"Energy" Energy and Sustainable Development PPT Courseware 2 Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
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Authoritative PPT Summary
"Energy" Energy and Sustainable Development PPT Courseware 2
1. What is energy?
Question: We have to eat every day, what should we use to cook it?
Answer: coal, gas, firewood, natural gas...
Question: What does it take to drive a car, train, plane or other means of transportation?
Answer: Gasoline or diesel, kerosene, etc.
Question: What are the functions of coal, gas, firewood, natural gas, gasoline, kerosene or diesel?
Answer: Their role in the above work is to provide energy.
What is energy?
Material resources that can provide energy, such as coal, natural gas, gasoline, water flow, wind, electricity, sunlight, etc., we call them energy.
People's lives, production, and scientific research are all inseparable from energy. So what types of energy do we include, and how should we develop and effectively utilize them?
The first stage: artificial fire-firewood
Firewood is an energy source that is abundant and easily available.
Stage Two: Steam Engine
After the steam engine, human beings entered the industrial society. Human beings gradually replaced human and animal power with mechanical power. The main energy source of human beings shifted from firewood to coal.
Coal, oil, and natural gas were formed by animals and plants buried underground millions of years ago through a long period of geology. They are also collectively called fossil energy. Fossil energy is the main energy source for mankind today.
Energy that can be obtained directly from nature, such as fossil energy, is called primary energy.
Example
1. For example: the refrigerator needs to consume electricity. The consumed electrical energy becomes internal energy. Can this internal energy be recycled?
2. When the car brakes, due to friction, the kinetic energy is converted into the internal energy of the tires, the ground and the air. Can this consumed energy be used to drive the car automatically?
3. The stove transfers its internal energy to the air in the room for heating. In spring, can this internal energy be collected again and used again in the next year?
Fossil energy generates a large amount of internal energy, part of which is not utilized, causing thermal pollution.
Carbon dioxide emitted from fuel combustion exacerbates the Earth's greenhouse effect.
Impurities in fuel generate harmful substances such as sulfur dioxide when burned.
Incomplete combustion of fuel can generate dust and carbon monoxide to form acid rain
The use of energy must consider sustainable development, not only to meet the needs of contemporary people, but also to consider future generations.
1. Improve energy utilization and reduce environmental damage during energy use.
2. Develop new energy
Energy sources such as fossil energy and nuclear energy will be used less and less and cannot be replenished from nature in the short term. This type of energy is called non-renewable energy.
Wind energy, water energy, solar energy, etc. can be obtained continuously in nature and are called renewable energy sources.
Geothermal energy: It is natural heat energy extracted from the earth's crust and is a renewable energy source.
Biomass energy: The energy form of solar energy stored in biomass in the form of chemical energy, that is, energy with biomass as a carrier, is a renewable energy source
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