{"id":105059,"date":"2021-12-10T05:04:44","date_gmt":"2021-12-09T23:34:44","guid":{"rendered":"https:\/\/www.vallamai.com\/?p=105059"},"modified":"2021-12-09T14:37:46","modified_gmt":"2021-12-09T09:07:46","slug":"%e0%ae%90%e0%ae%b0%e0%af%8b%e0%ae%aa%e0%af%8d%e0%ae%aa%e0%ae%bf%e0%ae%af-%e0%ae%a8%e0%ae%be%e0%ae%9f%e0%af%81%e0%ae%95%e0%ae%b3%e0%af%81%e0%ae%95%e0%af%8d%e0%ae%95%e0%af%81-%e0%ae%b8%e0%ae%b9%e0%ae%be","status":"publish","type":"post","link":"https:\/\/www.vallamai.com\/?p=105059","title":{"rendered":"\u0b90\u0bb0\u0bcb\u0baa\u0bcd\u0baa\u0bbf\u0baf \u0ba8\u0bbe\u0b9f\u0bc1\u0b95\u0bb3\u0bc1\u0b95\u0bcd\u0b95\u0bc1 \u0bb8\u0bb9\u0bbe\u0bb0\u0bbe \u0b9a\u0bc2\u0bb0\u0bbf\u0baf\u0b95\u0bcd\u0b95\u0ba4\u0bbf\u0bb0\u0bcd \u0bae\u0bbf\u0ba9\u0bcd\u0b9a\u0bbe\u0bb0\u0bae\u0bcd"},"content":{"rendered":"

\u0b9a\u0bbf. \u0b9c\u0bc6\u0baf\u0baa\u0bbe\u0bb0\u0ba4\u0ba9\u0bcd,<\/span> \u0b95\u0ba9\u0b9f\u0bbe.<\/strong><\/p>\n

\n

\"Map<\/p>\n

The Sahara is the largest hot desert on earth, pretty much making up the entire top half of Africa. It\u2019s a sunbaked mass of some 3.6 million square miles that are easily identifiable from outer space. It\u2019s a place of few clouds and harsh heat. In fact, where there is water, it evaporates at the quickest rate anywhere on earth. There is sand almost everywhere, and it draws heat immensely. Ground temperatures often surpass 170 degrees F [ 77 degree C ] in the Sahara, warranting special shoes or, better still, a trusty camel.<\/p>\n

