Factors to consider when purchasing a chiller

Factors to consider when purchasing a chiller

When purchasing a chiller, many users often think that the chiller is almost the same wherever it is used, and generally consider the price of the chiller. Some important factors when purchasing a chiller are often overlooked. The following editor summarizes the factors that users should consider when purchasing a chiller: building use; local water, electricity, and heat sources; the characteristics of the annual air-conditioning load distribution of buildings; initial investment and operating costs.

　　1. For the cold source of a large-scale central air conditioning system, it is advisable to choose a chiller with compact structure, small footprint, refrigeration compressors, condensers and other equipment assembled on the same frame.

　　2. Determine whether to use a water-cooled chiller or an air-cooled chiller based on the cooling water temperature, water volume, water quality, and the possibility of cooling equipment settings.

　　3. If there is a suitable heat source, especially a place with waste heat or waste heat or a place with a lack of electricity, then absorption chillers should be used.

　　4. Generally, 2 to 4 chiller refrigeration units should be selected, and 2 larger ones should be selected for medium and small scales. In short, it depends on the specific scale.

5. The total capacity of the electric chiller is: Qe=A1A2A3A4QAC KW where: A1-A4 are the correction factors; QAC-air conditioning design load, W or KW; for electric refrigeration, the chiller can be selected according to the air conditioning design load QAC, No additional is necessary.

　　6. ​​When choosing an electric-driven chiller, the corresponding type of chiller should be selected according to the cooling capacity range.

　　 When the single cooling capacity Q>1163kw, centrifugal type should be used;

　　 When the single cooling capacity Q=582-1163, centrifugal or screw type should be used;

　　 When the single cooling capacity Q<582kw, the piston type should be selected.

　　7. When choosing a chiller, you should consider its environmental pollution: noise and vibration must meet the requirements of the surrounding environment; the impact of refrigerant on the atmosphere.