Energy Usage, Resources and Demand. Where does our energy come from?

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Presentation transcript:

Energy Usage, Resources and Demand

Where does our energy come from?

United States 70% Fossil Fuels 20% Nuclear 7% Hydro 3% Renewables

California Natural Gas: 40% Residents/Commercial combined. Monterey Shale formation: San Joaquin Valley 15 billions barrels of oil and gas liquids and natural gas (U.S. EIA 2011) Bent into folds due to seismic activity and sedimentary strata. Not conducive to horizontal drilling like other formations.

Residential Natural Gas Consumption Thousand of Therms Per Year (Mtherms/y)Percentage Water Heating2, % Clothes Dryer % Cooking % Pools and Spas % Space Heating2, % TOTAL6,312100% Residential Natural Gas Consumption, 2012

Transitions: Wood

Peat dung blubber

Coal

Natural Gas

Renewables What do you know about renewables in California?

California and Renewable Energy CA is among the top states in the nation in net electricity generation from renewable resources. One of the nation's leading producers of electricity from conventional hydroelectric power, California is also a leader in net electricity generation from several other renewable energy sources, including solar, geothermal, wind, and biomass.

Wind

Solar – PV and Concentrated PV: Photovoltaic Photo = light Volt = measurement of electricity Sunlight: Photons: bundles of radiant energy. Photons strike a PV cell: reflected, absorbed or transmitted through the cell. Absorbed photons generate energy. Energy is transferred to electrons in the atoms of the solar cell.

Power and Energy What do you know about power and energy? Definitions?

Energy is referred to as the ability to do work. Energy is measured in units called joules, J, or in watt hours. Watt hours (Wh), are a convenient way of measuring electrical energy. One watt hour is equal to a constant one watt supply of power supplied over one hour (3600 seconds). If a bulb is rated at 40watts, in one hour it will use 40 Wh, and in 8 hours it will use 320 Wh of energy. Electric power companies measure the amount of energy supplied to costumers in kilo Power Power is the rate at which energy is supplied (or energy per unit time). Power is measured in watts.

Measurements: Where they got their names André-Marie Ampère was a French physicist and mathematician. The SI unit of measurement of electric current, the ampere, was named after him. Alessandro Giuseppe Antonio Anastasio Volta was an Italian physicist. The SI unit of measurement of electric voltage, the volt, was named after him. Georg Simon Ohm was a German physicist and mathematician. The SI unit of measurement of electric resistance, the ohm, was named after him. James Watt was a Scottish inventor and mechanical engineer. The SI unit of measurement of electric wattage (power), the watt, was named after him.

Wind Energy Lab Experimental Design Variables Questions Hypotheses Methods Cautions: electrical tape/wires

Solar Energy Lab Panels Wires Angles Cars and Competition

Things to consider What determines the amount of energy that wind and solar can generate? Positives? Negatives?