The material was selected due to its exceptionally low warpage, high stiffness and excellent electrical insulating properties. One of the first commercial installations of the CPV modules is scheduled for September 2008 at the ISFOC (Instituto de Sistemas Fotovoltaicos de Concentración) in Puertollano (Ciudad Real), with plans for a second, 1 MW-rated unit in Castilla La Mancha Community in due course.
The large housing for the concentrated photovoltaic module, measuring 83.3 cm x 56.5 cm, is moulded from DuPont™ Rynite® polyethylene terephthalate (PET) due to the material’s good dimensional stability, low distortion, attractive surface qualities and excellent melt flow.
Concentrated photovoltaic ( or CPV) uses mirrors or lenses to ‘concentrate’ or focus light from a relatively broad collection area onto a small area (as little as 1 sq. cm) of active semiconductor PV material based on Group III and V elements in the periodic table. These systems show very high cell conversion efficiencies of over 36 percent.
The concentrated photovoltaic modules, developed by the Spanish start-up company Concentración Solar La Mancha S.L., consist of six concentrator elements and automatically track the sun’s movement across the sky to within 0.2° of accuracy. Such precision enables them to achieve efficiency levels of 20 to 24 percent in terms of electricity production, compared to 15 to 16 percent for modules with conventional silicon cells.
They are housed and supported in a frame moulded from a mica- and glass-reinforced grade of DuPont™ Rynite® polyethylene terephthalate (PET), selected as an alternative to powder-coated aluminium. “We were clear from the outset that we wanted to replace metal with a high performance polymer due to the benefits associated with the change, including corrosion resistance, design flexibility and lower processing cost and material costs. Through the integration of additional functions in the housing, we were able to reduce the number of manufacturing steps,” explains Miguel Trinidad Aragon, CEO of Concentración Solar La Mancha. Rynite® 935 BK505 was chosen for the application due to its exceptionally low warpage, high stiffness and excellent electrical insulating properties. Exposed to around-the-clock outdoor weather conditions, the material was required to provide excellent heat (temperatures of up to 85 °C) and UV resistance, as well as the structural support required for the entire CPV module to withstand high winds.
Fundamental to the project’s success has been the close working partnership between plastic injection-moulding specialist Teknia Plasticos Martos S.A.U of Jaén, Spain, Concentración Solar La Mancha and DuPont. Teknia worked closely with DuPont on mould design – the tool was actually produced in China and prepared within the shortest of time frames thanks to the support of DuPont China. “Despite the housing’s large dimensions (83.3 cm x 56.5 cm), complicated shape and the required wall thickness (3 mm), the excellent melt flow of Rynite® ensures the uniform filling on the mould cavity and the consistent production of moulded parts with good dimensional stability, low distortion and attractive surface qualities within short cycle times,” comments David Peña, development leader at Teknia Plasticos Martos.
The DuPont Engineering Polymers business manufactures and sells Crastin® PBT and Rynite® PET thermoplastic polyester resins, Delrin® acetal resins, Hytrel® thermoplastic polyester elastomers, DuPont™ ETPV engineering thermoplastic vulcanizates, Minlon® mineral reinforced nylon resins, Thermx® PCT polycyclohexylene dimethyl terephthalate, Tynex® filaments, Vespel® parts and shapes, Zenite® LCP liquid crystal polymers, Zytel® nylon resins and Zytel® HTN high-performance polyamides. These products serve global markets in the aerospace, appliance, automotive, consumer, electrical, electronic, healthcare, industrial, sporting goods and many other diversified industries.
DuPont is a science-based products and services company. Founded in 1802, DuPont puts science to work by creating sustainable solutions essential to a better, safer, healthier life for people everywhere. Operating in more than 70 countries, DuPont offers a wide range of innovative products and services for markets including agriculture and food; building and construction; communications; and transportation.
The DuPont Oval, DuPont™, The miracles of science™ and Rynite® are registered trademarks or trademarks of E.I. du Pont de Nemours and Company or its affiliates.This press release is based on information provided by:
Barely scratching the surface: A new way to make robust membranes
13.12.2018 | DOE/Argonne National Laboratory
Topological material switched off and on for the first time
11.12.2018 | ARC Centre of Excellence in Future Low-Energy Electronics Technologies
The more objects we make "smart," from watches to entire buildings, the greater the need for these devices to store and retrieve massive amounts of data quickly without consuming too much power.
Millions of new memory cells could be part of a computer chip and provide that speed and energy savings, thanks to the discovery of a previously unobserved...
What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.
Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...
Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
14.12.2018 | Power and Electrical Engineering
14.12.2018 | Physics and Astronomy
14.12.2018 | Physics and Astronomy