Indusrial Chiller By Soxi: Always The Right Choice

What Is The Working Principal Of Soxi Water Chilling Units?

In refrigeration industry, industrial chillers usually be classified into air-cooled chiller and water cooled chiller. According to compressor, it can be classified into screw chiller, scroll chiller and centrifugal water chiller. If we classify it by temperature control, there are low-temperature water chiller and normal temperature chiller. Temperature range from 0-35℃ for normal chillers, while it is from -100-0℃ for Low temperature water chillers.

The chilling unit includes compressor, evaporator, condenser and expansion valve. It achieves refrigerating cycle by vapour compression. It usually used for air conditioning unit and industrial cooling such as plastic molding industry, electronics, electroplating, laser, printing, textile, chemical, packing, medicine, automobile and so on. Technically speaking, water cooled chillers are 300-500KCAL/H more efficient than air cooled chillers. But air cooled chiller is easy to install and portable, not require other accessories. While water cooled chiller requires external water cooling towers for cooling water circulation.

What Matters Should You Pay Attention To When Choosing Screw Water Chillers?

A screw water chiller is a type of industrial chilling equipment with a large cooling capacity, it is widely used in central air-conditioning and the large Refrigeration Industry for refrigerating and cooling purposes. it adopts a water circulation working principle that saves water. It generates chilled water as direct media for cooling industrial equipment and keeps its temperature at a low-temp state.

1. For chilling systems that have long hours of underloading operating conditions, it is suitable to choose a multi-head piston compressor or screw compressor unit, for easy adjustment and energy saving. That is a double-head screw water chiller, the chiller automatically determines numbers of head to power-on according to load changes. This enables the compressor to work under the optimum working condition, thus effectively saving electricity.

2. Give priority to units with a higher performance coefficient when choosing a screw water chiller. According to previous industry statistics, during one year,  full-load operation time is less than 25%.  The corresponding operation time to 100% ,75%,50%,25% load are 2.3%,41.5%,46.1%,10.1% respectively. So we need to choose screw chillers with a flat efficiency curve. In the meantime, we need to check the adjustable range.

3. We need to pay attention to working conditions when choosing screw chillers. The actual cooling capacity of the water chiller is related to a chilled water outlet temperature and flow rate, inlet temp. of cooling water, flow rate, and scaling factor.

4. We need also to pay attention to the normal work scope of the screw water chiller, the motor electrical current limit value is the shaft power current under nominal conditions.

5. Under nominal working conditions screw industrial chiller outlet temperature should be below 15℃,  air-cooled screw chiller outdoor dry-bulb temperature should be below 43℃. When it exceeds the before mentioned range, we should check if it is allowed by compressor application fields and if the motor power is enough.