The method of cleaning and nursing the condenser of the chiller
The condenser is one of the main components of the chiller. In the cooling process, the condenser plays a role in outputting the heat absorbed in the evaporator and the heat converted by the compressor work, and transfers the heat to the cooling medium to take away and make the refrigerant Condensation is a heat exchange device. If its performance decreases, it will directly affect the cooling capacity of the chiller.
Commonly used condensers in industrial water chillers include air-cooled condensers, water-cooled condensers, and evaporative condensers. Among them, water-cooled condensers include horizontal shell and tube, sleeve and welded plate types. Here We mainly introduce the cleaning of two commonly used chiller condensers, the copper tube fin air-cooled condenser and the shell-and-tube water-cooled condenser.
Condenser cleaning time and cycle
Usually the chiller system will have an alarm device. The condenser will have poor heat dissipation due to dirt and blockage, and the condensing pressure will increase. When the high pressure limit is exceeded, the system will trigger an alarm.
Cleaning of air-cooled finned condenser
The air-cooled condenser uses air as the cooling medium. Due to the dust in the air, some dust will stick to the surface of the condenser fins. A long time will make the heat dissipation effect of the condenser worse, especially in a harsh environment. Place, so it should be cleaned regularly. Simple dust can be blown clean with compressor air, etc. If there is a lot of dirt, a non-corrosive cleaning agent should be used to clean the heat pipe and fins to achieve the purpose of enhancing the heat dissipation effect.
Cleaning of water-cooled shell and tube condenser
The cooling water of the water-cooled condenser usually adopts an open circulation loop. When the content of calcium salt and magnesium salt in the water is large, it is easy to deposit on the surface of the cooling water pipe to form scale, which affects heat transfer. Excessive scaling will also reduce the flow cross-section of the cooling water, reduce the water volume, and cause the condensation pressure to rise. Therefore, it is necessary to clean the scale regularly according to the water quality. The poor water quality (such as groundwater, lake water, etc.) is cleaned at least once a year; the water quality is good, It can be cleaned once every 2 to 3 years.
Manual cleaning
Use a flat shovel and a small hammer along the outer surface of the pipe to clean up the scale on the outside of the pipe. This method is suitable for the shower shock type cold extractor. If the freezer is a shell-and-tube condenser, the scale can be drawn in the pipe with a spider-shaped key wire. The method of manual descaling is simple, but the descaling effect is not good, the efficiency is low and the labor intensity is high.
