solar energy in 2021

solar energy definition

solar energy definition: They are photothermal filaments emitted from the sun that are converted by human-developed technology into heat energy for heating or to produce electrical energy.
Through the photoelectric phenomenon


How much solar energy reaches the Earth?

Planet Earth receives approximately 174 petawatts of incoming solar energy from the sun
A value of 52 petawatts, or 30% of this radiation, is bounced or reflected back to space, while a value of 123 petawatts, or about 70%, goes to oceans, clouds and land masses.


Benefits of solar energy

1- A renewable energy source

Rather, it can be considered the most important source of renewable and clean alternative energy through which electricity can be generated and air and water heating
It is worth mentioning here that a person can benefit from it at a rate of four and a half hours per day for life or for more than 4 billion years, i.e. until the existence of the sun planet.

2- An environmentally friendly source

This is because it helps to naturally preserve the components of the environment, such as conserving water, reducing air pollution, slowing climate change and reducing the impact of carbon emissions.

3- Helps reduce energy bills

Especially since it is a source from the Creator of the universe, which is free, and there is no cost of supply, the cost lies only in installation and low maintenance


Fields of use of solar energy

1- Generating electrical energy through photovoltaic cells

This is known as solar energy to produce electricity
They are solar cells in the form of panels that absorb light from the sun and form a continuous current
The components of this system are:

1- Solar cells and panels
2- Galvanized steel plate-bearing body
3- Circuit wires, in series or parallel
4- An alternating current inverter
5- Current storage / direct connection to the network batteries
central solar system

2-Concentrated Solar Power

It is a system that uses mirrors and lenses to focus a large amount of sunlight on a small area to generate heat. It consists of:

1- The solar field

It is responsible for converting solar energy into thermal energy

2- heater tank

It is responsible for storing thermal energy

3- Energy production unit

It is responsible for generating electric power through a steam turbine that works on steam produced by the heat of the sun
Solar heating systems

3-Solar Power Systems for Heating

Here, the heat energy transferred from the sun is employed to heat water with the intention of use or with the intention of heating the air inside the facilities, and this energy is considered an alternative to gas and fuel used for the same purposeā€¦ It is also 100% environmentally friendly.
Central heating works in this system in two ways:

1- Active solar heating

By circulating water heated by the heat of the sun
Within a network that starts from the surface inside pipes to radiators (heat exchangers) inside buildings by means of pumps and fans

2- Passive solar heating

It means the transfer of heat inside buildings in a natural way without the use of external energy


Benefits of solar energy on the environment

1- Save water.

2- Reducing air pollution.

3-Slow climate change

4- Reducing the carbon footprint

5- Reducing dependence on fossil fuels

In this article, I talked about solar energy in a briefly
I will introduce each solar system in a dedicated article in the coming days, and I will explain in detail about the mechanism of each system, the type of energy it will generate, and the efficiency that the system will do, and I will give recommendations for each system

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