Innovated procedure in solar trackers design

Innovated procedure in solar trackers design

2019年02月19日 星期二

The structural international regulations are not sufficient to face the current aeroelastic phenomena. Nclave company provide a solution for this emptiness in the field of trackers design.

The innovative process incorporates several requirements to be fulfilled during trackers design, overcoming the deficiency dragged by international standards.

Designed by the photovoltaic company Nclave, this method includes an update which considers the structures behavior in front of dynamic effects as flutter or torsional galloping, which were not taken as relevant until now. Its application has developed, as a result, the new single row tracker SP 160 2V.

It is a fact, that the structural international regulations are insufficient to guarantee the solar trackers integrity while facing aeroelastic phenomena due to wind blow. The new challenges of this industry, going all the way through the maximum optimization of the resources to manage to reduce the LCOE, have led to much bigger trackers than their predecessor. This new reality implies a challenge that neither ASCE nor EUROCODE contemplated within enough consideration.

BACKGROUND, PROBLEMS OF AEROELASTIC INSTABILITY

As well as it happened to the engineers responsible of the design of Tacoma bridge, the optimization in the structures design and the use of new and far more resistant materials have led to slender structures. The static design is not the key factor in structural calculation anymore, making aerodynamic phenomena as flutter critical aspects that condition the tracker design.

Flutter or torsional galloping are aeroelastic non-stationery instabilities. These complex phenomena imply the alternate detachment of vortexes in the back and top sides of the photovoltaic module due to its oscillation.

STUDY OF DYNAMIC BEHAVIOUR

Due to these issues, Nclave detected the need to fulfill several researches to reframe the single row tracker design SP160 2V. Among different analysis, there is the study of aeroelastic wind tunnel, whereby the critical wind speed in which the tracker suffers flutter was calculated. In this study, 62 different configurations were analyzed. One of the main conclusions obtained from this study was that, staying in horizontal position, the critical speed is higher than in the rest of tested positions.

Through CFD analysis and the provisional FEM, the reduction of wind speed between rows and the increase of tension in the tracker due to flutter was evaluated. The conclusion was the existence of an important reduction in the wind impact due to the rows effect.

Combining these studies and tests results with the measurement of the tracker dynamic parameters in an experimental modal test, it is evaluated if it could suffer an aeroelastic instability. This evaluation allows the individualized study per project according to the design speed.

In short, this analysis of structural design, validated by first level engineering, manages to solve the implicit deficiencies of the regulations and offers a solution to the singularities of dynamic behavior in this type of structures.

Nclave manage to keep leading in the design and manufacturing of photovoltaic solar trackers in any configuration, and under any type of request.

 

 

 

Nclave strengthens its shareholding structure with the entry of Trina Solar into its capital

Nclave strengthens its shareholding structure with the entry of Trina Solar into its capital

2018年05月23日 星期三

Trina Solar, the Chinese leading supplier of global solutions for the photovoltaic sector, has reached an agreement to acquire a controlling interest in Nclave.
This agreement consolidates the strategic one signed this March between both companies; an engagement to jointly develop, commercialize and install integrated solutions for the photovoltaic sector with Nclave’s advanced photovoltaic tracker.
This corporate transaction reinforces Nclave’s position in the photovoltaic tracker market; and boosts the company’s growth plans. This change will enhance Nclave’s strategic plan and global positioning by increasing its already wide client portfolio. Nclave bankability and financial backing also receive a huge boost with the entry of Trina Solar as the new controlling share holder.

Trina Solar Limited, founded in 1997, is one of the leading companies in the solar sector worldwide. Currently, the company is immersed in an ambitious transformation process with the aim of becoming one of the main suppliers of global solutions in the solar sector. The company´s leading position in the industry is based on innovation excellence, high quality products, vertically integrated capacities and an environmentally efficient, responsible management.
This March, which marks the company’s twentieth anniversary, Trina Solar launched the TrinaPro solution; offering an optimized integration of modules-trackers-inverter, with the objective of reducing the LCOE for photovoltaic installations. Nclave will design and integrate trackers and solar structures within the TrinaPro intelligent solutions.

About Nclave,
Nclave was founded by the Clavijo Family and integrated the company with MFV in 2017 together with the participation of the fund Q-Growth. Nclave has over 12 years of experience in renewable energy, having provided more than 2.5 GW’s worth of structures worldwide. It currently has its headquarters in Madrid (Spain), commercial offices on five continents and manufacturing facilities in Navarra (Spain).
Nclave is a leading company in the development, design, manufacturing, installation and maintenance of fixed structures and photovoltaic solar trackers, including completed design services for all foundation solutions. Nclave will continue to offer the widest range of products (fixed structures and single and multi row trackers with any configuration) to the market at large for all photovoltaic solar projects. Nclave solutions represent the minimum investment, installation, operations, and maintenance costs for solar projects today.

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