\"Diagram<\/p>\n

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\u0bae\u0bca\u0bb0\u0bbe\u0b95\u0bcd\u0b95\u0bcb \u0ba8\u0bbe\u0b9f\u0bc1 \u0b92\u0ba9\u0bcd\u0bb1\u0bc1\u0ba4\u0bbe\u0ba9\u0bcd [1400 MW or 2100 MW Capacity Under Sea Cable Link ] \u0b90\u0bb0\u0bcb\u0baa\u0bcd\u0baa\u0bbe\u0bb5\u0bc1\u0b9f\u0ba9\u0bcd [\u0bb8\u0bcd\u0baa\u0bc6\u0baf\u0bbf\u0ba9\u0bcd] 9 \u0bae\u0bc8\u0bb2\u0bcd (15 km) \u0ba8\u0bc0\u0ba3\u0bcd\u0b9f \u0b95\u0b9f\u0bb2\u0b9f\u0bbf \u0bae\u0bbf\u0ba9\u0bcd\u0bb5\u0b9f\u0ba4\u0bcd \u0ba4\u0bca\u0b9f\u0bb0\u0bcd\u0baa\u0bc1 \u0bb5\u0bc8\u0ba4\u0bcd\u0ba4\u0bc1\u0bb3\u0bcd\u0bb3\u0ba4\u0bc1. \u0bae\u0bc1\u0ba4\u0bb2\u0bcd \u0b9a\u0bc2\u0bb0\u0bbf\u0baf\u0b95\u0bcd\u0b95\u0ba4\u0bbf\u0bb0\u0bcd \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0bae\u0bcd 2015 \u0b87\u0bb2\u0bcd \u0b87\u0baf\u0b99\u0bcd\u0b95\u0ba4\u0bcd \u0ba4\u0bc1\u0bb5\u0b99\u0bcd\u0b95\u0bbf\u0baf\u0ba4\u0bc1. 2017 \u0b87\u0bb2\u0bcd 5750 GWh \u0bae\u0bbf\u0ba9\u0bcd\u0ba9\u0bbe\u0bb1\u0bcd\u0bb1\u0bb2\u0bcd \u0bb8\u0bcd\u0baa\u0bc6\u0baf\u0bbf\u0ba9\u0bcd \u0bae\u0bca\u0bb0\u0bbe\u0b95\u0bcd\u0b95\u0bcb\u0bb5\u0bc1\u0b95\u0bcd\u0b95\u0bc1 \u0b85\u0ba9\u0bc1\u0baa\u0bcd\u0baa\u0bbf\u0baf\u0ba4\u0bc1. \u0b87\u0baa\u0bcd\u0baa\u0bcb\u0ba4\u0bc1 \u0bae\u0bca\u0bb0\u0bbe\u0b95\u0bcd\u0b95\u0bcb \u0bb8\u0bcd\u0baa\u0bc6\u0baf\u0bbf\u0ba9\u0bc1\u0b95\u0bcd\u0b95\u0bc1 \u0b9a\u0bc2\u0bb0\u0bbf\u0baf\u0b95\u0bcd\u0b95\u0ba4\u0bbf\u0bb0\u0bcd \u0bae\u0bbf\u0ba9\u0bcd\u0b9a\u0b95\u0bcd\u0ba4\u0bbf \u0b85\u0ba9\u0bc1\u0baa\u0bcd\u0baa\u0bc1\u0bae\u0bcd \u0b95\u0bbe\u0bb2\u0bae\u0bcd \u0bb5\u0ba8\u0bcd\u0ba4\u0bc1\u0bb5\u0bbf\u0b9f\u0bcd\u0b9f\u0ba4\u0bc1.<\/p>\n

