Unit 5 Energy Energy Usage in Agriculture
What is Energy ? • The ability to work
What is a Hydrocarbon? • hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. • found naturally occur in crude oil, where decomposed organic matter provides an abundance of carbon and hydrogen which, when bonded, can catenate to form seemingly limitless chain
Common types of hydrocarbon fuels • Gasoline • Diesel • Natural Gas • Propane • Kerosene • Coal
Another type of energy common to every day life is • Electrical
What is electrical energy used for ? • Lighting and heating homes • Efficient transportation • Modernized irrigation system ( changes in diesel engines to electrical engines) • As a component in internal combustion engines
NuclearEnergy • Heat generated radioactive decay to create steam which turns turbines to drive generators.
Positive Aspects to Nuclear Energy • Less pollution • Cheaper kilowatt cost over a period of time
Alternative energy sources • Biofuel • Biomass • Wind • Solar • Hydropower
Negative Aspects to Nuclear Energy • Heat generated water that has to be cool extensively before re entering the environment • Dangers from radioactive releases • How to properly dispose thewastes
Bio Fuels • Renewable energy from biological sources
Examples of common bio fuels • Bio diesel • Ethanol ( an alcohol product) • Methane gases ( derives from various waste products)
Biomass • Plant matter rich in cellulose • Biomass power- electrical power generated from burning plant matter
Examples of uses for biomass power • Burning of bagasse to create steam to generate energy operate sugarmills • Most common use for biomass is the burning of wood to heat homes and cook.
Wind energy uses • Power of wind used to turn a wind mill to drive pump • Now used to turn turbines to generate electricity
Solar Energy • Conversion of sunlight to electrical energy through the use of solar panels
Hydropower Energy • Moving water used to turn turbines which turns electrical generators • Ex: Toledo Bend Dam
Energy Transformation • Process of transforming one type of energy into another.
Examples of Energy Transformation • Burning a hydrocarbon like natural gas to generate electricity. • Gasoline in an internal combustion engine converting chemical energy into mechanical energy
Internal Combustion Engines • An engine where the combustion happens inside the engine
Examples of Internal combustion engines • Gasoline • Diesel • Propane • Natural Gas ( Methane) • Each engine has modifications due to the types of fuels they use.
For more information or to view how a propane engine runs, use the below link. http://www.youtube.com/watch?v=qthhrhkfz1Q
External Combustion Engines • An engine where the combustion happens outside the engine due to an external source of heat.
How it works ? • External heat + water = steam which is pressurized in a boiler. This pressure either turns a turbine or pushes a piston.
Types of energy use to power external combustion engines • Wood • Any Hydrocarbons (often coal) • Nuclear
Common Flaws / problems with Four cycle gasoline engines • Low engine efficiency • High exhaust emissions • Noise pollution
Common Flaws / problems with Two cycle gasoline engines • Shorter service life • Greater emissions than that of the four cycle • Greater noise pollution than that of the four cycle • Lower engine efficiency than four cycle
Common Flaws / problems with Diesel engines • Costly to purchase • Heavier than other gas engines
Common Flaws / problems with Natural gas/ propane engines • Availability of fuels