The core problem of compressor oper
Precautions for compound evaporative cooling system in air conditioner
The composite evaporative cooling system is a composite system that organically combines the evaporative cooling device and the compression refrigeration and air conditioning system, and is to better achieve the purpose of comfortable air conditioning and energy saving and environmental protection. The compound evaporative cooling system has stronger regional applicability, and it has many forms. The direct evaporative cooling system cools the airflow of the air-cooled condenser in the mechanical compression refrigeration system, and the indirect evaporative cooling system pre-cools the fresh air in the mechanical refrigeration air-conditioning system. , And the composite system of multi-stage evaporative cooling system and mechanical refrigeration and air conditioning are all forms of composite evaporative cooling system.
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The industry has produced evaporative condensers that are used with water chillers. Through evaporative cooling, the temperature of the wet bulb of the air entering the condenser is reduced, and the lower temperature air exchanges heat with the refrigerant through the condensing coil to condense it. In this way, the condensation temperature of the working fluid is reduced, the refrigeration performance of the system is improved, and the energy consumption is reduced. Experiments have proved that the energy consumption of this type of condenser is about 1/3 to 1/4 of that of water-cooled condensers, and the water consumption is only 1/10 of that of water-cooled condensers, and it has a compact structure, low maintenance costs, and has a good market prospect.
Which form of compound evaporative cooling system to choose should be decided according to the local climatic conditions, the load characteristics of the building, the comfort requirements of the human body, and the specific operating conditions of the system. For example, using an indirect evaporative cooling system as the fresh air pre-cooling device of an air conditioner may not achieve energy saving effects, mainly because the fans and water pumps of the indirect evaporative cooling device itself also consume energy, when the temperature difference between the dry and wet bulbs of the outdoor air is not large enough, or When the fresh air ratio does not reach a certain value, the fresh air pre-cooling capacity may be less than the energy consumption of the indirect evaporative cooling device itself, so the total energy consumption of the system will increase instead.
Because the climatic conditions and the thermal environment of the building are different, the critical fresh air ratio is different in each place. Therefore, before using the compound evaporative cooling system to pre-cool the fresh air, s* must first check the surrounding environment and the energy consumption of the system Conduct feasibility analysis.
