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ENV Sci 15 Lecture 14 Energy Update! Energy Update! Homework Help Homework Help Terra and Luna Terra and Luna.

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Presentation on theme: "ENV Sci 15 Lecture 14 Energy Update! Energy Update! Homework Help Homework Help Terra and Luna Terra and Luna."— Presentation transcript:

1 ENV Sci 15 Lecture 14 Energy Update! Energy Update! Homework Help Homework Help Terra and Luna Terra and Luna

2 Wind Farm Bird Deaths vs Fossil Fuel & Nuclear Power Bird Deaths killer-study-finds-cats-kill-billions-of-animals Wind farms killed about 573,000 birds in the U.S. last year, according to the Wildlife Society.killed “In 2002, the U.S. Fish & Wildlife Service estimated that communication towers kill 4 million to 5 million per year, cars kill roughly 60 million, cats kill hundreds of millions,” Amy Grace, a wind industry analyst for Bloomberg New Energy Finance, said today in by .estimatedAmy Grace The Avian and Wildlife Costs of Fossil Fuels and Nuclear Power Benjamin K. Sovacool

3 five-striking-wave-and-tidal-energy-concepts/ A serpentine power-generation device from Pelamis is set to be deployed in the United Kingdom and Portugal. The constantly churning oceans that cover most of the Earth offer an inexhaustible source of clean energy. The amount of recoverable energy embedded along the continental shelf of the United States, for example, amounts to almost a third of all the electricity the country uses in one year, according to estimates from the Electric Power Research Institute, "It's emission-free power and it's located close to where most of the population lives," said Sean O'Neill, president of the Gaithersburg, M-based Ocean Renewable Energy Coalition (OREC). Five Striking Concepts for Harnessing the Sea's Power Sea "snakes," special buoys, and mechanical carpets are aimed at making wave energy viable

4 Regions with the greatest geothermal energy potential, indicated in darker gray, tend to be located along geological plate boundaries.

5 Geothermal gradient in the continental United States. Note the preponderance of geothermal resources in the western states.

6 Bathers enjoy geothermally heated waters in Iceland’s Blue Lagoon.

7 Geothermal hot water melts snow from walkways in Klamath Falls, Oregon. An antifreeze solution heated with water from geothermal wells first passes through buildings in the city’s central district, then through sub-walkway tubing.

8 Essential features of a geothermal power plant using steam from a vapor-dominated geothermal resource.

9 A geothermal power plant at Geysers, California.

10 Binary-cycle geothermal power plant at Mammoth Lakes, California. The plant transfers heat from geothermal water at 170°C to its working fluid, isopentane, which boils at 28°C. Four separate units produce a total of 40 MW of electric power. The plant was designed to blend with its scenic surroundings, and the closed-loop binary cycle minimizes emissions.

11 Closed-loop ground-source heat-pump system using buried pipes.

12 Tides result from the variation in the Moon’s gravity (arrows). In an ideal ocean-covered Earth, there would be two tidal bulges on opposite sides of the planet. Bulges shown are greatly exaggerated. What causes the tides in the ocean?

13 Canada’s Bay of Fundy has the world’s highest tides. Shown here are Hopewell Rocks, photographed at low and high tide.

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15 An undersea turbine for tidal power generation.

16 This snakelike device generates 750 kW of electrical power as it flexes in the ocean waves. “Wave farms” consisting of several of these units are linked to the shore with a single cable laid on the sea floor.

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