benefits of additional cleaning of modules could be questioned.…”

Section: Resultssupporting

confidence: 90%

Performance Reduction of PV Systems by Dust Deposition

et al. 2014

View full text Add to dashboard Cite

The deposition of dust on photovoltaic modules is of importance as parameter for economic analysis and life cycle assessments to evaluate this kind of technology for generation of electricity. Even though during the last two decades several photovoltaic plants were implemented, only a few studies about this issue were performed. This work tries to estimate the annual loss of generated energy caused by dust deposition on PV modules based on an experimental setup of a grid connected PV plant, monitoring of solar irradiation, onsite determination of dust deposition rate, and processing climatic data to obtain information about the frequency of rainfall occurrence. In Mexico City, air pollution with suspended particulate matter with diameter below 10 μm (PM 10) is almost permanently over 50 μg m -3 . This contamination contributed to an average dust deposition rate of 65 g m -2 d -1 on horizontal surfaces. Dust accumulation during rainless periods of more than 60 days can reduce production of PV systems up to 15%. With the capacity of natural cleaning by rainfalls, annual loss of production is estimated to be 3.6%.

show abstract

Section: Resultssupporting

confidence: 90%

Performance Reduction of PV Systems by Dust Deposition

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Good monitoring procedures also allow for independent and automatic reporting of the performance of the CPV plant over time, which is of great help to financial investors. We argue that the losses resulting from soiling on the CPV modules are still largely ignored or underestimated [88]. Dirt attenuates the direct much more than the global irradiance, but little has been published on this issue for the particular case of CPV.…”

Section: Certificate Of Final Acceptance (Cfa)mentioning

confidence: 97%

A bankable method of assessing the performance of a CPV plant

et al. 2014

View full text Add to dashboard Cite

HIGHLIGHTS• This methodology allows estimating the long-term energy production of a CPV project with a = 5%.• The long-term trend of DNI is determined from satellite and its bias is corrected through a measurement campaign.• The Yield Assessment is carried out using a physical model that simulates the energetic yield of a reference CPV system.• The Certificate of Provisional Acceptance is delivered through on-site measurements achievable within one or two weeks.• The Certificate of Final Acceptance is awarded on the basis of a continuous monitoring campaign during 1 or 2 years. ABSTRACTConcentrating Photovoltaics (CPV) is an alternative to flat-plate module photovoltaic (PV) technology. The bankability of CPV projects is an important issue to pave the way toward a swift and sustained growth in this technology. The bankability of a PV plant is generally addressed through the modeling of its energy yield under a baseline loss scenario, followed by an on-site measurement campaign aimed at verifying its energy performance. This paper proposes a procedure for assessing the performance of a CPV project, articulated around four main successive steps: Solar Resource Assessment, Yield Assessment, Certificate of Provisional Acceptance, and Certificate of Final Acceptance. This methodology allows the long-term energy production of a CPV project to be estimated with an associated uncertainty of -5%. To our knowledge, no such method has been proposed to the CPV industry yet, and this critical situation has hindered or made impossible the completion of several important CPV projects undertaken in the world. The main motive for this proposed method is to bring a practical solution to this urgent problem. This procedure can be operated under a wide range of climatic conditions, and makes it possible to assess the bankability of a CPV plant whose design uses any of the technologies currently available on the market. The method is also compliant with both international standards and local regulations. In consequence, its applicability is both general and international.

show abstract

“…The total electrical output of HCPV systems has been shown (Vivar et al, 2010) to be more sensitive to soiling than flat plate PV due to the reduction in light reaching the device. However; some wavelengths of light can scatter through the soil, resulting in an altered spectrum at the receiver.…”

Section: Introductionmentioning

confidence: 99%

Predicting the spectral effects of soils on high concentrating photovoltaic systems

2015

View full text Add to dashboard Cite

Soiling losses on high concentrating photovoltaic (HCPV) systems may be influenced by the spectral properties of accumulated soil. We have predicted the response of an isotype cell to changes in spectral content and reduction in transmission due to soiling using measured UV/vis transmittance through soil films. Artificial soil test blends deposited on glass coupons were used to supply the transmission data, which was then used to calculate the effect on model spectra. The wavelength transparency of the test soil was varied by incorporating red and yellow mineral pigments into graded sand. The more spectrally responsive (yellow) soils were predicted to alter the current balance between the top and middle subcells throughout a range of air masses corresponding to daily and seasonal variation.

show abstract

Effect of soiling in CPV systems

Cited by 158 publications

References 7 publications

Performance Reduction of PV Systems by Dust Deposition

Performance Reduction of PV Systems by Dust Deposition

A bankable method of assessing the performance of a CPV plant

Predicting the spectral effects of soils on high concentrating photovoltaic systems

Contact Info

Product

Resources

About