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471-2004-1-Concentrating collector-Serkan Kapucu

Concentrating solar collectors use mirrors and lenses

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Unformatted text preview: at. Concentrating solar collectors use mirrors and lenses to concentrate and focus sunlight onto a thermal receiver, similar to a boiler tube. The receiver absorbs and converts sunlight into heat. The heat is then transported to a steam generator or engine where it is converted into electricity. There are three main types of concentrating solar power systems: parabolic troughs, dish/engine systems, and central receiver systems. dish/engine These technologies can be used to generate electricity for These a variety of applications, ranging from remote power systems as small as a few kilowatts (kW) up to grid connected applications of 200-350 megawatts (MW) or more. A concentrating solar power system that produces 350 MW of electricity displaces the energy equivalent of 2.3 million barrels of oil [5]. 2.3 4.1. Trough Systems 4.1. These solar collectors use mirrored parabolic troughs to These focus the sun's energy to a fluid-carrying receiver tube located at the focal point of a parabolically curved trough reflector [5].It is shown in the figure 4.1.1 below. reflector Figure 4.1.1 Parabolic trough with mirrored parabolic troughs [10]. The energy from the sun sent to the tube heats oil flowing through the tube, and the heat energy is then used to generate electricity in a conventional steam generator. Many troughs placed in parallel rows are called a "collector field." The troughs in the field are all aligned along a northsouth axis so they can track the sun from east to west during the day, ensuring that the sun is continuously focused on the receiver pipes. Individual trough systems currently can generate about 80 MW of electricity. about Trough designs can incorporate thermal storageTrough setting aside the heat transfer fluid in its hot phase setting allowing for electricity generation several hours into the evening. Currently, all parabolic trough plants are "hybrids," meaning they use fossil fuels to supplement the solar output during periods of l...
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