Unit 5 Energy Challenges. http://www.realclearenergy.org/2011/10/27/economic_slowdown_challenges_renewable_energy_242694.html. Section 1: Introduction. Industrialized nations rely on vast quantities of readily available energy to provide what (2) services? (1) power their economies
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Industrialized nations rely on vast quantities of readily available energy to provide what (2) services?
energy is derived from these,
which are non-renewable resources
available only in limited supply.
In contrast, many alternative
sources of energy are renewable
resources because their supplies are refreshed faster than humans consume them. Name three renewable sources.
wind, solar, and hydropower
"Customers don't want lumps of coal, raw kilowatt-hours, or barrels of sticky black goo. Rather, they want the services that energy provides: hot showers and cold beer, mobility and comfort, spinning shafts and energized microchips, baked bread and smelted aluminum. And they want these 'end uses' provided in ways that are secure, reliable, safe, healthful, fair, affordable, durable, flexible, and innovation friendly."
Amory B. Lovins and L. Hunter Lovins, "Mobilizing Energy Solutions," The American Prospect, January 28, 2002
4. Modern societies consume vast amounts of material resources. List (5) material resources.
metals, minerals, stone, chemicals, and fibers
In most cases, these materials are abundant enough that they can be considered what?
These materials are considered either renewable or available in such quantities that we will not soon deplete them.
State the main concerns associated with material resources.
Concerns are generally the costs and the environmental impacts of extracting, transporting, and refining the materials.
5. List what scientists who study energy and material resources seek to understand.
Scientists seek to understand what types of resources are available and where they can be found, and to develop new technologies for locating, extracting, and exploiting them.
List ways to derive more benefits from material resources.
By discovering new supplies and using more energy and materials derives more benefits.
We can use these resources more efficiently, so that we obtain a rising amount of servicefrom a constant level of inputs.
Over the longer term, scientific and technological advances may enable societies to do what with energy sources?
substitute new energy sources and material stocks for old ones
6. But changing from one resource type to another involves more than simply discovering a new mineral deposit or developing a new technology. What else does it mean?
It also means altering the systems that produce, process, and distribute these resources.
Thinking About Supply
7. What are so central to our lifestyle in developed countries, that they often make news when prices rise and supplies tighten?
8. In reality, societies never use up nonrenewable resources completely or exploit the entire flow of renewable resources.
9. Rising prices spur the development of substitutes that were uneconomic when the original resource was cheap. For example, high oil prices are driving significant investments today into fuel production from plant sources .
"The Stone Age did not end for lack of stone, and the Oil Age will end long before the world runs out of oil"
10. The concepts of stocks and flows are important in thinking about resource supplies. Compare and contrast a stock and a flow.
A stock is the amount of material in a certain deposit or reservoir
Flow refers to the rate at which new material is added to the stock (inflow) or removed from the stock (outflow).
What determines whether the stock grows, shrinks, or remains constant?
The net flow rate (inflow minus outflow) determines whether the stock grows, shrinks, or remains constant.
11. Non-renewable resources are limited by the size of their stock, but energy developers consider stocks on several levels. Explain what is meant by the total U.S. copper resources.
Total U.S. copper resources include all known copper deposits and those that are estimated or believed to exist, even if they cannot be economically found or extracted with today's technology.
What are reserves?
Reserves are the subset of this supply whose location is known or very likely based on geological evidence and that can be extracted profitably with current technology at current prices.
the boundaries between recoverable
and unrecoverable reserves shift
as technology improves