\u0ba4\u0bbf\u0b9f\u0bcd\u0b9f\u0bae\u0bbf\u0b9f\u0bcd\u0b9f \u0b90\u0ba8\u0bcd\u0ba4\u0bc1 \u0b9a\u0bc2\u0bb0\u0bbf\u0baf\u0b95\u0bcd\u0b95\u0ba4\u0bbf\u0bb0\u0bcd \u0bae\u0bbf\u0ba9\u0bcd\u0b9a\u0b95\u0bcd\u0ba4\u0bbf \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0b99\u0bcd\u0b95\u0bb3\u0bc1\u0bb3\u0bcd \u0bae\u0bc1\u0ba4\u0bb2\u0bbe\u0b95 \u0b92\u0ba9\u0bcd\u0bb1\u0bc1 500 MW \u0baf\u0bc2\u0ba9\u0bbf\u0b9f\u0bcd \u0bae\u0bca\u0bb0\u0bbe\u0b95\u0bcd\u0b95\u0bcb \u0ba4\u0bc6\u0ba9\u0bcd \u0baa\u0b95\u0bc1\u0ba4\u0bbf\u0baf\u0bbf\u0bb2\u0bcd \u0b89\u0bb3\u0bcd\u0bb3 \u0b93\u0bb0\u0b9f\u0bcd\u0bb8\u0bbe\u0b9a\u0bbe\u0b9f\u0bcd [Ouratzazate] \u0ba8\u0b95\u0bb0\u0bbf\u0bb2\u0bcd \u0b95\u0b9f\u0bcd\u0b9f\u0baa\u0bcd\u0baa\u0b9f \u0b89\u0bb3\u0bcd\u0bb3\u0ba4\u0bc1. 2013 \u0bae\u0bc7 \u0bae\u0bbe\u0ba4\u0bae\u0bcd 10 \u0b87\u0bb2\u0bcd \u0b95\u0b9f\u0bcd\u0b9f\u0bc1\u0bae\u0bbe\u0ba9\u0bae\u0bcd \u0b86\u0bb0\u0bae\u0bcd\u0baa\u0bae\u0bbe\u0ba9\u0ba4\u0bc1. \u0ba4\u0bbf\u0b9f\u0bcd\u0b9f\u0bae\u0bcd \u0bae\u0bc1\u0b95\u0bcd\u0b95\u0b9f\u0bcd\u0b9f\u0baa\u0bcd \u0baa\u0bcb\u0b95\u0bcd\u0b95\u0bbf\u0bb2\u0bcd [160 MW \u0b9a\u0bc2\u0bb0\u0bbf\u0baf\u0b95\u0bcd\u0b95\u0ba4\u0bbf\u0bb0\u0bcd \u0b95\u0bc1\u0bb5\u0bbf\u0baa\u0bcd\u0baa\u0bc1 \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0bae\u0bcd, 200 MW \u0bb5\u0bbf\u0bb0\u0bbf\u0bb5\u0bc1 \u0bb5\u0b9f\u0bcd\u0b9f \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0bae\u0bcd & 150 MW \u0b9a\u0bc2\u0bb0\u0bbf\u0baf \u0b85\u0b9f\u0bc1\u0baa\u0bcd\u0baa\u0bc1 \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0bae\u0bcd] \u0ba8\u0bbf\u0bb1\u0bc1\u0bb5\u0b95\u0bae\u0bcd \u0b86\u0ba9\u0ba4\u0bc1. [Noor 1 (160 MW Concentrated Solar Power Plant), Noor 2 (200 MW Parabolic Mirror Plant), Noor 3 (150 MW Solar Trough Plant ]. \u0baa\u0bc1\u0ba4\u0bc1 \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0b99\u0bcd\u0b95\u0bb3\u0bbf\u0bb2\u0bcd \u0baa\u0baf\u0ba9\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0bb5\u0bbf\u0bb0\u0bbf \u0bb5\u0bb3\u0bc8\u0bb5\u0bc1\u0b9a\u0bcd \u0b9a\u0bc2\u0bb0\u0bbf\u0baf \u0b8e\u0ba4\u0bbf\u0bb0\u0bcd \u0b92\u0bb3\u0bbf\u0b95\u0bcd \u0b95\u0ba3\u0bcd\u0ba3\u0bbe\u0b9f\u0bbf\u0ba4\u0bcd \u0ba4\u0b9f\u0bcd\u0b9f\u0bc1\u0b95\u0bb3\u0bcd [Solar Parabolic Mirrors] 12 \u0bae\u0bc0\u0b9f\u0bb0\u0bcd [39 \u0b85\u0b9f\u0bbf] \u0b89\u0baf\u0bb0\u0bae\u0bcd \u0b89\u0bb3\u0bcd\u0bb3\u0bb5\u0bc8. \u0b9a\u0bc2\u0bb0\u0bbf\u0baf \u0bb5\u0bc6\u0baa\u0bcd\u0baa\u0ba4\u0bcd\u0ba4\u0bc8 \u0b95\u0bc1\u0bb5\u0bbf\u0ba4\u0bcd\u0ba4\u0bc1 \u0b89\u0bb1\u0bbf\u0b9e\u0bcd\u0b9a\u0bc1\u0bae\u0bcd \u0ba4\u0bbf\u0bb0\u0bb5\u0b95\u0bcd \u0b95\u0bc1\u0bb4\u0bb2\u0bcd\u0b95\u0bb3\u0bcd 390 \u0b9f\u0bbf\u0b95\u0bbf\u0bb0\u0bbf \u0b9a\u0bc6\u0bb2\u0bcd\u0b9a\u0bbf\u0baf\u0bb8\u0bcd [740 \u0b9f\u0bbf\u0b95\u0bbf\u0bb0\u0bbf \u0baa\u0bbe\u0bb0\u0ba9\u0bcd\u0bb9\u0bc0\u0b9f\u0bcd ] \u0b85\u0bb3\u0bb5\u0bc0\u0b9f\u0bcd\u0b9f\u0bbf\u0bb2\u0bcd \u0b93\u0b9f\u0bc1\u0baa\u0bb5\u0bc8. \u0b85\u0ba8\u0bcd\u0ba4 \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0b99\u0bcd\u0b95\u0bb3\u0bcd \u0ba8\u0bbe\u0bb3\u0bcd \u0b92\u0ba9\u0bcd\u0bb1\u0bc1\u0b95\u0bcd\u0b95\u0bc1 20 \u0bae\u0ba3\u0bbf \u0ba8\u0bc7\u0bb0\u0bae\u0bcd \u0bae\u0bbf\u0ba9\u0bcd\u0b9a\u0b95\u0bcd\u0ba4\u0bbf \u0b85\u0ba9\u0bc1\u0baa\u0bcd\u0baa\u0bc1\u0baa\u0bb5\u0bc8. \u0ba8\u0bc2\u0bb0\u0bcd 1 [Noor 1] \u0b9a\u0bc2\u0bb0\u0bbf\u0baf\u0b95\u0bcd\u0b95\u0ba4\u0bbf\u0bb0\u0bcd \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0ba4\u0bcd\u0ba4\u0bbf\u0bb2\u0bcd 500,000 \u0bb5\u0bb3\u0bc8\u0bb5\u0bc1\u0b95\u0bcd \u0b95\u0ba3\u0bcd\u0ba3\u0bbe\u0b9f\u0bbf\u0b95\u0bb3\u0bcd [Parabolic Mirrors] 800 \u0b85\u0ba3\u0bbf \u0bb5\u0b95\u0bc1\u0baa\u0bcd\u0baa\u0bbf\u0bb2\u0bcd \u0b85\u0bae\u0bc8\u0b95\u0bcd\u0b95\u0baa\u0bcd \u0baa\u0b9f\u0bcd\u0b9f\u0bc1\u0bb3\u0bcd\u0bb3\u0ba9. \u0b87\u0ba8\u0bcd\u0ba4 \u0bae\u0bbe\u0b9f\u0bb2\u0bcd \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0bae\u0bcd \u0b85\u0bae\u0bc6\u0bb0\u0bbf\u0b95\u0bcd\u0b95\u0bbe \u0b95\u0bbe\u0bb2\u0bbf\u0b83\u0baa\u0bcb\u0bb0\u0bcd\u0ba9\u0bbf\u0baf\u0bbe \u2013 \u0ba8\u0bc6\u0bb5\u0bc7\u0b9f\u0bbe, \u0b8e\u0bb2\u0bcd\u0bb2\u0bc8\u0baa\u0bcd \u0baa\u0b95\u0bcd\u0b95\u0bae\u0bcd \u0bae\u0bca\u0bb9\u0bbe\u0bb5\u0bbf \u0baa\u0bbe\u0bb2\u0bc8 \u0bb5\u0ba9\u0ba4\u0bcd\u0ba4\u0bbf\u0bb2\u0bc1\u0bae\u0bcd \u0b89\u0bb3\u0bcd\u0bb3\u0ba4\u0bc1. 2.2 \u0baa\u0bbf\u0bb2\u0bcd\u0bb2\u0bbf\u0baf\u0ba9\u0bcd \u0b9a\u0bc6\u0bb2\u0bb5\u0bbf\u0bb2\u0bcd 400 MW \u0ba4\u0bbf\u0bb1\u0ba9\u0bbf\u0bb2\u0bcd \u0b89\u0bb0\u0bc1\u0bb5\u0bbe\u0b95\u0bc1\u0bae\u0bcd \u201c\u0b87\u0bb5\u0bbe\u0ba9\u0bcd\u0baa\u0bbe\u201d [IVANPAH ] \u0b9a\u0bc2\u0bb0\u0bbf\u0baf\u0b95\u0bcd\u0b95\u0ba4\u0bbf\u0bb0\u0bcd \u0bae\u0bbf\u0ba9\u0bcd\u0b9a\u0bbe\u0bb0 \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0bae\u0bcd 5 \u0b9a\u0ba4\u0bc1\u0bb0 \u0bae\u0bc8\u0bb2\u0bcd \u0baa\u0bb0\u0baa\u0bcd\u0baa\u0bbf\u0bb2\u0bcd, \u0ba8\u0bbe\u0bb1\u0bcd\u0baa\u0ba4\u0bc1 \u0bae\u0bc2\u0bb5\u0b9f\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0b95\u0bcd \u0b95\u0bcb\u0baa\u0bc1\u0bb0\u0ba4\u0bcd\u0ba4\u0bbf\u0bb2\u0bcd \u0b86\u0baf\u0bbf\u0bb0\u0b95\u0bcd \u0b95\u0ba3\u0b95\u0bcd\u0b95\u0bbe\u0ba9 \u0b9a\u0bc2\u0bb0\u0bbf\u0baf\u0b95\u0bcd \u0b95\u0ba3\u0bcd\u0ba3\u0bbe\u0b9f\u0bbf\u0b95\u0bb3\u0bbe\u0bb2\u0bcd \u0b87\u0baf\u0b99\u0bcd\u0b95\u0bbf \u0bb5\u0bb0\u0bc1\u0b95\u0bbf\u0bb1\u0ba4\u0bc1. \u0b87\u0bb5\u0bbe\u0ba9\u0bcd\u0baa\u0bbe \u0b9a\u0bc2\u0bb0\u0bbf\u0baf\u0b95\u0bcd \u0b95\u0ba4\u0bbf\u0bb0\u0bcd \u0ba8\u0bbf\u0bb2\u0baf\u0bae\u0bcd140,000 \u0b87\u0bb2\u0bcd\u0bb2\u0b99\u0bcd\u0b95\u0bb3\u0bc1\u0b95\u0bcd\u0b95\u0bc1 \u0bae\u0bbf\u0ba9\u0bcd\u0b9a\u0b95\u0bcd\u0ba4\u0bbf \u0baa\u0bb0\u0bbf\u0bae\u0bbe\u0bb1\u0bc1\u0bae\u0bcd \u0ba4\u0bbf\u0bb1\u0bae\u0bcd \u0b89\u0b9f\u0bc8\u0baf\u0ba4\u0bc1.<\/p>\n

