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Comparison Of Water-cooled Chiller And Air-cooled Chiller

Dec. 30, 2019

Air-cooled refrigeration units are suitable for small and medium-sized systems with tight water sources in the area. It is more advantageous to use air-cooled refrigeration units for refrigeration systems with longer operating hours. If the system is managed properly and the water supply is controlled below 3%, it is difficult to recover the initial investment of the air-cooled refrigeration unit compared with the water-cooled refrigeration unit. The following suppliers of China Industrial Water Chiller make a comprehensive analysis and comparison of air-cooled / water-cooled refrigeration units, and hope to be useful to everyone.


1. Water-cooled chiller units must be equipped with cooling towers. For open cooling circulating water systems, after the cooling water absorbs heat, it comes into contact with air, carbon dioxide enters the air, and dissolved oxygen and turbidity in the water increase, resulting in four major cooling circulating water systems. Problems: corrosion, scaling, bacteria growth, sludge. If water quality is not treated, refrigeration equipment will be severely damaged, heat exchange efficiency will be greatly reduced, and energy will be wasted. Therefore, it is very important to perform corrosion inhibition, scale inhibition, sterilization and algae treatment on the water system.

Water Cooled Chiller Machine cooling system must be installed with electronic water treatment equipment, or strong magnetic water treatment equipment, or the heat dissipation efficiency decays too much, the longer the use time, the worse the system's effect, the annual water treatment cost is high, and the effect cannot be achieved 100% descaling. The quality of cooling circulating water is the key. There are two types of physical and chemical methods for treating cooling circulating water.


Water Cooled Chiller Machine


Water Cooled Chiller Machine


2. Water-cooled / air-cooled chiller can be used in small systems, most of the large units are water-cooled. As far as the main investment of water cooling is concerned, it is a little less than air cooling. However, with the addition of cooling towers and electronic water treatment equipment in the equipment room, there is nowhere to go! Besides, in terms of long-term operation, the cooling efficiency of water-cooled units will relatively decline, and the drop in air cooling will be small.


3. The air-cooled chiller adopts air cooling method, which eliminates the cooling tower, cooling water pump and piping system necessary for the cooling water system, avoids condenser scaling and water pipe blockage caused by poor water quality, and saves water , Is the most economical and simple model for maintenance and repair of cold water air conditioning equipment products.

Air Cooled Chiller has a slightly higher one-time investment than water-cooled chiller, but the annual operating cost is lower than water-cooled chiller. The construction cost of the equipment room is the least among various air-conditioning cold and heat source systems. The maintenance cost is about water-cooled or Half the cost of the boiler. The air-cooled chiller has a larger noise and volume than water-cooled, and can only be installed outdoors. Water-cooled units are mostly installed in basements.


4. The service life of water-cooled chiller air conditioners is 15-20 years (water-cooled screw machines); the service life of air-cooled chiller air conditioners is 6-11 years.


The initial investment of air-cooled chiller is relatively high, and the power consumption per unit of cooling capacity is slightly higher than that of water-cooled chiller, but the annual comprehensive cost of air-cooled chiller is basically the same as that of water-cooled chiller. The longer the annual running time of the chiller, the more beneficial it is to the air-cooled unit, and the initial investment payback period of the air-cooled unit is shorter than that of the water-cooled unit. The amount of water supplemented by the cooling water of the water-cooled unit is an important factor affecting its cost. Strengthening maintenance management and reducing water consumption are important aspects of reducing the cost of water-cooled units.

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