What are solar panels and solar thermal energy respectively
(1) solar panels, solar panels are solar panels by the solar energy converted to electricity can be stored in the battery can also be directly connected to the household power supply.
(2) solar thermal energy, solar thermal energy is mainly solar energy directly heated fluid is converted to thermal energy, can be powered by steam.
Solar panels
(1) advantages: ① wide range of uses, solar panels are directly generated electricity, electricity can be applied to all household appliances, while solar thermal can only produce hot water use a smaller range ② long life, solar panels are generally more than 25 years of service life, compared to solar thermal damage to a faster rate
③ can produce additional power, solar panels are the main generation of electricity, can provide power for the family, followed by solar energy connected to the grid can also get additional revenue.
(2) Disadvantages ① low efficiency, the current solar panels on the conversion efficiency of solar energy is less than 30%, technical reasons lead to high-efficiency work can not be carried out ② longer payback time, due to the high initial cost of a longer period of time to return to the capital to generate profits for about five years in general.
Solar thermal energy
(1) advantages: ① high efficiency, solar thermal energy conversion efficiency of about 80%, can be more solar energy into heat ② occupy less space, solar thermal energy occupies less space, relative to solar panels for low cost
③ to provide floor heating, solar thermal energy can choose to install floor heating system, in special areas of the use of more convenient ④ safety, saving electricity, because solar thermal energy is directly generate hot water to reduce the accidents arising from the safety of electricity, but also do not have to spend additional power used to heat hot water.
(2) Disadvantages: ① too high a requirement for solar energy strength, solar water heaters only in the daytime in the summer can be heated to more than 90 degrees, special areas and winter time solar thermal energy can only be heated to about 20 to 30 degrees
③ solar thermal easy to damage, easy to produce scale, water pipe icing in winter, solar thermal on the roof due to the impact of the environment and the internal water and other reasons with the use of time to increase the frequency of damage will continue to increase, and secondly, in the long term use of the place where the water will accumulate a lot of scale, need to be cleaned up from time to time, in the winter solar thermal can not heat the temperature of the water with the consequent rupture of the water pipe to face the icing
④ impractical, in the hot summer users prefer to use warm or cold water for bathing, washing clothes, etc. but this time the water temperature is extremely high, in winter the water temperature can only be about 30 degrees, very impractical. It is very impractical. ⑤ It is difficult to store, if you want to store more thermal energy, you need to build multiple water storage tanks.
How to choose solar panels and solar thermal energy
From the practical point of view to choose solar panels will be better, taking into account the cost of solar thermal energy will be cheaper, but overall the function of solar panels is better than solar thermal energy.
Summarize
Solar thermal energy in recent years in the development of gradually be eliminated, more users choose solar panels, if you budget enough solar panels are your optimal choice.
