subject: How The High Cost Of Solar Power - Solar Power, Energy Storage - Electrical Industry [print this page] Sun for one hour produces the Earth's energy, enough energy needs of the world throughout the year. Now, therefore, the use of solar energy as we get rid of dependence on oil, the ultimate way. If we can save resources, use of solar energy, access to energy net profit, we truly claim to have inexhaustible energy.
In the fossil Energy The peak of the background and issues such as binding emissions reduction under the big people's pursuit of new energy, solar energy comes as the hottest fields.
Sun for one hour produces the Earth's energy, enough energy needs of the world throughout the year. Now, therefore, the use of solar energy as we get rid of Oil Dependent on the ultimate way. If we can save resources, use of solar energy, access to energy net profit, we truly claim to have inexhaustible energy.
However, this is all just abstract speculation.
In the world, solar energy has made rapid development, but the use of solar power far less than the proportion of 1% of total global energy consumption. Cost is not caused by the widespread application of solar energy an important reason. The reason why this inexhaustible energy costs high, and the vicious circle between natural inextricably linked.
Now mostly used in solar cells made of silicon materials, as silicon and Other Material compared with the more efficient. However, silicon is a more difficult material. In addition, the manufacturing process also requires a lot of water and energy. The latest alternative to silicon thin film photovoltaic materials. Photoelectric efficiency than silicon film in the same capacity requires more optical films.
However, when it comes to a critical issue?? Solar cells can produce "net energy" (energy output than energy consumed)? Either the current or future, we do not have clear answers. Now, the manufacturing of solar cells directly to lower its output of energy consumption of energy, it seems that it can produce net energy. However, drawing conclusions, we need to do some other factors to consider.
One problem is energy storage. Only during the day as sunlight exposure, but not necessarily sunny day. If you want to rely entirely on solar energy, solar energy storage method must be found. So far, we have not found a cost-effective way to store solar energy. Present two methods developed?? Compressed air and battery storage is very expensive.
Really calculating solar cells can produce net energy, energy storage system must consider the construction of the energy input. Only through a more detailed study, to get the exact answer. In any case, the performance of solar cells there is a huge regional differences?? More adequate sunlight area, the higher its performance must.
To our knowledge, solar cells is currently not widely used because: Once the installation and maintenance costs involved, to rely on (especially by doing raw material silicon) solar cell power generation, power generation than rely on other resources more expensive than the cost.
The second problem is the optical film.
So far, the most successful film photovoltaic technology is cadmium telluride. The technology from the first solar company (FirstSolar) to create the following years, the company's stock soaring. First Solar is good at style all their own, and its goal is to use the technology within a few years to make solar power cost and the current cost of electricity unchanged.
Us achieve this goal will be an important step. Unfortunately, we met a difficult problem. Need to rely on tellurium thin film technology, and tellurium is one of the world's most rare metal, used in memory chips, CD, and was used as lead and copper enhancer. From 2000 to 2006, telluride prices rose more than 7-fold, rising faster than all other goods. At present, tellurium solar cells as raw materials to provide energy accounts for only 1% of world energy demand.
As long as the thin film technology have significantly increased, the demand will steadily rise tellurium. Some geologists think that even if the existing use cases, to 2020, telluride will become very scarce. Clearly, as long as the expansion of thin film solar cell production, will inevitably lead to a shortage of tellurium.
This difficult issue is becoming more complex, the vicious cycle between goods once again we have a problem. Most of tellurium from copper refining are, but rising energy prices, copper mining has become a high cost. Thus, tellurium price has increasingly faced with rising pressure.
