Conservapedia - User contributions [en]

Solar power

2011-08-29T23:45:54Z

Cdizon: /* Distributed Generation */

'''Solar power''' typically refers to the production of electricity from light given off by the sun. The most common instance of this is the use of photovoltaic cells in solar panels, which have been employed on the small scale (e.g. solar powered calculators) and large scale (e.g. solar power plants, orbiting artificial satellites). Solar power is a renewable energy source, in contrast with [[fossil fuels]]. Solar power production via photovoltaic cells typically produces a less efficient conversion of energy into electricity compared to power production from the burning of fossil fuels, but with the abundance of solar rations available to Earth, this limited efficiency is normally inconsequential. The main drawback to using solar power as a principle energy source is the the inability to provide baseload power throughout the day and night: the sun cannot be guaranteed to shine every day, power is still in demand after the setting of the sun, and some areas of the world do not receive enough consistent sunlight to rely on solar power as a main energy source. Thus, solar power will, at least in the foreseeable future, not become a principle part of the world's energy production but may still be very useful in supplementing power demands in some parts of the world. Employment of small solar power arrays in areas that are rarely overcast (e.g. the American southwest) may allow some businesses to cheaply produce products and chemicals that require large electrical demand (e.g. the production of extremely pure hydrogen and oxygen from the electrolysis of water).

==Grid Parity==
Grid parity refers to the point where power provided by solar panels (photovoltaic solar) is at the same or lower price of conventional power sources such as coal, natural gas or nuclear. The price per watt of installed solar has been steadily falling while the price of other energy sources including wind power has been steadily rising. A historic crossover with nuclear power occurred in 2010. In regions with adequate sun exposure electricity can now be produced at a lower cost per kWh with PV solar than with nuclear power. The price for a DIY residential grid-tie solar system can be as low as $2.50/w (2011), before subsidies or tax credits. At this price the system would pay for itself in ~12 years, many utilities offer incentives that can lower payback to <4 years. Most systems carry a 25-30 year warranty. Due to the fact that most solar power is produced when electric demand is highest, between 3pm - 7pm many utilities actually benefit from paying their customers to install solar panels since most districts do not charge peak rates. It can cost a major utility as much as $.50/kwh during peak demand while solar production credits are usually ~$.20/kwh. Roof-top PV can be extremely cost-effective since no land needs to be purchased.

==Distributed Generation==
Conventional sources of power generation are concentrated in power plants that range from 100MW to 1000MW. Distributed Generation is the grid-tied production of electricity from smaller generators typically less than 100 kw. Solar Power is an ideal source of energy for distributed generation. Most residential rooftops are capable of supporting at least 3 kw of solar panels while many commercial warehouses can support several MW of solar PV. In sunny regions of the US this is adequate to provide >50% of the electricity requirements for the average US household. One major advantage to distributed generation is that it is consumed very close to where it is produced, this decreases the stress on America's electric grid which is already operating near capacity. Germany is an example of how effective distributed generation can be adding 7 GW of solar power in 2010 alone, this is more electricity than is produced by a nuclear power plant. Solar power often provides >10% of electricity in Germany during the day and doubled in capacity from 2009 to 2010.

==Global warming claims==
[[Liberal]]s often point to solar power as a way to "solve" global warming. This has several problems. Other than the fact that [[Counterexamples to Global Warming|the claim of global warming is dubious, to say the least]], solar power is not very efficient, giving much less energy than oil. Many liberals have tried to force solar power onto many areas, despite the fact that it would be very costly and would be much more inefficient than oil, for example.
[[Category:energy]]

Solar power

2011-08-29T23:31:11Z

Cdizon:

'''Solar power''' typically refers to the production of electricity from light given off by the sun. The most common instance of this is the use of photovoltaic cells in solar panels, which have been employed on the small scale (e.g. solar powered calculators) and large scale (e.g. solar power plants, orbiting artificial satellites). Solar power is a renewable energy source, in contrast with [[fossil fuels]]. Solar power production via photovoltaic cells typically produces a less efficient conversion of energy into electricity compared to power production from the burning of fossil fuels, but with the abundance of solar rations available to Earth, this limited efficiency is normally inconsequential. The main drawback to using solar power as a principle energy source is the the inability to provide baseload power throughout the day and night: the sun cannot be guaranteed to shine every day, power is still in demand after the setting of the sun, and some areas of the world do not receive enough consistent sunlight to rely on solar power as a main energy source. Thus, solar power will, at least in the foreseeable future, not become a principle part of the world's energy production but may still be very useful in supplementing power demands in some parts of the world. Employment of small solar power arrays in areas that are rarely overcast (e.g. the American southwest) may allow some businesses to cheaply produce products and chemicals that require large electrical demand (e.g. the production of extremely pure hydrogen and oxygen from the electrolysis of water).

