sexta-feira, 17 de junho de 2011

Solar Power Bikini

Despite its general lack of, um, surface area, a new "photovoltaic bikini" designed by Andrew Schneider apparently provides enough power to run your MP3 player.

ies - this could be the perfect fit for a day of lounging on the beach or by the pool.

Clean Energy Authority reports that Solar Bikini got its start when the designer was in graduate school in a sustainability course at New York University.

As a joke, Schneider said he wanted to create a bikini that could cool beer at the beach; a couple weeks later, he realized that the design was actually feasible, using traditional fabrics and thin film solar.

The challenge here, of course, was to get enough surface area to provide real power while keeping the bikini "small and sexy." 

Schneider overcame this challenge by completely covering the bathing suit in solar cells - though apparently the power here is more appropriate to powering tunes than your portable refrigerator. (Stay tuned, though, guys, as a pair of solar trunks are apparently in the works.)

While Schneider believes the Solar Bikini is more of a fun, educational concept design than a commercial product, he is offering the Solar Bikini through Solar Coterie for $200.

Each suit comes with female (yes) USB connections to charge various devices and was designed exclusively for sunbathing - so don't even think about getting it wet.

Susan DeFreitas, EarthTechling


segunda-feira, 13 de junho de 2011

Energia a partir de água, sol e vento

Pesquisadores da Universidade de Bolton, no Reino Unido, desenvolveram um gerador de energia elétrica "híbrido", que é capaz de produzir energia tanto por meio de painéis solares quanto pelo movimento de algumas de suas partes, que pode ser induzido tanto pelo vento quanto por gotas de chuva.

Elias Siores, do Instituto de Pesquisa e Inovação em Materiais da universidade, conta que a maioria dos geradores de "energia limpa" são intermitentes, ou seja, possuem períodos de inatividade, seja por falta de ventos, seja por falta de luz solar, por exemplo. Pensando nisso, conta o site New Scientist, Soires e seus colegas queriam algo que pudesse gerar energia a partir de diferentes elementos, ficando, assim, livre destes períodos sem produtividade.

Os pesquisadores criaram um dispositivo feito de um polímero piezoelétrico, capaz de gerar energia quando perturbado, seja pelo vento, seja por gotas de chuva. Além disso, eles envolveram cada um destes dispositivos em um filme fotovoltáico flexível, que produz energia elétrica a partir da energia solar.

Assim como comenta o site Dvice, talvez o que há de mais interessante na invenção dos pesquisadores britânicos é que, de uma só vez, eles utilizaram como "combustível" três dos principais elementos das energias renováveis.

Soires conta ainda que este mesmo tipo de tecnologia pode ser utilizada na fabricação de tecidos. Assim, roupas poderão gerar energia para carregar baterias de gadgets, por exemplo, seja ao sol, seja sob condições de vento ou chuva.


BASF - Solar Energy

Mainz / Munich / Ludwigshafen, 8 June 2011 . At the Intersolar trade fair, SCHOTT Solar and BASF are presenting a new roof-integrated photovoltaic concept based on the SCHOTT ADVANCE Series. The concept employs only two parts: a specially developed, multi-functional pan made from the BASF resin Ultramid® B High Speed and a frameless double-glazed module from SCHOTT. The product has been designed for large roof areas on industrial or agricultural buildings and is very light and easy to install.

Roof-integrated lightweight plastic pan with multiple functions

The one-piece plastic pan, which can be installed directly on the roof substructure of a building in place of conventional roofing, combines several functions and employs a new fastening method.

Tool-free installation of the PV module

After the plastic pan has been fastened to the roof substructure at four points, the only remaining step is to insert the rugged double-glazed module into the pan’s precision mounting system and secure it in position by means of an integrated latch. The PV module from the SCHOTT PROTECT Series employs proven double-glazing technology for reliable protection against rain, hail and other adverse weather conditions. To ensure safe handling of the double-glazed module, handles that are also made from Ultramid® are provided on the back. This makes it easy to carry the PV module, place it on the integrated support edges of the plastic pan and simultaneously secure it at all four attachment points quickly and without the need for tools by sliding the module into the latching mechanism on the pan (Click & Go). Moreover, the new bayonet connection and screw-free attachment to the pan provide automatic tolerance compensation. The pan itself is stackable, thus minimizing shipping volume.

Rain channels, back ventilation and cable channels included

Channels integrated into the pan ensure that rainwater drains away easily. Additional channels in the pan’s structure facilitate the installation of electrical cables. Thanks to the large opening in the center of the pan, the plastic part of the 1.7 m² photovoltaic module weighs only 8 kg and has adequate back ventilation. As with a classical roof tile, specially designed edges permit overlapping with adjacent modules, providing further protection against rain.

Plastic and part design

The approximately 1.2 m x 2.0 m plastic pan presented a challenge for the engineering resin (polyamide) and the part design: the long flow paths and sometimes thin walls require an easy-flowing resin in order to produce the part by means of conventional injection molding. For this reason, the application development engineers at BASF recommended Ultramid® B High Speed, one of the new especially easy-flowing grades in the polyamide 6 range. The good flow characteristics of the resin, in conjunction with the opening in the pan, also help to reduce manufacturing costs: it can be processed on injection molding machines with a lower clamping force.

An additional benefit of the special Ultramid grade for this part is its toughness. To withstand the strong solar radiation, the resin must furthermore exhibit high strength even at elevated temperatures as well as exceptional UV resistance and resistance to weathering. In terms of fire behavior, Ultramid® B High Speed satisfies the criteria required for such construction applications (material class B2).

Doubly beneficial PV module

The dimensions of the double-glazed PV module, which has been designed for large roof areas, combine exceptionally good product characteristics with a high efficiency per unit area. The integrative solution ensures a considerable reduction in the number of steps necessary for installation. Working direction during roofing is left to the roofer. The ease of handling provided by the built-in handles permits use of frameless double-glazed modules, thereby preventing the accumulation of dirt on the surface.

Additional information: at and at