Unit1 introduction to energy and power

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INTRODUCTION TO ENERGY AND POWER INS J.BAU Departament de Tecnologia

Goals 2

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What is energy?

What is power?

What is electricity?  Current,

voltage, resistance, and power  What are the relationships between these parameters?

Energy 3

So, everyone keeps talking about clean energy.

Image 1 From: The Breakthrough Institute, CA URL: http://thebreakthrough.org/blog/2007/08/in_love_wit h_the_sun.shtml

What is energy, anyways?

Energy 4

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Energy, simply put, is the ability to do work  Energy

must be controlled to do work effectively  Energy is most commonly measured in joules, calories, British thermal unit (Btu), and kWh  Kinetic, potential, thermal, chemical, electrical, nuclear

Image 2 From: Crunch Gear URL: http://www.crunchgear.com/2009/04/0 3/ibm-could-buy-sun/

Image 3 From: American Feast's Sustainable Food Blog URL: http://blog.americanfeast.com/2009/08/missour i_wind_farm_draws_visit.html

Image 4 From: HubPages, Inc. URL: http://hubpages.com/hub/MonsterEnergy-Drink

Power vs. Energy 5

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Power, like energy, is a measure of ability to do work, but it depends on time.  Power

is how much energy we can deliver in a certain amount of time  Units include watts and horsepower (HP).

Image 5 From: Parents URL: http://www.parents.com/kids/education/reading/playdatewith-a-purpose-downloads/

Image 6 From: Dream Road URL: http://www.dreamroad.us/bugatti-veyron-fastest-car-in-theworld/

Power vs. Energy 6

Which uses more power during its formation: a volcano or a mountain?

Image 7 From: Do Something.org URL: http://www.dosomething.org/tipsandtools/11-facts-about-volcanoes

Thrust SSC

Image 8 From: Top Wallpapers URL: http://www.jamwallpapers.com/wpcontent/uploads/2010/09/Rocky-Mountains-3.jpg

Shuttle Transporter

Power 7

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Power is simply Energy/Time

P = E/t How can we increase power?