Term geothermal heating refers to the direct use of heat stored in the Earth's core to heat our homes, offices, or for any other heating application. The popularity of geothermal heating systems continues to grow though on global scale it still accounts for only around 0.07% of global primary energy consumption.
Geothermal heating systems have lot more pros than cons but let me first explain the working principle of geothermal heating system. Geothermal heating systems use geothermal heat pumps to force the transfer of heat from the ground to the desired heating application. Each geothermal heat pump is equipped with an outdoor unit called condenser and an indoor unit that's called an evaporator coil. In order for heat to be successfully transferred we also need refrigerant, usually in form of highly pressured liquid. This refrigerant circulates underground, absorbs heat from the ground, and on its return, the now warmer fluid passes through the heat pump which uses electricity to extract the heat from the fluid, and the re-chilled fluid is sent back through the ground to continue this cycle. This extracted heat is then used to heat our homes and offices.
Solar energy is not a perfect energy source but nonetheless using solar energy has lot more benefits than drawbacks as you'll see by further reading this article.
The popularity of solar and wind grows rapidly worldwide. These are the two fastest growing renewable energy sectors in the world but nonetheless they are yet to find the adequate energy storage solution.
Solar energy industry is one of the fastest developing industries in the world. The global solar power market continues to grow rapidly and many energy experts believe that solar power will eventually become the most important energy source in the world.
Wind energy is generally considered an environmentally friendly source of energy because it does significantly smaller damage to our environment when compared with currently dominant fossil fuels.