The cooling tower is used for cooling. When cold water passes through the condenser for heat exchange, the water temperature increases. The high temperature water is cooled by the cooling tower and then passes through the condenser. heat exchange and so on.
There are several types of cooling water systems in power plants, some are circulating (as above), and some do not require a cooling tower and are returned directly to the river (for power plants near rivers)< /p>
In brief Can be reused
How to manage the cooling water of a nuclear power plant
The generator condenser turbine is equipped with a main condenser. The function of the circulating water is to cool the steam which does the work of the turbine through the condenser, cooling the steam into condensed water for recycling.lage. Circulating water also plays a role in cooling the lubricating oil. In addition, domestic firefighting water, industrial water and desalinated water from the power plant are all treated from the circulating water system.
What are the functions of diesel generator coolant?
Cooling water from nuclear power plants will be recycled.
The cooling fluid of the primary circuit is generally called heat transfer or moderator (neutron moderator). This is light water under pressure (ordinary water), since it is in contact with the reactor core. will be radioactive; the cooling water of the secondary circuit has the same function as an ordinary thermal power plant. It is heated and transformed into steam to produce electricity, and there is no radioactivity.
The third loop generally uses filtered river waterHaihe. After cooling the secondary loop, it is then discharged towards the coast or along the river. The discharged water does not contain radioactivity, but due to the release of. excess heat in the secondary loop, there is therefore thermal pollution in relation to the emission medium.
Under normal circumstances, when hot water enters the cooling tower to be cooled, only a small amount of steam comes out (white smoke), and most of the water can be recycled after being cooled, and it will be. is not radioactive.
The principle of nuclear power plants:
In a pressurized water reactor, a large amount of heat is generated by the auto chain fission reaction -maintenance of The nuclear fuel atoms and the coolant (also called heat transfer body) bring the heat from the reactor into the steam generator and transfer it toits working fluid, water.
Next, the main circulation pump returns the coolant to the reactor for recycling, thus forming a loop, called the first loop. This process is the energy conversion process in which nuclear fission energy is converted into thermal energy.
The working fluid on the secondary side outside the U-shaped tube of the steam generator is heated and evaporates to form steam. Steam enters the steam turbine and expands to do work, converting the thermal energy released by it. the enthalpy drop of the steam in the mechanical energy of the rotation of the steam turbine rotor. This process is called energy conversion process in which thermal energy is converted into mechanical energy.
Reference for the above content: Baidu Encyclopedia - Nuclear Power Plant
During operation of the generatordiesel engine, the influence of its own diesel combustion will cause the temperature of the diesel engine to increase sharply. In high temperature environments, it will not only affect the improvement of the working efficiency of diesel generators and may even cause parts failure. Based on this, we need to cool the heated parts, which involves adding coolant to the diesel engine cooling system. What role does coolant play in the diesel engine cooling system? What are the operating functions of fuel oil generator sets?
First, the antifreeze effect. To ensure that the diesel engine cooling system will not be damaged by freezing when the temperature is too low, generally speaking, the commonly used coolant antifreeze temperature is between minus 20 degrees and 45 degrees, this who can bereasonably selected according to the actual needs of different regions.
Second, the anti-boiling effect. It is guaranteed that premature boiling will not occur under high temperature conditions. The boiling point of commonly used coolant is 104 to 108 degrees. When coolant is added to the cooling system and pressure is generated, its boiling point will be higher.
Third, antiseptic effect. Special coolant can reduce the corrosion of the cooling system, thereby avoiding water leakage problems caused by corrosion of the cooling system.
Fourth, anti-rust effect. High quality coolant can prevent rust in the cooling system. Once the cooling system is rusted, it will cause accelerated wear and reduce the efficiency of heat transfer.e heat.
Fifth, anti-limescale effect. Since the coolant uses deionized water, it can avoid scale and precipitation and achieve the purpose of engine protection.