Tuesday, October 4, 2011

Master Plan

In order to best utilize the resources available in the United States, each region will use the renewable energy that is most prevalent in the area.  For example, all of the solar energy farms will be located in the bright red area of the map and all the wind energy will come from the purple areas of the map.  


By only using the places with high wind and lots of sunlight, the area required for powering the US is reduced.  The plan for the United States energy production is summarized in the tables below:




As seen in the table, wind power will make up about 65% of the United States energy profile and solar power will make up about 32%.  This is done because the cost of wind power is significantly lower than the cost of solar power.  The area required fort the wind power is approximately 11.5% of Nebraska while the area required for solar is about 1.7% of Arizona.

This plan is not completely feasible because it would be difficult to transport the energy around the country.  

Sources:

Monday, October 3, 2011

Energy Sources Comparison

To compare different energy sources a table has been created, which allows the reader to come to several conclusions about the different sources.
Sources:



Are Energy Issues a Private or Public Concern?

Currently most of America is not truly concerned with energy issues, or most issues for that matter. This makes sense as energy prices are have not become of great concern for the the average person. Even a doubling of gas prices in only a few years has only marginally affected how people live their lives. The few who do care do what they can to influence politicians who in turn do a little to appease them, thereby showing that they are being proactive without really much effort. In order for the energy issue to not become an energy crisis both private citizens and public figures and corporations will need to get drastically more involved. Everyday people could install renewable or energy efficient upgrades to their homes or lobby elected officials to do similar things. The government should also be more proactive with legislation to put the nation on the right track to prevent the inevitable energy crisis 

What is Feasible?

It has been shown that the United States has the capability to produce a large amount of renewable energy, but is it reasonable to do this? The US, and the rest of the world could very well blanket large portions of land or sea to produce this electricity, as shown below. However, will the cost of doing this make it infeasible?

As the price per watt continues to decline for solar power plants more businesses will invest. Up and coming technologies are allowing these power plants to complete with coal on both price and land use. Once this has happened there will be little reason not to build as many solar power plants as possible.

Sunday, October 2, 2011

Energy Density

Energy density is the amount of energy stored within an energy source.  This concept is intimately related to waste so it is best to examine them together.

Some examples of energy density in kWh/kg are below:
Nuclear Fission (100% U-235) 24,513,889
Natural Uranium (99.3% U-238, 0.7% U-235) in a fast breeder reactor 6,666,667
Enriched Uranium (3.5% U-235) in a light water reactor 960,000
Natural Uranium (99.3% U-238, 0.7% U-235) in a light water reactor 123,056
LPG propane 13.8
LPG butane 13.6
Gasoline 13.0
Diesel fuel/Residential heating oil 12.7
Biodiesel oil 11.7
Anthracite Coal 9.0
Water at 100 m dam height 0.0003

It is obvious that nuclear has the highest energy density by far.  All other fuels are around the same range.

Because energy density is related to how much fuel is needed once it is used up it becomes the amount of waste that has been produced.  Below the waste per kWh is displayed.

Type of Plant Amt of Electricity Produced (MWh)







Waste per kWh (lbs)
Nuclear 7,971,600







0.007
Coal 6,683,880







2,347
Natural Gas 998,640







400
Petroleum (Oil) 1,173,840







566

Once again the results are staggering.  Nuclear is much cleaner than all other options.  With this trend we must seriously consider nuclear to be a top option for energy production.  This means we must weigh all pros and cons to see if this is a viable option.


Sources:
http://nuclearfissionary.com/2010/06/09/energy-density-and-waste-comparison-of-energy-production/

Cost of Energy Production

The best way to legitimately consider cost of different sources of energy production is to determine the kWh cost.  This calculation is broken down into the following equations:

Construction/kWh + Production/kWh + Decommissioning/kWh (nuclear only) = Total Cost/kWh

Once the calculations are performed nuclear and coal come out at about .04$/kWh while wind and natural gas are between .05 and .1 $/kWh.  Hydro is the cheapest; however, is not a feasible option in most places.  Solar comes in as the most expensive by far.


Sources:
http://nuclearfissionary.com/2010/04/02/comparing-energy-costs-of-nuclear-coal-gas-wind-and-solar/

Capacity Factor

What is the capacity factor (CF)?
The capacity factor measures the performance of a power source as a percentage of its total power potential.  It can be looked at as the percentage of power it is operating at compared to its maximum operating power and for what percent of the time it is operating.  The higher the CF the more stable the grid is.  If a power plant has a high CF it rarely strains the grid because it is constantly putting out power thus other parts of the grid don't need to pick up its "slack" when it is not producing power.

Various CF's from nuclearfissionary.com:

  • Combined Cycle Natural Gas Plant–11.4%
  • Oil–13.4%
  • Hydroelectric–36.3%
  • Renewables (Wind/Solar/Biomass)–40%
  • Coal–73.6%
  • Nuclear–91.8% 
 The two most important numbers here are renewables and nuclear.  Renewables low CF means they are unreliable and this is a major reason there must be other power sources.  It is because they are not as reliable as nuclear for example.  Nuclear's high CF is an important factor as well.

Sources:
http://nuclearfissionary.com/2010/03/05/why-capacity-factor-matters-to-energy-production/