As a typical heat exchanger, tubular condenser will naturally become an indispensable part of the refrigeration system, so if it is mismatched, it will certainly have a great impact on the whole system, which fully demonstrates the importance of scientific and reasonable matching of condenser. The following edition will analyze with you the impact of improper matching of tubular condensers. Firstly, if other devices such as compressors, evaporators and expansion valves remain unchanged in the complete refrigeration system under the same conditions, then the condenser with larger matching will change the condensation pressure and supercooling degree, and the condensation temperature may also decrease. It will not only waste condensation resources, but also cause damage to other settings.
Secondly, if the condenser is too large in the refrigeration system, not only the condensation pressure will decrease, but also the undercooling degree may decrease. Although it is advantageous to increase the condenser area appropriately to improve the unit efficiency, but the premise is to match with other devices, otherwise it will only be counterproductive.
That is to say, only when the condenser increases and the cooling water flow remains unchanged, the condensation temperature will decrease, but the change of condensation temperature has little effect on the cooling capacity compared with the change of evaporation temperature, so it is meaningful to increase the condensation water flow on the basis of increasing the condensation area. Since the condensation pressure of the condenser decreases, the temperature of the refrigerant at the inlet of the throttle valve can only be equal to the temperature of the heat transfer medium, even if the heat transfer capacity is greater. At this time, in order to increase the condensation pressure and add more refrigerants, it becomes only supercooling rather than condensation temperature.
For refrigeration system, increasing the heat transfer while increasing the condenser can not only reduce the condensation temperature and pressure of the condenser, but also reduce the pressure ratio and the exhaust temperature of the compressor. At the same time, it has a significant effect on improving the refrigeration capacity. So we must choose a suitable condenser.
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