In the chiller refrigeration system, there will be compressors, AIR COOLED CONDENSER, evaporators, expansion valves and refrigerants. With the addition of these originals, a good refrigeration system will be formed. Today, I will tell you the difference between AIR COOLED CONDENSER and cooler in design.
Nowadays, AIR COOLED CONDENSER and cooler are one of the important parts of the heat exchange process in the heat exchange equipment of the chiller refrigeration equipment, and the usage rate is very high. But people don't know the difference between AIR COOLED CONDENSER and cooler in design. Next, we will mainly talk about this aspect.
There are three main differences between AIR COOLED CONDENSER and cooler in design. The first point is whether there is a phase change, the second point is the difference in heat transfer coefficient, and the third point is the series heat exchanger. Let's talk about these three points in turn.
The first point is whether there is a phase change; AIR COOLED CONDENSER will condense the gas phase into a liquid phase, and the cooling water of the cooler is only cooling, there is no phase change, just a simple temperature change; in addition, the cooling medium they use is not too Same. There are also different uses. The cooler is used to cool the material without 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, since 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 AIR COOLED CONDENSER is generally much larger than that of the simple cooling process. , sometimes an order of magnitude larger. AIR COOLED CONDENSER is generally used to cool gas into liquid. Generally, the outer shell of the condenser will be very hot, and the concept of the cooler is relatively broad, mainly referring to the conversion of the hot cold medium to room temperature or a lower temperature. thermal equipment.
The third point is the series heat exchanger; if there are two series heat exchangers, how to distinguish the condenser and the cooler? Under normal circumstances, the large inlet and the small outlet are the condenser, and those with the same diameter are generally coolers, which can be easily seen from the shape of the device.
In addition, when two heat exchangers are connected in series, under the same mass flow rate, the latent heat is much higher than the sensible heat. Under the same type of heat exchanger, the larger heat exchange area is AIR COOLED CONDENSER. That is, the larger one should be the condenser.
AIR COOLED CONDENSER is a heat exchange device that absorbs the heat of vaporous materials to condense them into liquid materials. There are phase changes, and the changes are quite obvious. The cooling medium can absorb heat directly or indirectly from the condensed medium, but without a phase change. The plate cooler only reduces the temperature of the cooling medium without phase change. The cooling medium in the cooler is generally not in direct contact with the medium to be cooled, and heat is transferred by tubes or jackets. In addition, coolers are generally more complex than condensers.