This is photosynthesis.
Energy is the driving force of the ecosystem and the basis of all life activities. Photosynthesis is the only effective way for plants to capture solar energy. Plants capable of producing food molecules through photosynthesis are called autotrophs, mainly green plants.
The energy conversion path when the solar combustion battery works is
The principle of solar power generation is to use the radiant energy of the sun to pass through water or other media and device systems converted to electrical energy. There are two basic ways to convert it into electrical energy. The first is that light converts the energy of solar radiation into thermal energy, that is, the production of solar thermal energy. Another method is to convert sunlight directly into electrical energythanks to photovoltaic devices, that is to say the production of solar energy.
There are two types of thermal energy production. One of these is solar thermal power generation, which uses reflectors to capture sunlight to heat water or other media, causing it to generate steam to power engines thermal turbines such as turbines, then drive generators to produce electricity. The other is to use the principles of direct thermoelectric conversion, such as thermoelectric (thermocouple) power generation, thermionic power generation, thermoelectronic power generation, magnetic fluid power generation, etc. , to directly convert accumulated solar heat into electrical energy.
The solar energy conversion route in the inorganic world is
(1) Electrolysis of water to generate hydrogen and oxygenene. The chemical equation for this reaction is: 2H. 2 O energizes. 2H 2 ↑ + O 2 ↑; (2) At night, the working principle of the solar fuel cell is to use the reaction of hydrogen and oxygen produced by the electrolyzer during the day to convert the generated energy into electrical energy. , then uses electric energy to heat the water heater, so the energy conversion path is: Chemical energy → Electric energy → Thermal energy (3) Electrolysis of water generates hydrogen and l 'oxygen, and hydrogen and oxygen react to generate water, therefore; the recyclable raw material in solar fuel cells is water; (4) Solar cells can only work when there is sunshine. Compared to a single solar cell, a solar fuel cell can also be used at night, extending the battery life. The answer is therefore: (1) 2H 2 O for electricity 2H 2 ↑+O2 ↑ ; (2) B (3) Water (4) It can also be used at night.
The pathway for solar energy conversion in the inorganic world is the exchange of the upper lithosphere, atmosphere and hydrosphere.
Data Extension:
Solar energy is a renewable energy source. It refers to the energy of thermal radiation from the sun (see the three modes of propagation of thermal energy: radiation). Its main manifestation is that it is often).Said the rays of the sun. Nowadays, it is typically used to generate electricity or provide energy for water heaters.
Since the birth of life on earth, it has mainly relied on the energy of thermal radiation provided by the sun. Since ancient times, humans have also known how to use sunlight to dry objects and use it as a method. to prepare food, such asmake salt and dry salted fish. With the decline of fossil fuels, solar energy has become a significant part of human energy consumption and continues to grow.
There are two ways to use solar energy: photothermal conversion and photoelectric conversion. Solar power generation is an emerging renewable energy source. Solar energy in a broad sense also includes wind energy, chemical energy, hydropower, etc. on earth.
Technical principle
Solar energy is generated by the fusion of hydrogen and helium inside the sun to release a enormous nuclear energy. sun. Most of the energy needed by humans comes directly or indirectly from the sun. Plants release oxygen, absorb carbon dioxide and convert solar energy into chemical energy and store it in the plant bodye by photosynthesis.
Fossil fuels such as coal, oil and natural gas are also primary energy sources formed by the evolution of ancient plants and animals buried underground over a long geological period. The energy contained in the earth itself generally refers to the energy related to the thermal energy inside the earth and the energy related to the nuclear reaction.
The energy linked to nuclear reactions is nuclear energy. When the structure of the atomic nucleus changes, it can release a large amount of energy, called nuclear energy, or nuclear energy for short, commonly known as atomic energy. It comes from nuclear fission energy resources when uranium, plutonium, etc. are produced. stored in the earth's crust undergo fission reactions, and nuclear fusion energy resources when deuterium, tritium, lithium, etc. stored in the ocean sutake place in fusion reactions.
These substances release energy when nuclear reactions occur. Currently, the main use of nuclear energy is electricity generation. In addition, it can also be used as other types of energy sources, heat sources, etc.