Energy resources & types

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Information about Energy resources & types
Business & Mgmt

Published on March 9, 2014

Author: TejKiran2

Source: slideshare.net

Description

Environment Business

ENERGY & ENERGY RESOURCES 1

Energy & Energy Resources • Energy & energy resources important to economies – Hunter-gatherer – Agricultural – Industrial 2

Energy & Energy Resources • Sources of energy for the modern industrial economy 3

Energy & Energy Resources • • Energy use related to – Prosperity – Quality of life More energy used: more GNP per capita. Is this correct? – but, Switzerland, Japan, Denmark, Germany have achieved high GNP using less energy than USA 4

How we use Energy • Electrical – lighting (room, street, advertising) – heating & air conditioning – air circulation • Heat • Kinetic. – transportation • cars • trucks • trains • airplanes – residential & commercial buildings – hot water – industrial processes 5

Energy & Economy • Electricity • (In)efficiency: 2nd Law • ~ 75% of energy lost in generation from coal and “stepping down” to household voltage • Inefficient incandescent light bulbs 6

Electrical generation sources – – – – Fossil fuels, 66.6% Nuclear, 15.2% Hydro, 16.0% Renewable, 2.2% 7

Energy Formation • Fossil fuels – Coal – Petroleum • crude oil • tar sands • oil shales – Natural gas 8

Energy Source • Coal – Fossilized plant remains, mostly 250300 Million yr old – Abundant – Enough to last ~200 years at present rate of use 9

Energy & Economy • Coal mining – Subsurface mining • Dangerous to miners – Open cast mining • Destroys surface landscape • Acid drainage 10

Energy & Economy • Electrical generation from coal – Source, quality of coal – Emissions – Ash disposal 11

Energy & Economy • Petroleum • crude oil • tar sands • oil shales • Production • transport • Consumption 12

Energy & Economy • Crude oil refined to: – fuel • gasoline • diesel – lubricants • motor oil, etc. – asphalt paving – plastics • By-products 13

When will we run out of oil? 14

Energy & Economy • Other uses for petroleum: Plastics, solvents, asphalt, rubber 15

Energy & Economy • Natural gas – Clean burning • CO2 • H2O – Difficult & dangerous to store and transport • Pipelines • Liquid natural gas 16

Energy & Economy • Alternatives to fossil fuels – Nuclear energy 17

Energy & Economy • Alternatives to fossil fuels – Nuclear power for electrical generation 18

Energy & Environmental Impact 19

Energy & Economy • Alternatives to fossil fuels – Biomass energy • Wood • Ethanol (ethyl alcohol) • Vegetable oil – Land dedicated to biomass production • Unavailable for food • Nutrient depletion 20

Energy & Economy • Alternatives to fossil fuels – Hydroelectric energy – Dams 21

Energy & Economy • Alternatives to fossil fuels – Wind energy 22

Energy & Economy Solar Energy 23

Energy & Economy • Alternatives to fossil fuels – Hydrogen fuel cells • Used in space capsules, shuttles, International Space Station, since 1960s • Strip hydrogen atoms of electrons – Electrons flow (current) – Protons pass through membrane – Waste = water vapor 24

Energy Conservation • Drive less – Carpool – Mass Transport – Walk, bike • Drive a more efficient car • Use stairs • Recycle • Make home more energy efficient • Buy locally grown food • Buy locally produced goods 25

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