==Grid Parity==
Grid parity refers to the point where power provided by solar panels (photovoltaic solar) is at the same or lower price of conventional power sources such as coal, natural gas or nuclear. The price per watt of installed solar has been steadily falling while the price of other energy sources including wind power has been steadily rising. A historic crossover with nuclear power occurred in 2010. In regions with adequate sun exposure electricity can now be produced at a lower cost per kWh with PV solar than with nuclear power. The price for a DIY residential grid-tie solar system can be as low as $2.50/w (2011), before subsidies or tax credits. At this price the system would pay for itself in ~12 years, many utilities offer incentives that can lower payback to <4 years. Most systems carry a 25-30 year warranty. Due to the fact that most solar power is produced when electric demand is highest, between 3pm - 7pm many utilities actually benefit from paying their customers to install solar panels since most districts do not charge peak rates. It can cost a major utility as much as $.50/kwh during peak demand while solar production credits are usually ~$.20/kwh. Roof-top PV can be extremely cost-effective since no land needs to be purchased.

==Distributed Generation==
Conventional sources of power generation are concentrated in power plants that range from 100MW to 1000MW. Distributed Generation is the grid-tied production of electricity from smaller generators typically less than 100 kw. Solar Power is an ideal source of energy for distributed generation. Most residential rooftops are capable of supporting at least 3 kw of solar panels while many commercial warehouses can support several MW of solar PV. In sunny regions of the US this is adequate to provide >50% of the electricity requirements for the average US household. One major advantage to distributed generation is that it is consumed very close to where it is produced, this decreases the stress on America's electric grid which is already operating near capacity.

==Global warming claims==
[[Liberal]]s often point to solar power as a way to "solve" global warming. This has several problems. Other than the fact that [[Counterexamples to Global Warming|the claim of global warming is dubious, to say the least]], solar power is not very efficient, giving much less energy than oil. Many liberals have tried to force solar power onto many areas, despite the fact that it would be very costly and would be much more inefficient than oil, for example.
[[Category:energy]]

Evolution and science

2010-05-22T15:13:44Z

Cdizon:

'''Evolution and science''' have some things in common, but otherwise are in conflict on several points. Darwinists say that the [[theory of evolution]] is scientific and that no other theory is worthy of consideration. This in itself is anti-scientific, because science has always progressed by exposing every existing theory to criticism and testing and welcoming any new theory which can explain known phenomena.

Here is a table of [[Liberal]] claims about [[evolution]], contrasted with what science actually knows.

{|border=1 cellpadding=3
| Evolution
| Science
|-
| Support withdrawn from ideas such as Lamarckism.
| Scientific theories must withstand scrutiny
|-
| Support for common descent from all scientific academies.
| Scientific theories must command the consensus of the scientific community.
|-
| Exposed piltdown man as a hoax.
| Scientific method systematically roots out fraud
|-
| Every new fossil discovered tests evolution.
| Makes testable predictions
|-
| Explains how natural selection is a form of design.
| Explains irreducible complexity
|-
| Helping in fight against drug resistance disease
| Provides positive effects to society
|-
| Supported almost entirely adherents to the scientific method
| Steps... Observation, Test, Hypothesis and Theory
|}

'''Tests of the Theory'''
----
A scientific theory must by definition be falsifiable. It must make a prediction that can be shown through observation to be right or wrong. The theory of evolution is arguably one of the most thoroughly tested theories. Every excavation into ancient rock is a fresh opportunity to disprove the theory. If a fossilized monkey were discovered in Jurassic Rock the theory of evolution would be on the block for a major revision.

[[Category:Science]]

2007-03-19T04:38:44Z

Cdizon: New page: Plate tectonics is a theory of geology that has been developed to explain the observed evidence for large scale motions of the Earth's crust. The theory encompassed and superseded the olde...