background preloader


Facebook Twitter

Pesquisadores criam peneira que transforma água do mar em água potável. What is Microhydro Power? What is Microhydro Power?

What is Microhydro Power?

Hydro-electricity is fundamentally the combination of water flow and vertical drop (commonly called “head”). Vertical drop creates pressure, and the continuous flow of water in a hydro system gives us an ongoing source of pressurized liquid energy. Pressurized, flowing water is a very dense resource, and hydro-electric systems convert a very large percentage of the available energy into electricity because the resource is captive in a pipe or flume.

People have been tapping the energy in flowing water for centuries, first for mechanical power, and, in the last hundred years, for electricity. Early applications included milling, pumping, and driving machinery. Bomba Barsha es capaz de bombear 45.000 litros de agua al día sin combustible. Pratap Thapa ha diseñado una solución eficiente y barata que permite bombear agua sin depender del combustible.

Bomba Barsha es capaz de bombear 45.000 litros de agua al día sin combustible

La Bomba Barsha, desarrollada por la empresa holandesa aQysta, de la cual Pratap es cofundador, es una rueda hidráulica que se coloca sobre una plataforma flotante en un río y que utiliza la energía cinética del agua para bombear el agua a través de mangueras. Para su diseño se basaron en tecnologías desarrolladas en el antiguo Egipto. Su funcionamiento es sencillo, no utiliza ningún tipo de combustible ni electricidad para su funcionamiento, usa la energía cinética del caudal de agua para mover la rueda. The innovators: US scientists harness the power of evaporating water. A small Lego device on the shelf of professor Ozgur Sahin’s office at Columbia University could open up the possibility of another form of renewable energy, and one that is much cheaper than solar and wind.

The innovators: US scientists harness the power of evaporating water

Sahin has used the simple gadget to prove that evaporating water can be used to generate power, which could eventually lead to energy being generated from still reservoirs. At the centre of the research by Sahin and his team in New York are spores of common soil bacteria that expand, much like a muscle, when there is moisture in the atmosphere, and contract in drier conditions. In 2009, Sahin started to investigate whether there was a practical application to this expansion and contraction.

By putting thin layers of the spores on plastic tapes and controlling the amount of moisture in the air, they expand and contract very quickly, creating movement on the tapes. Estudantes criam parede que promete substituir ar condicionado. Fonte: Olhar Digital A hidrocerâmica é composta de bolhas de hidrogel que são capazes de reter até 400 vezes o seu volume em água.

Estudantes criam parede que promete substituir ar condicionado

Aparelhos de refrigeração e climatização são comuns em muitas casas em empresas. Estes equipamentos, que ajudam a amenizar o desconforto das altas temperaturas, são responsáveis por grande parte do consumo de energia elétrica, além de contribuírem para a chamada “pegada de carbono”, que mede a quantidade de CO2 produzida diariamente por cada pessoa. Nava: A Revolutionary Filtering Water Bottle - Sistema feito por garota de 17 anos purifica água e gera energia. The Latest Clean Energy Cocktail: Bacteria And Fungus. By Jeff Spross "The Latest Clean Energy Cocktail: Bacteria And Fungus" By throwing together a common fungus and a common bacterium, researchers are producing isobutanol — a biofuel that gallon-for-gallon delivers 82 percent of gasoline’s heat energy.

The Latest Clean Energy Cocktail: Bacteria And Fungus

The more common ethanol, by contrast, only gets 67 percent of gasoline’s energy, and does more damage to pipelines and engines. And the University of Michigan research team did it using stalks and leaves from corn plants as the raw material. The fungus in question was Trichoderma reesei, which breaks down the plant materials into sugars. The University of Michigan team also got the fungi and bacteria to co-exist peacefully in the same culture and bioreactor. The big advantage of a cellulosic biofuel like this is twofold. Two, by driving up demand for food crops, traditional biofuels encourage individuals and countries to clear ever more natural land for agriculture. And it’s not just fossil fuels that could be replaced, either. Central hidroeléctrica casera y económica. Navegando me encontré con este curioso diseño de turbina hidráulica hecha por muy bajo costo y de forma muy sencilla.

Central hidroeléctrica casera y económica

Sam Redfield es el responsable de este brillante diseño donde con un cubo de plástico de unos 20l podría servir uno de pintura por ejemplo, y unas tuberías de PVC junto con un alternador de imanes permanentes como generador eléctrico obtiene este pequeña fuente de energía limpia. Turbina funcionando en Guatemala. Al generador se le instala un regulador de voltaje, una batería de automóvil y un inversor. La batería almacena la energía, el regulador controla el voltaje e impide la sobrecarga de la batería y el inversor transforma la corriente directa en alterna.

Según el inventor se puede generar 60 Watts, capaz de cargar 10 teléfonos móviles al mismo tiempo sin que se reduzca la carga de la batería. New device generates electricity from condensation. MIT researchers have found a way to generate small amounts of electricity from condensation, by having electrically-charged droplets jump between superhydrophobic (water-repelling) and hydrophilic (water-attracting) metal plates.

New device generates electricity from condensation

The advance could be especially useful in remote areas or developing countries, not least because it produces clean water as a side product. While pulling electricity out of thin air is a physical impossibility, producing it from water droplets in the atmosphere is very much within our reach. We have known for years that droplets are capable of carrying an electric charge, so properly harnessing this phenomenon under controlled conditions could lead to an exciting new source of renewable energy. Now, a team led by Nenad Miljkovic at MIT seem to have done just that, by finding a way to generate electricity simply by harnessing the humidity in the air. The researchers have used this phenomenon to generate electricity. Source: MIT Share. HEB Home. BioPower Systems. The microhydro plant.

My little paradise has a stream that provides enough water flow and head to run a small turbine, to provide electricity to my home.

The microhydro plant

While writing this, the microhydro plant is being implemented, and here are some photos of the process. Since I usually like to start at the end, the first thing I built is the controller: It is an implementation of Jan Portegijs' "Humming Bird", with some changes and adaptations. The largest cost of the plant, by far, is in the piping for the rather long penstock. When the purchase was made and the truck arrived, we unloaded the pipes at different places, to get them as close to the installation area as possible.

A smaller number of pipes were stored closer to the turbine site. Only for the last part of the run, where the pressure exceeds 2 bar, I will use blue class 4 PVC pipe. To change from the low slope run of the white pipe to the much steeper run of the blue one, a change of direction is required. The flat area is where the forebay will be built. News! Shower of the Future. Pump Water Without Electricity - energy of flowing water.