Choosing the right chiller needs to focus on understanding the chiller’s refrigeration capacity, chilled water volume, thermal efficiency and water tank capacity, temperature control accuracy, water quality requirements, and material requirements for the water circulation system. The following data is the cooling capacity coefficient of performance of the chiller.
- The performance coefficient (COP) of piston / scroll chiller is as follows:
When the rated cooling capacity is less than 528KW, its COP should not be less than 3.8;
When the rated cooling capacity is 528 ～ 1163KW, its COP should not be less than 4.0;
When the rated cooling capacity is greater than 1163KW, its COP should not be less than 4.2.
- For screw-type chiller, the coefficient of performance (COP) is as follows:
When the rated cooling capacity is less than 528KW, its COP should not be less than 4.10;
When the rated cooling capacity is 528 ~ 1163KW, its COP should not be less than 4.30;
When the rated cooling capacity is greater than 1163KW, its COP should not be less than 4.60.
- For centrifugal chiller, the coefficient of performance (COP) is as follows:
When the rated cooling capacity is less than 528KW, its COP should not be less than 4.40.
When the rated cooling capacity is 528 ~ 1163KW, its COP should not be less than 4.70.
When the rated cooling capacity is greater than 1163KW, its COP should not be less than 5.10
- For evaporative cooling or air-cooled chiller / piston / scroll chiller, the coefficient of performance (COP) is as follows:
When the rated cooling capacity is less than or equal to 50KW, its COP should not be less than 2.40.
When the rated cooling capacity is greater than 50KW, its COP should not be less than 2.60.
- For air-cooled or evaporative-cooled screw chiller, the coefficient of performance (COP) requirements are as follows:
When the rated cooling capacity is less than or equal to 50KW, its COP should not be less than 2.60.
When the rated cooling capacity is greater than 50KW, its COP should not be less than 2.80.
- The comprehensive partial load performance coefficient (IPLV) requirements of water-cooled screw chiller are as follows:
When the rated cooling capacity is less than 528KW, its IPLV should not be less than 4.47.
When the rated cooling capacity is 528 ~ 1163KW, its IPLV should not be less than 4.81.
When the rated cooling capacity is greater than 1163KW, its IPLV should not be less than 5.13.
- The comprehensive partial load performance coefficient (IPLV) requirements for centrifugal water-cooled units are as follows:
When the rated cooling capacity is less than 528KW, its IPLV should not be less than 4.49.
When the rated cooling capacity is 528 ~ 1163KW, its IPLV should not be less than 4.88.
When the rated cooling capacity is greater than 1163KW, its IPLV should not be less than 5.42.
For air-cooled unit units with a nominal cooling capacity greater than 7.1kW, the energy efficiency ratio requirements are as follows:
When the air duct is not connected, the energy efficiency ratio is not less than 2.60.
When connecting the air duct, the energy efficiency ratio is not less than 2.30.
For water-cooled unit units with a nominal cooling capacity greater than 7.1kW, the energy efficiency ratio requirements are as follows:
When the air pipe is not connected, the energy efficiency ratio is not less than 3.00.
When connecting the air duct, the energy efficiency ratio is not less than 2.70.
- Use side: Refrigerant inlet / outlet water temperature is 12/7 ℃.
- Heat source side (or exothermic side): The water inlet and outlet temperature of water-cooled cooling water is 30/35 ℃, the dry-bulb temperature of air-cooled refrigeration air is 35 ° C, and the wet-bulb temperature of evaporative cooling air is 24 ° C.
- The fouling factor on the use side and water-cooled heat source side is 0.086m2. ℃ / kW.