How Solar Thermal Power Plant Works
\nBy: Maria Trimarchi<\/p>\n

\"Solar<\/p>\n

Solar thermal power keeps chugging even when the sun goes down. See more\u00a0pictures of green living.AP PHOTO\/SKYFUEL, JACK DEMPSEY<\/p>\n

Most of us don\u2019t think much about where our electricity comes from, only that it\u2019s available and plentiful. Electricity generated by burning fossil fuels such as coal, oil and natural gas, emits carbon dioxide, nitrogen oxides and sulfur oxides \u2014 gases scientists believe contribute to climate change. Solar thermal (heat) energy is a carbon-free, renewable alternative to the power we generate with fossil fuels like coal and gas. This isn\u2019t a thing of the future, either. Between 1984 and 1991, the United States built nine such plants in California\u2019s Mojave Desert, and today they continue to provide a combined capacity of 354 megawatts annually, power used in 500,000 Californian homes [source: Hutchinson]. Reliable power, at that. In 2008 when six days of peak demand buckled the power grid and brought electricity outages in California, those solar thermal plants continued to produce at 110 percent capacity [source:\u00a0Kanellos].<\/p>\n

Wondering where the technology\u2019s been since then? In the 1990s when prices of natural gas dropped, so did interest in solar thermal power. Today, though, the technology is poised for a comeback. It\u2019s estimated by the U.S. National Renewable Energy Laboratories that solar thermal power could provide hundreds of gigawatts of electricity, equal to more than 10 percent of demand in the United States [source: LaMonica].<\/p>\n

Shake the image of solar panels from your head \u2014 that kind of demand is going to require power plants. There are two main ways of generating energy from the sun. Photovoltaic (PV) and concentrating solar thermal (CST), also known as concentrating solar power (CSP) technologies.<\/p>\n

PV converts sunlight directly into electricity. These solar cells are usually found powering devices such as watches, sunglasses and backpacks, as well as providing power in remote areas.<\/p>\n

Solar thermal technology is large-scale by comparison. One big difference from PV is that solar thermal power plants generate electricity indirectly. Heat from the sun\u2019s rays is collected and used to heat a fluid. The steam produced from the heated fluid powers a generator that produces electricity. It\u2019s similar to the way fossil fuel-burning power plants work except the steam is produced by the collected heat rather than from the combustion of fossil fuels.Contents<\/p>\n

