☆ Product Name: Key Points for Product Selection of Screw Chiller Unit	☆ Product model: HC-450AD	☆ Brand: Hengde
☆ Product Category: Chiller	☆ Temperature control range:	☆ Product power: 450KW

Product Introduction

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Key points for product selection of screw chiller:
The main control parameters of screw chillers are refrigeration performance coefficient, rated cooling capacity, input power, and refrigerant type.
The selection of chiller units should be considered based on the cooling load and purpose. For refrigeration systems that operate under low load conditions for a long time, it is advisable to use multi head piston compressor units or screw compressor units for easy adjustment and energy saving.
When selecting a chiller unit, priority should be given to units with higher performance coefficient values. According to data statistics, the operating time of a general chiller unit under * * load accounts for less than 1/4 of the total operating time throughout the year. The proportion of operating time for * * *, 75%, 50%, and 25% loads within the total operating time is approximately 2.3%, 41.5%, 46.1%, and 10.1%. Therefore, when selecting chillers, priority should be given to models with relatively flat efficiency curves. At the same time, the adjustment range of the load of the chiller unit should be considered when designing and selecting. The multi head screw chiller unit has excellent partial load performance and can be selected according to actual conditions.
When selecting a chiller unit, attention should be paid to the nominal operating conditions. The actual cooling capacity of the chiller unit is related to the following factors:
a) Cold water outlet temperature and flow rate;
b) The inlet temperature, flow rate, and fouling coefficient of the cooling water.
When selecting a chiller unit, attention should be paid to the normal operating range of the unit model, mainly the current limit of the main motor is the current value of the shaft power under nominal operating conditions.
6. In design selection, attention should be paid to: under nominal operating flow conditions, the outlet temperature of cold water should not exceed 15 ℃, and the outdoor dry bulb temperature of air-cooled units should not exceed 43 ℃. If it is necessary to exceed the above range, it should be understood whether the usage range of the compressor is allowed and whether the power of the main motor is sufficient.