1-1 What types of energy are known to man? And explain its characteristics.
A: First, mechanical energy. It includes solid-fluid kinetic energy, potential energy, elastic energy and surface tension energy. One kinetic energy and potential energy is the earliest known energy, known as the macro-mechanical energy.
Second, heat energy. It is the composition of the micro-atoms and molecular vibration and the kinetic energy of the movements, and its macro measurements are the temperature level, reflecting the object atoms and molecular operation strength.
Third, chemical energy. It is a kind of material structure energy, that is, outside the nucleus chemical molecules released energy, the use of the most common chemical energy is burning carbon and hydrogen, and these two elements are coal, oil, natural gas and other fuels in the most important combustible element.
Fourth, radiation energy. It is the material in the form of electromagnetic waves emitted energy. Such as the Earth's surface is acceptable to the solar energy is a kind of radiation.
Fifth, nuclear energy. Which is stored in the nucleus of the inter-particle interaction between atoms cause release of energy. There are two kinds of nuclear reactions that release huge nuclear energy. nuclear fission and nuclear fusion reactions.
Sixth, electrical. It is an energy associated with the flow and accumulation of electrons, usually from the chemical energy in the cell. Or by mechanical energy conversion from the generator; the other hand, electric energy can also be converted into light by the light, the motor is converted to mechanical energy, which shows the power to do the work of power.
1-2 What are the energy classification methods? The characteristics of electric energy and its role in the national economy?
A: According to the method of access it is divided into primary energy and secondary energy; Second, according to the degree of use it is divided into conventional energy and new energy;
Three, according to the regeneration can be divided into renewable energy and non-renewable energy; four, according to the nature of the energy itself is divided into energetic energy and process energy.
Energy characteristics: easy to mass production and long-distance transport; easy conversion easy to control; loss of small; high efficiency; no gas and noise pollution.
With the development of science and technology, the application of electric energy not only affects all aspects of social material production, but also more and more extensive penetration into every aspect of human life. Electrification degree has also become an important indicator of the level of development of social civilization.
1-3 Classification of thermal power plants, the power production process and its characteristics?
A: By fuel: coal-fired power plants; fuel power plants; gas power plants; waste heat power plants.
Super-critical pressure power plants; Sub-critical pressure power plants;
According to the original motivation points: gas condensate turbine power plant; gas turbine power plant; internal combustion engine power plant and steam - gas turbine power plant.
According to the output energy: condensing gas power plant; thermal power plant.
According to the total installed capacity of power plants: small-capacity power plants; medium-capacity power plants; large and medium capacity power plants; large-capacity power plants.
Thermal power plant production process is summed up in the coal containing chemical energy into electrical energy process. The whole production process
