4.:Làm việc theo cặp. Hỏi và trả lời các câu hỏi về ưu điểm và nhược điểm của từng loại nguồn năng lượng.

Me : Lan ! Can you tell me about the advantages and disadvantages of wind energy?

Lan : Sure , Advantages :
Strong energy is in bulk and in bulk.
Our potential is great.
Our productivity can create and is no different.
Wind turbines are the space while eating. We can create
Hardware and software, rewards and rewards for you.
Our value
Cost nothing
Good domestic potential: Turbines in bringing attention to their health and health.

disadvantages :

Wind is a source of fluctuating (non-continuous) energy and is not suitable to meet the base load energy needs unless some form of energy storage is used (e.g. batteries, hydraulic pumps).
The production and installation of wind turbines require large investments - both in commercial and civil applications.
Wind turbines can be a threat to wildlife
Make a noise
How wind turbines look aesthetically is also a concern

Me : Oh ! I see

Me :  But I don't know about the advantages and disadvantages of solar power , Can you tell me ?

Lan : Sure , why not ! advantages :

1. The ability to reproduce

Solar power is a renewable energy source, unlike fossil fuels such as coal, oil, gas ... which are irreversible fuel sources. According to NASA calculations, the sun can still provide us with energy in about 6.5 billion years.

2. Abundance and abundance

The potential of solar energy is enormous - every day, the earth's surface receives 120,000 terawatts (TW) of sunlight, 20,000 times higher than the needs of humans worldwide (1TW = 1,000 billion W).

3. Sustainable and endless supply

Solar energy is endless, abundant to meet the energy needs of mankind, enough for many generations to come.

4. Availability

Solar energy can be received and used anywhere in the world - not only in the region near the equator, but also in the high latitudes of the north and south. For example, Germany is currently leading the world in the use of solar energy and plans to make the most of this potential.

5. Ecological clean

Following the recent development trend in the fight for the cleaning of the earth's environment, solar is the most promising area that can partially replace energy from non-renewable fuels and due to As such, it plays an important role in protecting the environment from global warming. The production, transportation, installation and operation of solar power plants basically does not release harmful gases into the atmosphere. Even when emissions are small, when compared to traditional energy sources, the amount of gas is negligible.

6. Does not make noise

In fact, solar power production does not use the same kind of motors as in generators, so generating electricity does not make noise.

7. High efficiency, low operating costs

Switching to using solar cells, households will get a significant savings in spending budget. Maintenance and maintenance of household solar power systems is very low cost - in a year, you only need to clean a few solar panels and they will always be repaired. Manufacturer warranty period up to 20-25 years.

8. Widely applied

The application spectrum of solar energy is very wide - providing electricity in areas not connected to the national power grid (even in highly developed countries such as the US, Russia, France ... there are still areas. such a remote area is called an "electric blind spot"; used to desalinate seawater in many African countries where freshwater is scarce and even provide energy to satellites in orbit. Solar power has recently been called the "universal energy", reflecting the simplicity of integrating solar power into home power systems, in parallel with grid electricity or electricity from other sources.

9. Advanced technology

Technology for making solar cells is getting more advanced every day - thin film modules are introduced directly into the material right from the initial pre-processing stage. Japan's Sharp Corporation, also a solar cell manufacturer, has introduced an innovative system for storing energy elements for window glass. The latest achievements in the field of nanotechnology and quantum physics allow us to expect the ability to increase the capacity of solar panels to 3 times that of today.

disadvantages :

1. High cost

There is an opinion that solar power belongs to the expensive type of energy - this is probably the most controversial issue in using this source of energy. Because storing solar energy at home requires significant initial costs, many countries encourage the use of clean energy sources by making credit loans for implementation or for Rent solar panels under contracts that benefit tenants

2. Not stable

There is an unforeseen fact: At night, on cloudy and rainy days there is no sunlight, so solar energy cannot be the main source of electricity. However, compared to wind power, solar power is still a more advantageous option.

3. High energy storage cost

The price of storage batteries for solar power to use electricity at night or when it is not sunny today is still quite high compared to the pocket of the majority of people. Therefore, at the present time, solar power is not likely to become the only source of electricity for households but can only be an additional source for electricity and other sources.

4. Still polluting the environment, though very little

Although compared to producing other types of energy, solar power is more environmentally friendly, but some of the technological processes for making solar panels also come with the release of greenhouse gases. , nitrogen trifluoride and sulfur hexafluoride. On a large scale, the installation of solar cell fields also occupies a lot of the land that would otherwise be reserved for trees and vegetation in general.

5. Using many expensive and rare ingredients

The manufacture of thin-film solar panels requires the use of cadmium telluride (CdTe) or gallium selenide indium (CIGS) - very rare and expensive substances, which leads to an increase in costs.

6. Low energy density

One of the most important parameters of solar power is the average power density, measured in W / m2 and described by the amount of power that can be obtained from a unit of area of ​​the power source. The index for solar power is 170 W / m2 - more than other renewable energy sources, but lower than oil, gas, coal and nuclear power. For this reason, generating 1kW of electricity from solar heat requires a fairly large area of ​​solar panels.

Cho mk ctlhn nha ! <3