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POLY ENGINEERING3-1

DRILL

January 31, 2011

Copy tonight’s homework:

On a separate sheet of paper, define the following:• Combustion, Compression, Conservation, Energy,

Essay, Force, Fuel, Kinetic Energy, Municipal, Potential Energy, Power, Power Plant, Pressure, Propulsion, Renewable, Rudimentary, Thermodynamics, Vector, Volatile, Work

Typed

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1. Communication technology significantly impacts the way we live.

2. Information is an essential resource for design (e.g., Drafting, AutoCAD and Sketchup)

3. Technology has changed the nature of communication in our society (evidenced by the chronology of communication technology).

Main Ideas:

Unit 2 Completion

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– Goals Inform Persuade Entertain Control Manage Educate

– Inputs Source of Communication

– ProcessesEncoder Transmitter Receiver Decoder Storage Retrieval

– OutputsMessage to the destination

– Feedback and ControlReversing the communication line

INPUTS PROCESSES

OUTPUTS

GOALS

GOALS

FEEDBACKControl

Not always

Unit 2 Completion

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Timeline Projects

• Majority of timelines and projects failed to meet minimum requirements.

• Grades will be included on 2nd quarter report card.

Unit 2 Completion

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Bi-weekly Essay AssignmentsPurpose: further develop reading, writing, and

technological literacy skills

Assignment1. Visit the “Assignments” section of the BPI website.2. Read assignment instructions AND FOLLOW THEM.3. Visit online articles.4. Type thorough answers to questions, print your

answers, and bring in ON DUE DATE.

Impacts Journals

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Impacts Journals1. Go to “www.bpi.edu”2. Click “Classes & Homework”3. Click “Engineering”4. Click “Impacts of Technology”5. Scroll all the way down and click “See Homework”

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Bi-weekly Essay Assignments

On the Website1. Assignment details

2. Scoring rubric 3. Links to articles

4. Sample responses

(Beware of grammar, formatting, instructions, and language)

USE the resources given to you!

Impacts Journals

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Bi-weekly Essay Assignments

Due Dates• Every other Monday between now and the end of the

3rd quarter, beginning next Monday.• Follow online instructions carefully – some weeks

require the completion of 2 articles.• January 31 (next Monday) and February 14th are the

first two due dates.• Reminders in class are not likely.

Impacts Journals

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1. Energy Sources – Fuels and Power Plants2. Classical Mechanics:

Force, Work, Energy, and Power3. Trigonometry and Vectors4. Energy and Power 5. Impacts of Current Generation and Use

UNIT 3 – ENERGY AND POWER

Topics Covered

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UNIT 3 – ENERGY AND POWERTopic 1: Energy Sources – Power Plants and Fuels FUEL: a material used to produce heat or power

Most of the following are power plants – what is the fuel shown/used in each image?

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Why a watermark of the Sun?

The Sun is the source of all energy on Earth.

Topic 1

Energy Sources – Fuels

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1. Energy is NOT fuel used for transportation and heating, for lights and appliances, and foods for consumption.

FUEL ENERGY2. Fuels are a source of energy.3. Fuels are the material source of energy,

containing it as a potential.

Fuels and Energy

Topic 1 Energy Sources – Fuels

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1. Non-renewable1. Fossil Fuels

Coal, Natural Gas, Petroleum (Oil)2. Nuclear – Uranium ore

2. RenewableBiofuels, Biomass, Geothermal, Hydro,

Solar, Tidal, Wave, Wind

Fuel Types

Topic 1

Energy Sources – Fuels

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1. Fossil fuels are burned to release stored energy.2. Formed from the heated and pressurized

remains of dead plant and animal life over hundreds of millions of years.

3. Non-renewable – millions of years to form and reserves are being depleted faster than new ones are being formed.

4. Volatile: natural gas and petroleum5. Nonvolatile: coal

Non-Renewable Fuels – Fossil Fuels

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Non-Renewable Fuels – Coal1. Coal is formed from the remains of terrestrial

plants that died around 350 million years ago. 2. Plant remains preserved in water and mud.

Heat and Pressure

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Non-Renewable Fuels – Coal

1. 4,000 B.C.E. – China carved ornaments2. 2,000 B.C.E. – funeral pyres in Britain3. 1,200s C.E. – underground mining developed

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Non-Renewable Fuels – Coal

History of Extraction and Use• Colliery (COLL-yer-ee) – a coal mine and its

connected buildings.Coal must be cleaned and refined (improved) after

extraction• South Wales, Great Britain – oldest known colliery.• First commercial coal mining in U.S. in 1730s, VA.• Prior to 1880s, coal was picked by hand

underground.• By 1912, surface mining was used.

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Non-Renewable Fuels – Coal

Methods of ExtractionUnderground Mining:

• 60% of world production• 33% of U.S. mining• Uses timber for support tunnel• Machines enter and extract coal

Surface (Strip) Mining:• More coal extracted than underground mining• Exposes coal by removing land above deposits

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Non-Renewable Fuels – Coal

Uses• Coal is mostly used as a solid fuel to produce

electricity and heat through combustion.• It is usually pulverized (crushed into small

particles) then burned in a furnace for electricity generation at a power plant.

• ~40% of world’s electricity comes from coal• ~49% of U.S. electricity comes from coal