    \n
  1. Solar Thermal Systems<\/li>\n
  2. Solar Thermal Heat<\/li>\n<\/ol>\n

     <\/p>\n

    Solar Thermal Systems<\/p>\n

    \"Parabolic<\/p>\n

    Parabolic troughs, like these used in Colorado, concentrate the sun\u2019s energy to great temperatures.AP PHOTO\/SKYFUEL, JACK DEMPSEY<\/p>\n

    There are two types of solar thermal systems: passive and active. A passive system requires no equipment, like when heat builds up inside your car when it\u2019s left parked in the sun. An active system requires some way to absorb and collect solar radiation and then store it.<\/p>\n

    Solar thermal power plants are active systems, and while there are a few types, there are a few basic similarities: Mirrors reflect and concentrate sunlight, and receivers collect that solar energy and convert it into heat energy. A generator can then be used to produce electricity from this heat energy.<\/p>\n

    The most common type of solar thermal power plants, including those plants in California\u2019s Mojave Desert, use a parabolic trough design to collect the sun\u2019s radiation. These collectors are known as linear concentrator systems, and the largest are able to generate 80 megawatts of electricity [source:\u00a0U.S. Department of Energy]. They are shaped like a half-pipe you\u2019d see used for snowboarding or skateboarding, and have linear, parabolic-shaped reflectors covered with more than 900,000 mirrors that are north-south aligned and able to pivot to follow the sun as it moves east to west during the day. Because of its shape, this type of plant can reach operating temperatures of about 750 degrees F (400 degrees C), concentrating the sun\u2019s rays at 30 to 100 times their normal intensity onto heat-transfer-fluid or water\/steam filled pipes [source:\u00a0Energy Information Administration]. The hot fluid is used to produce steam, and the steam then spins a turbine that powers a generator to make electricity.<\/p>\n

    While parabolic trough designs can run at full power as solar energy plants, they\u2019re more often used as a solar and fossil fuel hybrid, adding fossil fuel capability as backup.<\/p>\n

    Solar power tower systems are another type of solar thermal system. Power towers rely on thousands of heliostats, which are large, flat sun-tracking mirrors, to focus and concentrate the sun\u2019s radiation onto a single tower-mounted receiver. Like parabolic troughs, heat-transfer fluid or water\/steam is heated in the receiver (power towers, though, are able to concentrate the sun\u2019s energy as much as 1,500 times), eventually converted to steam and used to produce electricity with a turbine and generator.<\/p>\n

    Power tower designs are still in development but could one day be realized as grid-connected power plants producing about 200 megawatts of electricity per tower.<\/p>\n

    A third system is the solar dish\/engine. Compared to the parabolic trough and power towers, dish systems are small producers (about 3 to 25 kilowatts). There are two main components: the solar concentrator (the dish) and the power conversion unit (the engine\/generator). The dish is pointed at and tracks the sun and collects solar energy; it\u2019s able to concentrate that energy by about 2,000 times. A thermal receiver, a series of tubes filled with a cooling fluid (such as hydrogen or helium), sits between the dish and the engine. It absorbs the concentrated solar energy from the dish, converts it to heat and sends that heat to the engine where it becomes electricity.<\/p>\n

    Solar Thermal Heat<\/p>\n

    Solar thermal systems are a promising renewable energy solution \u2014 the sun is an abundant resource. Except when it\u2019s nighttime. Or when the sun is blocked by cloud cover. Thermal energy storage (TES) systems are high-pressure liquid storage tanks used along with a solar thermal system to allow plants to bank several hours of potential electricity. Off-peak storage is a critical component to the effectiveness of solar thermal power plants.<\/p>\n

    Three primary TES technologies have been tested since the 1980s when the first solar thermal power plants were constructed: a two-tank direct system, a two-tank indirect system and a single-tank thermocline system.<\/p>\n

