1. Heat transfer coefficient
Generally speaking, the heat transfer film coefficient of the condensation process is greater than that of the cooling process without phase change, and the total heat transfer technology of the cooler is much larger than that of the simple cooling process. The condenser cools the gas into a liquid, and the whole process releases heat, so the temperature of the condenser will increase.
The cooler is a kind of heat exchange equipment that adjusts the hot cold media to the indoor temperature or lower temperature, which is generally used in various industries such as machinery, electricity, metallurgy, chemistry, refrigeration and so on.
Oil cooler is divided into air cooler and water cooler, their working principle is the same, with cold medium and hydraulic oil exchange heat, so that the oil temperature down, so that the equipment works normally, improve production efficiency.
In the cold water system, there are compressors, condensers, evaporators, expansion valves and refrigerants. With the addition of these components will form a good refrigeration system. Today, Jiuqi Xiaobian will tell you what are the differences between condenser and cooler in design.
Nowadays, condensers and coolers are one of the important components of the heat exchange process in the cold water mechanism cold equipment heat exchange equipment, and the utilization rate is very high. However, people do not understand the difference between the condenser and the cooler in the design, and then we will mainly talk about this aspect.
The difference between the condenser and the cooler in the design is mainly three points, the first point is that there is no phase change, the second point is the difference in the heat transfer coefficient, and the third is the series heat exchanger. Here are the three in turn.
The first point is whether there is a phase transition; The condenser will condense the gas phase into the liquid phase, and the cooling water of the cooler is only cooled, without phase change, but simply changes in temperature. They also use different cooling media. The use is also different, the cooler is used to cool the material, no phase change. The condenser is used to cool and condense the gas phase, and there is a phase change.
The second point is the difference in heat transfer coefficient; Generally speaking, because the heat transfer film coefficient of the condensation process is much larger than that of the cooling process without phase change, the total heat transfer coefficient of the condenser is generally much larger than that of the simple cooling process, sometimes an order of magnitude larger. The condenser is generally used to cool the gas into a liquid, the condenser shell will be very hot, and the cooler concept is relatively wide, mainly refers to the hot cold media into room temperature or a lower temperature of a heat exchange equipment.
The third point is the series heat exchanger; If there are two heat exchangers in series, how to distinguish between the condenser and the cooler? Under normal circumstances, the big mouth into the small mouth is the condenser, the same caliber is generally the cooler, which is easy to see from the shape of the instrument.
In addition, when two heat exchangers are connected in series, in the case of the same mass flow rate, because the latent heat is much higher than the sensible heat, and the type of heat exchanger is the same, the larger heat exchange area is the condenser, that is, the larger one should be the condenser.
Condenser is a heat exchange equipment that condenses steam materials into liquid materials by absorbing heat. There are phase changes, and the changes are quite obvious. The cooling medium can absorb heat directly or indirectly from the condensed medium, but there is no change in phase transition. The plate cooler only reduces the temperature of the cooled medium without phase change. The cooling medium in the cooler is generally not in direct contact with the cooling medium, and the heat transfer is done with a tube or jacket. In addition, the general cooler is more complex than the condenser.
Condenser and cooler are now one of the important parts of the heat transfer process of refrigeration equipment, many people use more, but what are the differences between condenser and cooler? What are the differences between condenser and cooler design? One of the differences between a condenser and a cooler is that there is no phase change. As the name suggests, the condenser will condense the gas phase into the liquid phase, and the cooling water of the cooler is only cooled, there is no phase change, but a simple temperature change; They also use different cooling media. The use is also different, the cooler is used to cool the material, no phase change. The condenser is used to cool and condense the gas phase, and there is a phase change. The difference, so to speak, is the presence or absence of a phase transition.
Generally speaking, because the heat transfer film coefficient of the condensation process is much larger than that of the cooling process without phase change, the total heat transfer coefficient of the condenser is generally much larger than that of the simple cooling process, sometimes an order of magnitude larger. The condenser is generally used to cool the gas into a liquid, the condenser shell will be very hot, and the cooler concept is relatively wide, mainly refers to the hot cold media into room temperature or a lower temperature of a heat exchange equipment. The two heat exchangers in series, how should we distinguish the condenser and the cooler? Under normal circumstances, the big mouth into the small mouth is the condenser, the same caliber is generally the cooler, which is easy to see from the shape of the instrument.
In addition, when two heat exchangers are connected in series, in the case of the same mass flow rate, because the latent heat is much higher than the sensible heat, and the type of heat exchanger is the same, the larger heat exchange area is the condenser, that is, the larger one should be the condenser. The condenser is a heat exchange equipment that condenses the steam material into liquid material by absorbing the heat of it. There are phase changes, and the changes are quite meditative. The cooling medium can absorb heat directly or indirectly from the condensed medium, but there is no change in phase transition. The cooler only reduces the temperature of the cooled medium without phase change. The cooling medium in the cooler is generally not in direct contact with the cooling medium, and the heat transfer is done with a tube or jacket. In addition, the general cooler is more complex than the condenser. Personally, I believe that the condenser design should consider the flow rate, the inlet flow rate limit, and the cooler should consider the pressure drop. Of course, the same equipment can be both a condenser and a cooler, depending on whether the working condition is suitable.
1) The cooler has no phase change, and the condenser has phase change, and the pipeline in and out of the cooler does not change, generally the difference between the inlet and outlet of the pipe diameter, and the diameter of the pipe in and out of the condenser changes greatly, which is relatively easy to see
2) Generally, there is a different setting of the baffle between the two, the condenser is set around, the cooler is set up and down, and the heat transfer coefficient is different.
3) There is a level gauge and level control port on the intercooler and no condenser; The inlet and outlet of the intermediate cooling are at the upper part of the container and the diameter of the pipe is basically the same, while the outlet of the condenser is at the bottom of the container, and the diameter of the pipe is very different from the inlet. The inlet and outlet of the cooled ammonia liquid are under the container, while the inlet and outlet of the condenser are not, the vertical one is generally on and off, and the horizontal one is at one end of the container.
The phase change is the condenser, otherwise it is the cooler; Condenser because the gas enters the condenser from the upper part, there is a condensing surface, and after the gas enters, it is all concentrated in the upper part of the condensing surface, so the baffle should be set left and right, so that the condensed liquid can extend the residence time and continue to cool down. After the cooler is fed, in order to efficiently utilize the area of the heat exchanger, the baffle is set up and down to fill the cooler with the medium that needs to be cooled.