dyyseo
chilled water system

How to judge the chilled water flow of the chiller?

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.


100 HP Air cooled chiller


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.


阅读全文......

How to use the chiller simply and correctly?

Industrial Chillers are widely used, providing cooling water systems for industrial production and helping companies improve product output and quality. Therefore, we need to understand how to use chillers simply and correctly to avoid problems during use and delay production. Let us briefly understand the use of chillers from the following aspects.


One: the protection of the chiller:

1. Check whether the voltage is normal, lack of phase,

2. Check and record the running current.

3. Measure and record whether the high and low pressure and temperature control temperature are normal.

4. Under normal conditions, the high pressure is 1.5MPa / the low pressure is 0.45MPa4 Check whether the interlocking control circuit device is loose and aging.

5. Check whether the oil level and oil temperature are normal.

6. Check the compressor for abnormal sound and abnormal vibration.

7. Refrigerant system test.

8. Overall commissioning and testing.

9. Regularly check whether the quality of the chilled water and cooling water is normal. When the water quality of the water source becomes dirty or degenerated, please replace the water source in time.


Two: The annual maintenance of the chiller is as follows:

1. Clean the condenser (every six months of cumulative operation)

2. Cleaning the cooling tower (the water-cooled chiller should be cleaned once every three months after accumulative operation)

3. Check the refrigeration oil and lubricating oil system, and replace and supplement the industrial chiller if necessary.

4. Check the circuit system of the water chiller system.

5. Compressor motor coil insulation test for industrial chillers.

6. Check whether the filter drier is normal or not, and replace it if necessary.


Three: the precise use of chillers knowledge:

7. Check the amount of refrigerant and replenish refrigerant in time.

8. Check and correct the high and low pressure switches.

9. Check and calibrate the thermostat.

10. Test run and general calibration, test whether the superheat is normal and whether there is abnormal sound of each component.


Generally, water cooling (that is, natural water and water tower cooling methods) cannot achieve high precision and high efficiency.

screw air chiller


The purpose of temperature control, because natural water and cooling tower heat dissipation are inevitably affected by natural air temperature, the water temperature in winter is low in summer, and the water temperature is high in summer. If the air temperature is 30°C, it is almost impossible for the water temperature to reach 10°C, so it is extremely unstable to control in this way. The water chiller is completely different from the general water cooling equipment, because the chiller has a completely independent refrigeration system, which will never be affected by the temperature and the environment. The purpose of high-efficiency temperature control. The chiller is equipped with an independent water circulation system, and the water in the chiller is recycled, which can save a lot of water. Therefore, industrial production is inseparable from industrial chillers. Oumal specializes in the production of industrial chillers to help companies provide industrial chilled water system solutions. Contact us if you are looking for a solution for your industrial chilled water system.


阅读全文......