PV Gap

Teresa Said:

What are some of the problems that limit the availability of solar energy as an alternative energy source?

We Answered:

Cost of solar panels. They are so expensive where consumers need to invest large amount of money. Aside from solar panels, you will also need other accessories like batteries, inverters and chargers. I'm sure if the cost of these needed materials drop by 50%, all of us will go to solar energy.

Emma Said:

What should I do to start my career in the solar and alternative energy field?

We Answered:

Check out this company I represent. I think it may suit you well.
www.powur.com/therisingsun
If you have any questions feel free to call me anytime.
Joshua
602 418 2823

Dolores Said:

what are problems associated with alternative energy sources such as solar power and nuclear?

We Answered:

Hurdles in using solar power:
1. It's affected by time(day/night), climatic conditions and geographic location.
2. Initial Investments are high.
3. All technological developments are made by keeping the conventional energy sources in mind. Thus, solar energy cannot be integrated easily with these technologies involving additional cost.

Cons of nuclear energy:
1. Disposal of radioactive waste material is not easy.
2. Working with radioactive substance is hazardous and can cause genetic mutations in humans if they come in contact with such a substance.
3. Controlled reactors are required for generating energy so that the fission chain reaction does not go out of proportion.
4. Radioactive material is rare and available only in a few places of the world.

Norman Said:

Is it possible to run a car off of alternative energy other than ethanol and solar power?

We Answered:

Solar is not practical. Geothermal is not possible for a car. Wind is not practical either. Tidal energy is not possible. Any internal combustion engine will run on propane / methane / natural gas (they are all basically the same thing) with very little modification. The exhaust is a little better than 98% clean. Any internal combustion engine can be modified to burn hydrogen, with warm water vapor as the only exhaust. Any diesel engine can burn cooking oils. Much lower exhaust emissions. Electric cars are possible and do exist, but the costs are high and the maintenance is high. Fuel cell cars are here but are high maintenance and do not perform well in cold temperatures and refuse to operate in very cold temperatures (they freeze solid - water does that).

Dolores Said:

If pursuing alternative energy (solar, wind, etc) have a lot of benefits, why do some people still oppose it?

We Answered:

Alternative energy is much like alternative medicine in that it isn't really any good (you're assuming it has a lot of benefits when it turns out that it doesn't (unless you're a coal miner whose job would go were a switch to nuclear power to occur)).

Hydro and geothermal work OK but only for limited areas (and high levels of hydro are one of the things that countries with low CO2 emissions tend to have along with high levels of nuclear) and we're probably not going to be able to build much new hydro in the developed world due to environmental reasons.

Wind turns out to be almost useless due to the low reliability (and people are starting to realise that it is useless) since it requires either energy storage technology (pumped hydro which is all we have isn't really good enough) or fossil fuel backup (which means you still have to emit CO2 when the wind isn't blowing) and that fossil fuel backup is usually simple cycle gas turbines (converting them to combined cycle and removing the wind turbines would probably reduce CO2 emissions).

Of course there are times when wind power is built without sufficient spinning reserve, such as in Texas which has been having to do load shedding of big industrial customers when the wind stops (that's a pretty big deal) due to their 3% wind power suddenly going off-line. Wind doesn't look like it's capable of even 5% of a grid without energy storage technology.

Solar is less unreliable than wind but if your solar panels are on Earth they only work less than half the time (though there is a bit more predictability in terms of when the clouds are going to role in and when it'll be night than there is with wind), of course PV happens to be about the most expensive way to generate electricity on Earth (only Pu238 RTGs cost more and those things are pretty much restricted to the space program (and used where solar can't work)).

Biofuels really screw up food prices and when deforestation is taken into account turn out to emit more CO2 than oil. A lot of them (e.g. wood) are very polluting (enough to justify a ban on wood fired heaters).

Other reasons to be against alternative energy are NIMBY issues like hydroelectric dams requires flooding people's homes (and risk to those who live downstream), wind turbines producing a lot of noise (and possible negative health effects from infrasonics (more study is needed though)) along with a strobe light effect to those who live near them (an exclusion zone would probably work though) as well as opposition to the transmission lines used to get the power from the remote environmental sources of energy to the grid (the health effects from power lines have been investigated and found to not exist but that doesn't stop people from fearing them). Those issues would be minor issues if the alternative energy sources actually were useful (i.e. we could deal with them) but with useless energy sources that's too big a price to pay.

The large scale of most alternative energy projects also causes significant environmental problems, wind turbines are stealing energy from the wind and solar power plants often require trees to be cut down (then there are the bird and bat death issues with wind power and the waste issues of solar panel production (a solar panel is a big silicon chip)) whereas we should be using an energy source that is concentrated enough for mining and waste disposal to be of minimal impact.

"Wouldn't it create more jobs"
So what? Doing pretty much anything can create jobs.

Personally I'd rather have as few people as possible work in the energy industry, that way we could have more people doing other jobs. You basically just want to waste human resources.

Besides, wind turbines are actually a lot more dangerous than most people realise, quite a few people have died installing and maintaining them.

"and be better for the environment,"
All that alternative energy does is distract people from nuclear fission which is a proven technology that actually can provide the energy we need, where we need it, when we need it. If not for the belief that wind and solar were viable we'd have probably replaced most of the fossil fuel burning power plants on the planet with nuclear by now (and therefore have already largely solved the global warming problem).

"and also reduce dependency on foreign oil?"
Pretty much no electricity is actually generated from oil (which is primarily a transportation fuel) so that leaves biofuels which create new problems with the food supply, dependence on foreign oil is quite a bit better than causing famines in the third world.