What are the common solutions to high pressure faults in liquid chiller?
Due to insufficient cooling water output, the rated water output cannot be reached. The specific manifestation is that the water pressure difference between the inlet and outlet of the generator unit decreases, and the temperature difference increases. The reason for insufficient water output is due to insufficient water or gas in the system software. The solution is to install an automatic exhaust valve at a high altitude in the pipeline to carry out the exhaust pipe;
If the pipeline filter is blocked or used too fine, and the water permeability working ability is limited, suitable filtering devices should be used and the filter screen should be cleaned on time; The centrifugal water pump adopts a smaller size and does not have supporting facilities with the system software. Excessive refrigerant addition.
This type of situation usually occurs after maintenance, mainly manifested as high working pressure and balanced working pressure of the suction and exhaust pipes, and high operating current of the refrigeration compressor. The air should be deflated according to the working pressure and balanced working pressure of the suction and exhaust pipes and their operating current under rated operating conditions until everything is normal, so it is still necessary to check on time.
Fouling or blockage of the cooler. Condensed water is generally used as drinking water, and it is very easy to accumulate scale above 30 ℃. Moreover, because the fiberglass cooling tower is open and immediately exposed to the air, dust and dirt can easily enter the cooling system, resulting in dirty and blocked coolers, small total heat transfer area, low efficiency, and also endangering water output.
The main manifestation is that the water pressure difference and temperature difference between the inlet and outlet of the generator set increase, and the temperature on both sides of the liquid cooler is very high when touched by hand. The copper pipes of the liquid cooler discharge air conditioning become hot. The generator unit should be cleaned on time, and chemical water treatment scale cleaning should be carried out when necessary. The cooling temperature is high, and the actual cooling effect is not good.
The rated operating temperature of the cooling circulating water specified by the chiller unit is between 30-35 ℃, with high temperature and poor heat discharge, which will inevitably cause high working pressure of the cooling system. This type of condition usually occurs during high temperatures.
The reason for the high temperature may be: common faults in fiberglass cooling towers, such as the centrifugal fan not turning on or even flipping, and the rotating nozzle not rotating, mainly manifested by the high temperature of the cooling circulating water and rapid increase; The external average temperature is high, the water channel is short, and the water flow rate of the recyclable system is low. In such situations, the temperature of the cooling circulating water is generally maintained at a high level, and the method of raising the storage tank can be used to deal with it.
A water chiller is different from ordinary tap water refrigeration equipment. As it has a separate refrigeration unit, it must not be affected by the average temperature and natural environment. The temperature can be adjusted and controlled within the range of 5-30 ℃, thus achieving the goal of high-precision, efficient and high temperature control.
A separate circulating water system is established for the chiller, and the application of the water circulating system within the chiller can greatly save water resources. The general method of using cooling water cannot achieve the goal of high-precision and efficient temperature control. Due to the unavoidable harm of natural average temperature to both water and cooling tower heat removal, the temperature is lower in winter and higher in summer.
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