What is a shell and tube condenser How can the chiller save more power

What is a shell and tube condenser How can the chiller save more power

Recently, some friends left a message to okmarts.com asking what is a shell and tube condenser? How to operate the chiller to save electricity? Today, the editor of okmarts.com will take you to learn more, and hope the following content can help you.

　　What is a shell and tube condenser?

Shell and tube condenser is a commonly used heat exchanger for water-cooled chillers. Shell and tube condenser is composed of shell, tube sheet, heat transfer tube bundle, cooling water distribution parts, cooling water and refrigerant inlet and outlet pipe joints, etc. A closed water-cooled condenser.

　　The shell of small condenser can choose thick seamless steel pipe. The shell of a large condenser must be welded with steel plate. The tube sheet is welded to both ends of the shell to form a complete shell. Many holes are processed on the tube sheet. After the heat transfer tube bundle penetrates the tube hole, both ends are connected to the tube sheet by expansion or welding, and have good air tightness.

　　Shell and tube condensers are mainly used in water-cooled chillers. According to the spatial orientation of the shell and heat transfer tube bundles, shell and tube condensers can be divided into vertical and horizontal types. But no matter which type it is, the cooling water is in the tube pass, and the refrigerant is in the shell pass, that is, the high-temperature, high-pressure refrigerant vapor cools, condenses and converges to the shell on the outer surface of the heat transfer tube. The reason for this arrangement is that the average heat transfer coefficient between the cooling water and the tube bundle is generally higher than the average heat transfer coefficient of the refrigerant vapor condensation, and the condensation requires a larger heat exchange surface; in addition, in order to make the high temperature, The pressure of the high-pressure refrigerant vapor is controlled within a certain range, which also requires a larger space.

In addition to the different spatial orientations, there is another important difference between vertical and horizontal shell and tube condensers. This is that there are water covers at both ends of the horizontal shell and tube condensers. The water cover and the shell are often connected by flanges. The cooling water is in a confined space. So horizontal shell and tube condenser is also called closed shell and tube condenser. The vertical shell and tube condenser is often located on a collecting basin, without water cover at the upper and lower ends, but with a water distribution tank at the upper end. After the cooling water is distributed by many water separators in the water distribution box, it enters each heat transfer switch, absorbs heat from the tube wall, flows out from the lower end, and falls in the collecting tank. Therefore, the vertical shell and tube condenser is also called an open shell. Tube condenser.

　　How to operate the chiller to save electricity?

　　In the lives of modern people, everyone advocates energy-saving, power-saving, environmental protection, saving existing energy consumption, and advocating the development of environmentally friendly new energy for the benefit of society. In the industrial chiller industry, how can the chiller operate more energy-efficiently? The three points of daily operation can make the chiller more energy-saving.

　　 1. Prevent and reduce the scale of industrial chiller pipes to improve the heat exchange efficiency of condenser and evaporator.

　　 Make-up water If the water treatment is not done well, the calcium carbonate and magnesium carbonate produced by the heating of calcium bicarbonate and magnesium bicarbonate will be deposited on the pipeline. The thermal conductivity is reduced, the heat exchange efficiency of the condenser and the evaporator is affected, and the electricity cost of the chiller operation is greatly increased. At this time, in addition to the use of water treatment technology, it is also possible to use regular automatic pipe cleaning equipment for pipe cleaning, which saves electricity and improves the cooling effect of the chiller.

　　 2. Adjust the reasonable operating load of industrial chillers.

　　In the case of ensuring the safe operation of the chiller, the power consumption per unit cooling capacity is smaller when the mainframe group runs at 70%-80% load than when it runs at 100% load. The operation of the water pump and cooling tower should be considered comprehensively when starting up in this way.

　　 Three, reduce the condensation temperature of industrial chillers.

　　 On the premise of meeting the safety and production requirements of the chiller, try to increase the evaporation temperature and reduce the condensation temperature. Therefore, it is necessary to increase the transformation of the cooling water tower to ensure the efficiency of the cooling water.

　　Industrial chillers can provide industrial chilled water for all walks of life. The applied chillers can be centralized, and each chiller can meet multiple needs for cooling, or be dispersed in each application or device with its own refrigeration equipment. Each method has its advantages. The more commonly used industrial chillers include: screw chillers, air-cooled chillers, water-cooled chillers, low-temperature chillers, open-type chillers, and chillers. How customers should choose a chiller suitable for their own company depends on the company. The actual demand of production equipment determines the model and model of the chiller.