Placas Solares Fotovoltaicas Cómo se fabrican

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Javier Atencia entrevista a David González, Director de Marketing de Isofotón, sobre el proceso de fabricación de las placas solares fotovoltaicas, haciendo un recorrido por la planta de fabricación de las mismas.

Fuente: Mundo Digital

g-C₃N₄-Based Photocatalysts for Hydrogen Generation

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Fuente: American Chemical Society

Safer Salts For Solar-Cell Production Chemical and Engineering News Matt Davenport

A magnesium salt may reduce the hazards and costs of making thin-film photovoltaic devices

Substituting magnesium chloride for toxic cadmium chloride could free cadmium-telluride solar-cell manufacturers from a costly and hazardous process without sacrificing efficiency, according to a new study.

At the heart of a standard CdTe solar cell is a photovoltaic junction formed by the interface between neighboring thin layers of CdS and CdTe. Without processing the layers after deposition, a cell converts incident solar power into electric power with less than 5% efficiency. Manufacturers bump this up to between 10 and 20% using a junction activation step.

For more than two decades, activation has relied on CdCl2, usually deposited as a thin coating on the cell’s CdTe layer. When the cell is heated, chloride diffuses through its stacked structure and reforms the physical and electronic characteristics of the cadmium-containing layers, leaving a more efficient photovoltaic junction.

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Wearable Textile Battery Rechargeable by Solar Energy

Wearable electronics represent a significant paradigm shift in consumer electronics since they eliminate the necessity for separate carriage of devices. In particular, integration of flexible electronic devices with clothes, glasses, watches, and skin will bring new opportunities beyond what can be imagined by current inflexible counterparts. Although considerable progresses have been seen for wearable electronics, lithium rechargeable batteries, the power sources of the devices, do not keep pace with such progresses due to tenuous mechanical stabilities, causing them to remain as the limiting elements in the entire technology.

Herein, we revisit the key components of the battery (current collector, binder, and separator) and replace them with the materials that support robust mechanical endurance of the battery. The final full-cells in the forms of clothes and watchstraps exhibited comparable electrochemical performance to those of conventional metal foil-based cells even under severe folding–unfolding motions simulating actual wearing conditions. Furthermore, the wearable textile battery was integrated with flexible and lightweight solar cells on the battery pouch to enable convenient solar-charging capabilities.

Wearable Textile Battery Rechargeable by Solar Energy
Yong-Hee Lee, Joo-Seong Kim, Jonghyeon Noh, Inhwa Lee, Hyeong Jun Kim, Sunghun Choi, Jeongmin Seo, Seokwoo Jeon, Taek-Soo Kim, Jung-Yong Lee, and Jang Wook Choi
Nano Letters 2013 13 (11), 5753-5761

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Harvesting Energy from CO2 Emissions ACS Publications

When two fluids with different compositions are mixed, mixing energy is released. This holds true for both liquids and gases, though in the case of gases, no technology is yet available to harvest this energy source. Mixing the CO2 in combustion gases with air represents a source of energy with a total annual worldwide capacity of 1570 TWh. To harvest the mixing energy from CO2-containing gas emissions, we use pairs of porous electrodes, one selective for anions and the other selective for cations. We demonstrate that when an aqueous electrolyte, flushed with either CO2 or air, alternately flows between these selective porous electrodes, electrical energy is gained. The efficiency of this process reached 24% with deionized water as the aqueous electrolyte and 32% with a 0.25 M monoethanolamine (MEA) solution as the electrolyte. The highest average power density obtained with a MEA solution as the electrolyte was 4.5 mW/m2, significantly higher than that with water as the electrolyte (0.28 mW/m2).

Harvesting Energy from CO2 Emissions
H. V. M. Hamelers, O. Schaetzle, J. M. Paz-García, P. M. Biesheuvel, and C. J. N. Buisman
Environmental Science & Technology Letters Article ASAP

Fuente: ACS Publications

Usinas Termoeléctricas Canal Encuentro

Fuente: Manfenix08

Energía de las Corrientes Marinas Infografía Medio Ambiente Consumer Eroski

Fuente: Eroski Consumer

Biomasa Energías Renovables

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Biomasa es el conjunto de la materia orgánica, de origen vegetal o animal y los materiales que proceden de su transformación natural o artificial.

En este documental vemos las posibilidades de este sistema energético a nivel municipal, en concreto la instalación de Cuéllar, Segovia

Fuente: Mitycidae

Biocombustibles - Energías Eficientes Canal Encuentro

Fuente: Manfenix08