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A device for converting audio or visual signals 开始学习
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A long, narrow, open container, usually U- shaped 开始学习
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A shallow concave vessel, round in shape like a plate 开始学习
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An object that throws back light 开始学习
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An electronic device that changes DC into AC current 开始学习
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A shallow concave vessel, round in shape like a plate 开始学习
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Due to the lack of ........, the riverbed was almost dry. 开始学习
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Electricity that reverses direction at regular intervals 开始学习
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Electricity that flows in only one direction 开始学习
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Formed by lines or forming a line 开始学习
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Here: household electrical devices 开始学习
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Houses with PV systems are always connected to the grid. 开始学习
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Krystaliczne wafle krzemowe 开始学习
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Crystalline Silicon Wafers
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Power grid/ electricity network 开始学习
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Solar photovoltaic panels focus the Sun’s energy on a heat receiver which changes it into mechanical energy, then transformed into thermal electricity. 开始学习
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Solar concentrators are built of cells which contain a semiconductor material. 开始学习
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Produce direct current (DC) which is converted to alternating current (AC) by an inverter so it can be used by appliances in the home 开始学习
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Photovoltaics (PV) cannot convert light directly into electricity. 开始学习
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Rainfall plays a crucial role in the ........ cycle. Without it, no water would collect upstream. 开始学习
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The ... around the tower are focused on the tank of the heat collector, which makes it very hot. 开始学习
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The bigger the dam, the bigger its 开始学习
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The function of the generator is to convert the ........ energy into ........ energy. 开始学习
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The fishing area should be located ........ the river. The water is deeper over there. 开始学习
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The electricity produced in the generator finally feeds the 开始学习
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The high pressure steam produced in the heat exchanger drives the ........ which produces electricity. 开始学习
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The higher the dam, the bigger the ........ head is and, consequently, the more powerful the ........ plant. 开始学习
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The salt in the ........ melts around 200 degrees Celsius and is pumped up the tower. 开始学习
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The ........ must have been blocked because no water was coming out of them. 开始学习
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........ energy of the water in the penstock is changed into ........ energy. 开始学习
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The steam then goes to the ........ where it is turned back into water. 开始学习
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Then the molten salt goes down the tower and is stored in the perfectly insulated ........ 开始学习
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Types of solar concentrators 开始学习
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Linear Fresnel reflectors Parabolic troughs Parabolic dish Central receiver/Heliostats
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Up the tower, in the ........ the salt is heated up to 650 degrees C. 开始学习
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When electricity is needed, the salt leaves the hot salt tank and goes through the ........ where it boils. 开始学习
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We could see the blades of the huge turbine did not ........ as they were supposed to. They did it much too slowly. 开始学习
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a large pipe delivering water from the reservoir to the turbine. Water builds up pressure as it flows through this pipe and its gravitational potential changes into kinetic energy 开始学习
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connected to the turbine by shafts. It starts to spin when the turbine turns and changes its mechanical power into electric energy (giant magnets inside the generator rotate past copper coils, producing alternating current by moving electrons) 开始学习
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holds back water and stores energy in a reservoir (often used as a recreational lake e.g. for water sports) 开始学习
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in the direction of the river’s mouth 开始学习
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kanal odprowadzajacy wode 开始学习
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kanał odprowadzający wodę/ kanał odpływowy 开始学习
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located in the powerhouse. It converts the AC (alternating current) to higher voltage current 开始学习
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obiekty elektrowni wodnej 开始学习
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pipelines taking water away 开始学习
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Odnawialne źródło energii 开始学习
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water strikes and spins the large blades of a turbine, which converts its kinetic energy into mechanical one 开始学习
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the distance that the water falls from the reservoir surface to the turbines 开始学习
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