It's always the sun
Fact: The earth receives more energy from the sun in just one hour, than the world's population uses in a whole year.
For billions of years, the sun has been our major energy resource. Solar energy is the solar radiation that reaches the earth, which can be converted directly or indirectly into other forms of energy. The sun shines, hot air rises, causing air to move in the form of wind. The wind blows over the land and sea, the water flows, moving boats, windmills and wind turbines. A variety of technologies have been developed over the years, to take advantage of solar energy for various uses. One of them, an Israeli invention, called Heat Energy Tower, use hot climate and sea water spray to operate turbines which produce electricity. The models displayed in the exhibition will use a constant light from a flashlight on solar collectors, and demonstrate how it creates light.
Gone with the wind
Fact: In 10 minutes, a hurricane releases more energy than all of the world's nuclear weapons combined.
We have been harnessing the wind's energy for hundreds of years. Today, the windmill's modern equivalent - a wind turbine - can convert the wind’s kinetic energy into electricity. It does not produce any pollution and is a form of energy that is sustainable. Wind turbines, like windmills, are mounted on a tower to capture the wind's energy with their propeller-like blades. Usually, two or three blades are mounted on a shaft to form a rotor which spins a generator to make electricity.
Visitors will be able to observe one type of wind energy technology, discover how wind turbines work and learn about optimal wind conditions. They will gain knowledge of the applications and energy impacts of the new source of renewable energy, wind turbines.
Water under the bridge
Fact: The amount of heat generated by an average adult each day could boil eight gallons of water.
Flowing water creates energy that can be captured and turned into electricity. This is called hydroelectric power or hydropower. The most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricity. Some hydroelectric power plants just use a small canal to channel the river water through a turbine. The quantity of electricity generated is determined by the volume of water flow and the height from turbines in the power plant to the water surface, created by the dam.
Hydropower is a clean, domestic and renewable source of energy. Hydropower plants provide inexpensive electricity and produce no pollution. Unlike other energy sources such as fossil fuels, water is not destroyed during the production of electricity and can be reused for other purposes. Save your energyFact: Laptops use 90% less energy than desktops.
There are many ways in which our homes can be connected to the natural world. A keynote exhibit area will be a Smart House, an energy-efficient house, where visitors will learn about the advantages of using energy conserving technologies. The house will be designed and planned on the principles of sustainable energy in all aspects, from electricity and water consumption, to minimal manufacture of waste. The energy-cost of each house application will be clearly displayed and visitors will be able to change the ‘behavior’ of the house by turning on/off certain machines, or choosing between some possibilities.
• Lighting the house – Fluorescence tube or halogen lamp?
• Heating water for bath - solar water heater or boiler?
• Air conditioning or air flow with open windows?
• Flushing the water in the toilet. Fresh water or gray water, half tank or full tank
Visitors to the structure will be able to walk away with a wealth of new ideas that they can take back to their own homes to implement and design their personal environment.