How to judge the chilled water flow of the chiller | Oumalchiller.com

 Generally speaking, everyone will have doubts when purchasing a chiller. I don't know how to judge the chilled water flow of the chiller? From what aspects should the water flow of the chiller be considered? Today I would like to share with you four suggestions:

1. Detection of return water temperature and outlet water temperature of the chiller (the unit needs to be in normal state):

30 minutes after starting up the unit, you can read the temperature of the inlet and outlet water when the unit is running through the parameters of the unit's control system or the inlet and outlet water thermometers of the unit's chilled water system. The difference should be ensured to be about 4-6 degrees. If the water temperature difference is too large, it means that the water flow of the water system through the plate type device is too small, which may cause the unit to fail to operate normally or be damaged.

2. Water pressure detection of the inlet and outlet pipes of the chiller unit:

Through the detection of the return water pressure and the water outlet pressure value, check the water flow rate of the chiller under the pressure difference between the inlet and outlet water in the random manual of the unit. In order to judge whether the water system is normal; and through this difference to judge which section of the water pipeline resistance value is too large, and make corresponding rectification plans and actions.

3. Detection of the suction temperature of the copper tube of the compressor (only in the cooling operation):

If the suction temperature of the compressor is detected to be lower than 0 degrees after the refrigerating chiller is turned on for 30 minutes, it means that the water flow in the water-side heat exchanger is insufficient, resulting in a drop in the evaporating temperature and evaporating pressure, and causing freon to flow in the direction of the evaporator. The suction pipe of the compressor is still evaporating and absorbing heat, which will cause the suction temperature of the compressor to be lower than 0 degrees; in addition, it is necessary to eliminate the drop of evaporating pressure and evaporating temperature caused by the low water temperature set point; The low water temperature unit can be considered normal as long as the compressor has a suction superheat of 6 to 8 °C. Therefore, under normal water flow, the suction temperature of the compressor will generally be greater than 0 °C, below this value, the problem of the water system needs to be eliminated.

4. Water pump running current detection:

By detecting the running current of the chiller water pump and comparing it with the rated current, it can be judged whether the actual water flow rate is larger or smaller than the rated water flow rate of the water pump. Only by making a comprehensive judgment with the previous parameters can an exact water system detection and analysis be obtained. Judgment report.