    In a two-tank direct system, solar thermal energy is stored right in the same heat-transfer fluid that collected it. The fluid is divided into two tanks, one tank storing it at a low temperature and the other at a high temperature. Fluid stored in the low temperature tank runs through the power plant\u2019s solar collector where it\u2019s reheated and sent to the high temperature tank. Fluid stored at a high temperature is sent through a heat exchanger that produces steam, which is then used to produce electricity in the generator. And once it\u2019s been through the heat exchanger, the fluid then returns to the low temperature tank.<\/p>\n

    A two-tank indirect system functions basically the same as the direct system except it works with different types of heat-transfer fluids, usually those that are expensive or not intended for use as storage fluid. To overcome this, indirect systems pass low temperature fluids through an additional heat exchanger.<\/p>\n

    Unlike the two-tank systems, the single-tank thermocline system stores thermal energy as a solid, usually silica sand. Inside the single tank, parts of the solid are kept at low to high temperatures, in a temperature gradient, depending on the flow of fluid. For storage purposes, hot heat-transfer fluid flows into the top of the tank and cools as it travels downward, exiting as a low temperature liquid. To generate steam and produce electricity, the process is reversed.<\/p>\n

    Solar thermal systems that use mineral oil or molten salt as the heat-transfer medium are prime for TES, but unfortunately without further research, systems that run on water\/steam aren\u2019t able to store thermal energy. Other advancements in heat-transfer fluids include research into alternative fluids, using phase-change materials and novel thermal storage concepts all in an effort to reduce storage costs and improve performance and efficiency.<\/p>\n

    Solar Thermal Greenhouses<\/strong><\/p>\n

    \"Lisa<\/p>\n

    Lisa Kivirist and John Ivanko stand next to a solar thermal system that heats a greenhouse at their bed-and-breakfast.AP PHOTO\/ANDY MANIS<\/p>\n

    The idea of using thermal mass materials \u2014 materials that have the capacity to store heat \u2014 to store solar energy is applicable to more than just large-scale solar thermal power plants and storage facilities. The idea can work in something as commonplace as a greenhouse.<\/p>\n

    All greenhouses trap solar energy during the day, usually with the benefit of south-facing placement and a sloping roof to maximize sun exposure. But once the sun goes down, what\u2019s a grower to do? Solar thermal greenhouses are able to retain that thermal heat and use it to warm the greenhouse at night.<\/p>\n

    Stones, cement and water or water-filled barrels can all be used as simple, passive thermal mass materials (heat sinks), capturing the sun\u2019s heat during the day and radiating it back at night.<\/p>\n

    Bigger aspirations? Apply the same ideas used in solar thermal power plants (although on a much smaller level) and you\u2019re on your way to year-round growing. Solar thermal greenhouses, also called active solar greenhouses, require the same basics as any other solar thermal system: a solar collector, a water storage tank, tubing or piping (buried in the floor), a pump to move the heat-transfer medium (air or water) in the solar collector to storage and electricity (or another power source) to power the pump.<\/p>\n

    In one scenario, air that collects in the peak of the greenhouse roof is drawn down through pipes and under the floor. During the day, this air is hot and warms the ground. At night, cool air is drawn down into the pipes. The warm ground heats the cool air, which in turn heats the greenhouse. Alternatively, water is sometimes used as the heat-transfer medium. Water is collected and solar heated in an external storage tank and then pumped through the pipes to warm the greenhouse.<\/p>\n

    Solar Thermal Chimneys<\/strong><\/p>\n

    \"Solar<\/p>\n

    Solar thermal power has great potential because the technology is already all there.GUANG NIU\/GETTY IMAGES<\/p>\n

    Just as solar thermal greenhouses are a way to apply solar thermal technologies to an everyday need, solar thermal chimneys, or thermal chimneys, also capitalize on thermal mass materials. Thermal chimneys are passive solar ventilation systems, which means they are nonmechanical. Examples of mechanical ventilation include whole-house ventilation that uses fans and ducts to exhaust stale air and supply fresh air. Through convective cooling principles, thermal chimneys allow cool air in while pushing hot air from the inside out. Designed based on the fact that hot air rises, they reduce unwanted heat during the day and exchange interior (warm) air for exterior (cool) air.<\/p>\n

