Kamis, 07 April 2011

Solar Cell Energy Alternative in Israel

Solar Power in Israel
Solar power in Israel and the Israeli solar energy industry has a history that dates to the founding of the country. In the 1950s, Levi Yissar developed a solar water heater to help assuage an energy shortage in the new country. 
By 1967 around one in twenty households heated its water with the sun and 50,000 solar heaters had been sold. With the 1970s oil crisis, Harry Zvi Tabor, the father of Israel's solar industry, developed the prototype of the solar water heater now used in over 90% of Israeli homes. Israeli engineers are at the cutting edge of solar energy technology and its solar companies work on projects around the world.

Israel has embraced solar energy. There is no oil on Israeli land and the country's tenuous relations with its oil-rich neighbors has made the search for a stable source of energy a national priority. Israeli innovation and research has advanced solar technology to a degree that it is almost cost-competitive with fossil fuels. Its abundant sun made the country a natural location for the promising technology. The high annual incident solar irradiance in the Negev Desert has spurred an internationally renowned solar research and development industry, with Harry Tabor and David Faiman of the National Solar Energy Center two of its more prominent members. At the end of 2008 a feed-in tariff scheme was approved, which immediately put in motion the building of many residential and commercial solar energy power station projects.

In the 1950s there was a fuel shortage in the new Israeli state, and the government forbade heating water between 10 a.m. and 6 p.m. As the situation worsened, engineer Levi Yissar proposed that instead of the construction of more electrical generation plants, homes should switch to solar water heaters. He built a prototype in his home, and in 1953 he started NerYah Company, Israel's first commercial manufacturer of solar water heaters. By 1967 around one in twenty households heated its water with the sun and 50,000 solar heaters had been sold. However, cheap oil from Iran and from oil fields captured in the Six-Day War made Israeli electricity cheaper and the demand for solar heaters dropped. After the energy crisis in the 1970s, in 1980 the Israeli Knesset passed a law requiring the installation of solar water heaters in all new homes (except high towers with insufficient roof area). As a result, Israel is now the world leader in the use of solar energy per capita (3% of the primary national energy consumption).

As of the early 1990s, all new residential buildings were required by the government to install solar water-heating systems, and Israel's National Infrastructure Ministry estimates that solar panels for water-heating satisfy 4% of the country's total energy demand. Israel and Cyprus are the per-capita leaders in the use of solar hot water systems with over 90% of homes using them.

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