It depends on the application conditions. Taking hydroelectric generators as an example, if the water quality is good, river water is usually used for cooling, eliminating the need for water circulation cooling. If water quality is poor, circulating water cooling should be used to avoid clogging the equipment. If equipment requirements are high, the cost of supporting equipment such as circulating water + industrial desalination may be higher.
What is the work content of the power plant chemistry major?
(1) Hydropower generation: when water (having potential energy) at a high place flows to a low place, the potential energy is converted into kinetic energy. At this time, the hydraulic turbine installed in the lower part of the watercourse turns thanks to the kinetic energy of the pushing water flow.t the blades (mechanical energy if the hydraulic turbine is connected to a generator). , it can drive the generator to rotate and convert mechanical energy into electrical energy. This is the principle of hydroelectric production. Hydropower can generally be divided into electricity generation from rivers, dams (reservoirs) and pumped storage. Pumped power generation releases water from a reservoir to generate electricity during the day when electricity demand is at its peak, and uses the excess electricity to pump the water up to the reservoir at night (electrical energy is converted into potential energy) to produce electricity during the day. when electricity demand is at its peak. Advantages ---- 1. Quick response --- Just open the water gate and feed it into the high pressure steel pipe
to start generating electricity. 2. Clean ---unlike thermal energy and nuclear energy which produces waste or waste
There are no problems or disadvantages in cooling water ---- 1. Dam 'water
It is easy to cause environmental and soil and water conservation problems 2 Suitable for location
Short-term river emergency in Taiwan< /p>
Although there are many hydroelectric power plants
, the electricity production capacity is quite low (2) Thermal. electricity generation: the use of thermal energy generated by the combustion of coal, oil, liquefied natural gas, and other fuels, allowing water to be heated and converted into steam. Under constant heating, water is transformed into steam at high pressure and high pressure. then the energy of this high temperature and high pressure steam is used to operate the steam turbine to drive the generatorr in order to produce electricity. In addition, power generation by internal combustion engine is also a type of thermal power generation. Typically, an internal combustion engine (engine) powered by diesel fuel is used to drive a generator to produce electricity. This method of generating electricity is mainly used on isolated islands with low energy consumption, or as backup generators in buildings and factories. Advantages ---- 1. The generator set can be overloaded - when the power supply is tight
It can be overloaded without tripping easily 2. It is less affected by the region
As long as there is fuel Disadvantages of power generation ----- 1. Air pollution problem 2. Cooling water temperature and drainage problem 3. Power source problem fuel ---- especially in Taiwan
Raw materials mustt be imported
< p> The biggest advantage: zero emissionsWill not pollute the air Second: use renewable energy
Reduce costs
The subject of power plant chemistry is part of the applied chemistry branch, its main research object is the analysis and treatment of chemical phenomena and chemical media in the process of power generation. This ensures the normal chemical working conditions of power generation and power supply equipment, and ensures the safe and economical operation of power generation and power supply equipment from a chemical point of view. In a thermal power plant, the boilerThe chemical energy of coal is converted into the potential energy of water vapor. The high temperature and high pressure water vapor rotates the steam turbine at high speed to generate mechanical energy, resulting in the rotation the generator. magnetic lines of force to generate electrical energy. A hydroelectric power plant uses the kinetic energy of water flow to directly drive a turbine to drive a generator. The electrical energy generated by the plant is then transported to users through transformation and distribution. In the process of electricity production and supply, many chemical media are used, accompanied by complex chemical phenomena, which play an important role in production equipment and processes. The main chemical fluids are: working fluid (water, fuel, steam), cooling fluid (water, mineral oil, hydrogen), insulating fluid (mineral oil, sulfur hexafluoride, air, insulating paper), lubricating fluid (mineral oil ), transmission. media (mineral oil, anti-fuel oil) and chemical agents (water treatment agent, maintenance agent dismantling of unitees, various chemical additives), etc.
The work content of chemistry major includes chemical system operation and chemical technical supervision, mainly including external furnace water treatment (feed water treatment) , furnace water calibration treatment, circulating cooling water treatment, generator internal cooling water treatment. and treatment of condensation water. Supervision of water and steam systems, corrosion and protection of thermal equipment, production and supervision of hydrogen, analysis and supervision of oil quality, SF, analysis and supervision, analysis and supervision of fuels, etc. It can be seen that the work content of the power plant chemistry major covers the entire process of power generation.