Why are primary and secondary water systems required in a cooling water system?

Primary water is generally used in situations where temperature control is required as described in the equipment specifications, or when the heat transfer properties of the oil are good. As for secondary water, it is used when the heat transfer properties of the oil are poor, or when the temperature of the medium cannot be cooled directly – such as in the case of the temperature at the outlet of vacuum residue. Secondary water must be used for cooling. You can analyze it; for example, when water is heated, the hot water rises, right, while the cold water moves downward. What if the same water is used? Right, the oil is cooled by water once, but a sticky layer forms on the inner wall of the pipe, preventing heat transfer; as a result, the interior of the pipe cannot be cooled, and heat transfer does not occur effectively, which in turn leads to poor heat exchange.

I’m not entirely sure what exactly is meant by \"primary water\" and \"secondary water\". In our system: Primary water refers to fresh water, that is, water that comes directly from the city’s water supply network or from alternative water sources. Secondary water is industrial recycled water, which is obtained by treating primary water through processes such as chemical addition, flocculation, sedimentation, filtration, and scale prevention, after which it can be reused. Reused water refers to wastewater that has undergone biological treatment and meets secondary discharge standards. For your reference!

Water in this context generally refers to well water, which has a lower temperature and is used in situations where a lower temperature is required. Secondary water generally refers to circulating water, which has a higher temperature than primary water and is used in general cooling equipment.

Personally, I understand that primary water refers to water that is used only once without being recycled, while water that can be sent to other applications with lower cooling requirements is considered secondary water; secondary water can also be recycled water.

Secondary water, also known as recycled water, can improve water utilization efficiency and save water resources; however, its cooling effect is not as good as that of primary water.

Turbine: A machine that converts the energy contained in a fluid into mechanical work. Also known as a turbine or turbine. The main component of a turbine is the rotating element, which is mounted on the turbine shaft and features blades arranged evenly around the circumference. The energy possessed by the fluid is converted into kinetic energy as it flows through the nozzle; as the fluid passes over the rotor, it impacts the blades, causing the rotor to rotate and thereby driving the turbine shaft to spin. The turbine shaft drives other machinery directly or through a transmission mechanism to deliver mechanical work. Turbines can be classified into hydroturbines, steam turbines, gas turbines, and air turbines, depending on the working fluid used. Turbine compressor: Introduction to turbine compressors: A turbine compressor is a dynamic compressor equipped with a high-speed rotating impeller. A turbine compressor increases gas pressure by relying on the force of interaction between the rotating impeller and the gas flow; this causes the gas flow to accelerate and gain kinetic energy. The gas flow then slows down in the diffuser, converting its kinetic energy into pressure energy, thereby further increasing the pressure. During compression, the gas flow is continuous. The turbo compressor evolved from the ventilator. Applications of turbine compressors: Turbine compressors are widely used in various process systems to transport air and various gases and to increase their pressure. The rewatering unit is also known as a condenser or cooling unit. Based on the information provided by the original poster, it is likely that primary water and secondary water are used to cool the steam. It is certain that primary water and secondary water are provided in order to make full and rational use of water resources and save water. In terms of design, when considering primary water and secondary water, the first factor to take into account is water temperature, followed by water flow rate and velocity, in order to determine the specifications of the heat exchanger to be designed ； The water quality also needs to be determined in order to identify the materials to be used in the design along with other media. This post was last edited by huamei461112 on 2009-2-23 21:24.]