Archive for June, 2012

electric energy

Posted on:June 30th

 Electric Energy

Electric Energy uses the power of the sun to produce electricity through solar cells, otherwise known as photovoltaics (PV). It can be applied in three ways:

1. Stand-alone

2. Grid-connected

3. Back-up

thermal energy

Posted on:June 29th

Thermal Energy

Thermal Energy is everywhere. It’s lights up our days. It heats the earth, our bodies and our homes. It dries our clothes and gives us produce like sun-dried tomatoes. All for free!

It’s also used to heat water for domestic use or even pools. There are two ways in which water can be heated:

1. Actively, when a conventional heating element within the solar hot water system heats water on hot days.

2. Passively, when water is preheated before it is delivered to the cold inlet of a conventional gas/ electric water heater.

 

Thermal Energy

Thermal Energy is everywhere. It’s lights up our days. It heats the earth, our bodies and our homes. It dries our clothes and gives us produce like sun-dried tomatoes. All for free!

It’s also used to heat water for domestic use or even pools. There are two ways in which water can be heated:

1. Actively, when a conventional heating element within the solar hot water system heats water on hot days.

2. Passively, when water is preheated before it is delivered to the cold inlet of a conventional gas/ electric water heater. 

Wind & Solar Power Facts

Posted on:June 9th

Wind power

1. In 200 B.C., people in China and the Middle East used windmills to pump water and grind grain.Wind Mill

2. The first modern wind turbine was built in Vermont in the early 1940s.

3. Wind farms currently produce enough electricity to meet the needs of more than 600,000 families in the United States.

4. The largest wind turbine in the world, located in Hawaii, stands 20 stories tall and has blades the length of a football field.

5. An average wind speed of 14 miles per hour is needed to convert wind energy into electricity.

6. One wind turbine can produce enough electricity to power up to 300 homes.

Solar power

1. More than 10,000 homes in the United States are powered entirely by solar energy.

2. Enough sunlight falls on the earth’s surface every hour to meet world energy demand for an entire year.

3. Silicon from just one ton of sand, used in photovoltaic cells, could produce as much electricity as burning 500,000 tons of coal.

4. In the 1830s, the British astronomer John Herschel used a solar collector box to cook food during an expedition to Africa.

5. Albert Einstein won the Nobel Prize in 1921 for his experiments with solar power and photovoltaics.

6. The largest Concentrated solar power (CSP) solar power plant is in the world located in the Mojave Desert of California.

7. The largest photovoltaic (PV) solar power plant in the world is located in Golmud Solar Park in China.