    Thermal chimneys are typically made of a black, hollow thermal mass with an opening at the top for hot air to exhaust. Inlet openings are smaller than exhaust outlets and are placed at low to medium height in a room. When hot air rises, it escapes through the exterior exhaust outlet, either to the outside or into an open stairwell or atria. As this happens, an updraft pulls cool air in through the inlets.<\/p>\n

    In the face of global warming, rising fuel costs and an ever-growing demand for energy, energy needs are expected to increase by nearly the equivalent of 335 million barrels of oil per day, mostly for electricity [source: Meisen]. Whether big or small, on or off the grid, one of the great things about solar thermal power is that it exists right now, no waiting. By concentrating solar energy with reflective materials and converting it into electricity, modern solar thermal power plants, if adopted today as an indispensable part of energy generation, may be capable of sourcing electricity to more than 100 million people in the next 20 years [source: Brakmann]. All from one big renewable resource: the sun.<\/p>\n

    \"Scientists\"\"\"\"<\/p>\n

    Largest solar power plants<\/p>\n

    Morocco Renewable Energy solar projects to be installed between now and 2030<\/p>\n\n\n\n\n\n\n\n\n\n
    NAME<\/th>\nOUTPUT (MW)<\/th>\nLOCATION<\/th>\nTECHNOLOGY<\/th>\nSTATUS<\/th>\nNOTES<\/th>\n<\/tr>\n<\/thead>\n
    Ain Beni Mathar<\/td>\n20<\/td>\nAin Bni Mathar<\/td>\nParabolic trough<\/td>\ncomplete<\/td>\nAlso runs on fossil fuels (Gas)<\/td>\n<\/tr>\n
    Noor I<\/td>\n160<\/td>\nDr\u00e2a-Tafilalet<\/td>\nParabolic trough<\/td>\ncomplete<\/td>\nPart of\u00a0Ouarzazate Solar Power Station<\/td>\n<\/tr>\n
    Noor II<\/td>\n200<\/td>\nDr\u00e2a-Tafilalet<\/td>\nParabolic trough<\/td>\ncomplete<\/td>\nPart of\u00a0Ouarzazate Solar Power Station<\/td>\n<\/tr>\n
    Noor III<\/td>\n150<\/td>\nDr\u00e2a-Tafilalet<\/td>\nsolar power tower<\/td>\ncomplete<\/td>\nPart of\u00a0Ouarzazate Solar Power Station<\/td>\n<\/tr>\n
    Noor IV<\/td>\n72<\/td>\nDr\u00e2a-Tafilalet<\/td>\nPhotovoltaics\u00a0with tracking<\/td>\ncomplete<\/td>\nPart of\u00a0Ouarzazate Solar Power Station<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    PLANNED<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
    NAME<\/th>\nOUTPUT<\/th>\nLOCATION<\/th>\nTECHNOLOGY<\/th>\nSTATUS<\/th>\nNOTES<\/th>\n<\/tr>\n<\/thead>\n
    Sebkhate Tah<\/td>\n500MW<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
    Foum Al-Oued<\/td>\n500MW<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
    Boujdour<\/td>\n100 MW<\/td>\n<\/td>\n<\/td>\nPlanned<\/td>\n<\/td>\n<\/tr>\n
    Noor Midelt<\/td>\n800 MW<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
    Noor PV II<\/td>\n800MW<\/td>\nTaroudant, Kal\u00e2at Seraghna, Beja\u00e2d, Guercif, El Hajeb<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
    Noor-Tafilalet<\/td>\n120 MW<\/td>\nZagora, Erfoud and Missour<\/td>\n<\/td>\nPlanned<\/td>\n<\/td>\n<\/tr>\n
    Noor Atlas<\/td>\n800MW<\/td>\nTata\/Tahla\/Tan Tan\/Outat El Haj\/Ain Beni Mathar\/Boudnib\/Bouanane\/Boulemane<\/td>\nPhotovoltaics<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
    Noor Argana<\/td>\n200 MW<\/td>\nBoumalne\/Tinghir\/Errhamna\/Essaouira<\/td>\nPhotovoltaics<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \n<\/div>\n","protected":false},"excerpt":{"rendered":"

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