Evaporative Condensers
Evaporative condensers spray water on the outer surface of the condenser tubes in order to cool the refrigerant vapor inside. Evaporative condensers are a form of recycling water cooled condenser. They combine the strategy of the air cooled condenser, cooling tower. In these devices, hot refrigerant tubes are placed inside the similar draught cooling tower. Centrifugal fans force air through the tube surfaces to remove energy within a reasonable thermal processes.
With greater temperature difference exists between the atmosphere, passing through evaporative condenser and hot vapours refrigerant flowing through the pipelines, air feels a greater increase in temperature than passing through the tower. As the air passes through evaporative condenser pump-spray water over the hot refrigerant pipes. This design allows the water to absorb large quantities of latent heat from the refrigerant, as it evaporates. Therefore, in addition to having a more sensible heat transfer rate, evaporative condenser experience latent heat transfer rate similar to the tower.
The combination of these policies reduces die saturation temperature of the refrigerant lower limit DB ambient temperature. The increase of the sensible heat transfer decreases with increasing temperature experienced by the water, thus increasing the efficiency of evaporative condensers over other type condenser.
Because the evaporative condenser water-cooled condenser and cooling tower integrated, its thermodynamic processes are similar. Evaporating water removes a lot of heat in die refrigerant vapor through latent heat process. Therefore, die evaporation rate is a function of the WB, the temperature of the atmosphere input capacitors housing. Die atmosphere comes evaporative condenser, heated die energy is transferred from the refrigerant tubes. This process increases the efficiency of heat transfer to die evaporative condenser.
Evaporative condensers differ from the cooling towers in their pump power requirements. Since the water in the evaporative condenser is limited to its body, it only has to be pumped close to the sump to the spray. Thus, the capacity of the pump shall be reduced proportionately. Similarly, because the amount of water required by the system decreases, chemicals and flushing the requirements of the equipment are also reduced. The only disadvantage of the evaporative condenser systems die increased refrigerant requirements and related expenses, potential problems with the return of oil by increasing the pipelines required for these systems, and greater potential for leaks due to the large number of fittings and tube length...
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Industrial