Geothermal heat recovery systems
Introduction
A renewable resource is a natural resource that can be restored by natural processes at a rate greater than that of consumption by humans. Solar radiation, intertidal radiation, wind and hydroelectric energy are perpetual resources that are not in danger of being depleted in the long term. Renewable natural resources also include "Commodity (economy)" materials such as wood, paper, leather, etc., if they are sustainably harvested.
Some renewable resources such as geothermal energy, fresh water, wood and biomass must be carefully managed to avoid exceeding their global regenerative capacity. It is necessary to estimate the capacity to guarantee the maintenance of such resources. Compared to fossil fuels, energy obtained from renewable resources causes less impact on the environment.
Products such as gasoline, coal, natural gas, diesel and other products derived from fossil fuels are not renewable.
Renewable energy
Contenido
El sol, el viento, los océanos y la biomasa proporcionan fuentes alternativas sustentables de energía.
Solar energy
Solar energy is energy derived directly from the sun. The Earth receives 174 petawatts of incoming solar radiation (insolation) from the uppermost layer of the atmosphere.[1] Approximately 30% returns to space, while clouds, oceans, and land masses absorb the remainder.
It is estimated that the total energy absorbed by the atmosphere, oceans and continents may be 3,850,000 exajoules "Joule (unit)") per year.[2] In 2002, this energy in one hour was equivalent to the world's global energy consumption for a year.[3][4] The amount of solar energy received annually is so vast that it is approximately double all the energy ever produced by other non-renewable energy sources such as oil, coal, uranium and natural gas.[5].
The most developed source of solar energy today is photovoltaic solar energy. By the end of 2015, around 230 GW of photovoltaic power had been installed worldwide.[6] Solar thermoelectric power (CSP), however, although it has also progressed in recent decades, still represents a small fraction of solar energy's global contribution to energy supply.