Tag Archives: Renewable Energy

Clean Energy through the Roof Glass

Glass roofs can be used as a self-generating source for heating households, by capturing solar heat. An swedish invention has developed tile formed glassparts that captures the sun heating and between the roof battens are built special liquid absorber models that harvests sun’s energy and coverts the energy to heat. Aesthetic it gives the roof a nice icy look. The system cuts also the energy costs significantly all year around.

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Sources and photos: www.kth.se, inhabitat.com

What is Geothermal Energy?

Geothermal Energy is generated and stored in the earth, under the soil. It is earth heat converted to energy. This kind of energy has been used since ancient Roman times from hot springs, and as other environmental friendly energy sources it is nothing new, but just modernized. Geothermal power is cost effective, reliable, sustainable and environmentally friendly. This alternative suits well for all types of energy consuming areas as industry, greenhouses and homes.

Geothermal sources under the soil releases greenhouse gases, but the emissions are much lower that fossil fuels and is a good alternative to replace usage of fossil fuels. This energy alternative can easily cover all of the humanitys needs. It is an energy source that will grow significantly the coming years as the investment costs has reduced and people has showed interest to pay more for renewable energy.

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Two sources for geothermal energy are magma and hot water springs

Thermal energy plants was before built only where high temperatures were to be found close to the surface, but thanks to developed technology as e.g. better drilling equipment, the areas are today wide spread. Thermal energy today is converted from hot waters to magma. Almost anywhere the temprature three meters under the soil is between 10-16 °C (50-60 °F) and this is enough to install a heat pump.

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Nesjavellir Geothermical Power Station in Iceland

Green Energy: Biomass

Biomass as a renewable energy source, is biological material from living, or recently living organisms. As an energy source, biomass can either be used directly, or converted into other energy products such as biofuel.

1) Biomass is plant matter used to generate electricity with steam turbines & gasifiers or produce heat, usually by direct combustion. Examples include forest residues (such as dead trees, branches and tree stumps), yard clippings, wood chips and even municipal solid waste.

2) Biomass includes plant or animal matter that can be converted into fibers or other industrial chemicals, including biofuels. Industrial biomass can be grown from numerous types of plants, including miscanthus, switchgrass, hemp, corn, poplar, willow, sorghum, sugarcane, bamboo, and a variety of tree species, ranging from eucalyptus to oil palm (palm oil).

.1Biomass power plant in Medan, North Sumatra

Biomass energy is derived from five distinct energy sources: garbage, wood, waste, landfill gases, and alcohol fuels. The largest source of energy from wood is pulping liquor or “black liquor”, a waste product from processes of the pulp, paper and paperboard industry. Waste energy is the second-largest source of biomass energy. The main contributors of waste energy are municipal solid waste, manufacturing waste, and landfill gas. Biomass can be converted to other usable forms of energy like methane gas or transportation fuels like ethanol and biodiesel. Rotting garbage, and agricultural and human waste, all release methane gas—also called “landfill gas” or “biogas.” Crops, such as corn and sugar cane, can be fermented to produce the transportation fuel, ethanol. Biodiesel, another transportation fuel, can be produced from left-over food products like vegetable oils and animal fats.

A biomass plant can be used by farms e.g. a 500 kW plant, or bigger up to several mW to provide e.g. cities with electricity.

If Biomass is environmental friendly are still under critical discussions. Biomass is a renuable source of energy.

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