Coolers and condensers are one of the important parts of the heat exchange process in the chiller refrigeration equipment heat exchange equipment, and its utilization rate is a very high product. The difference between the cooler and the condenser in the design is the presence or absence of phase change, the difference in heat transfer coefficient, and the series heat exchanger.
(1) With or without phase change
The condenser condenses the gas phase into a liquid phase, and the cooler cooling water cools. There is no phase change, just a simple temperature change. In addition, they use different cooling media. The cooler is used to cool the material without phase change. The condenser is used to cool and condense the gas phase, and has a phase change.
(2) Different heat transfer coefficients
Generally speaking, the heat transfer film coefficient in the condensation process is much larger than the cooling process without phase change. The total heat transfer coefficient of the condenser is generally much larger than the simple cooling process, and sometimes it is an order of magnitude larger. The condenser is generally used to cool the gas into a liquid. The shell of the condenser is usually very hot, and the concept of the cooler is relatively broad. It mainly refers to the heat exchange equipment that converts the hot cold medium into room temperature or a lower temperature.
(3) Tandem heat exchanger
In general, the condenser with a large inlet and a small outlet is the condenser, and the same diameter is usually a cooler, which can be easily seen from the shape of the instrument.In the case of two heat exchangers connected in series, the latent heat is much higher than the sensible heat at the same mass flow rate. Under the same heat exchanger type, the larger heat exchange area is the condenser. The condenser is a heat-exchanging device that absorbs the heat of vaporous materials and condenses them into liquid materials. There is a change in phase state, and the change is quite obvious.The cooling medium can absorb heat directly or indirectly from the condensed medium, but there is no change in phase change. The cooler only reduces the temperature of the medium to be cooled without phase change. The cooling medium in the cooler does not directly contact the medium to be cooled, and heat is transferred by using a tube or jacket. In addition, the general cooler has a more complicated structure than the condenser.