The operation of the industrial chiller system works through three interconnected systems: refrigerant circulation system, water circulation system, and electrical automatic control system. Used in the cooling of plastic processing machinery forming molds, it can greatly improve the surface finish of plastic products, reduce the surface traces and internal stress of plastic products, make the products do not shrink or deform, facilitate the demolding of plastic products, accelerate product shaping, and greatly improve Production efficiency of plastic molding machine.
Industrial chillers often have the following misoperations in daily operation:
1. The operators of some air-conditioning host rooms did not strictly adjust the pressure drop of chilled water inlet and outlet according to the operating parameters of the unit when starting up. It is often adjusted higher than the operating parameters, when the pressure drop is too high. It is not to close the outlet valve of the cold water pump. Instead, open the water inlet and outlet valves of the evaporator of another non-operating unit. Let the excess water away from the evaporator of another unit. In order to reduce the pressure drop, the operating current of the cold water pump is artificially increased, resulting in a waste of electricity.
2. When starting up. The water inlet and outlet valves on the evaporator of the non-starting unit are not closed first, causing part of the cold water to flow away from the evaporator of the unit that cannot be opened, which affects the cooling effect of the unit under working conditions.
At this time, the flow rate that meets the 49kPa pressure drop of chilled water in and out of the A machine evaporator is 100kg/s. Since both the A and B evaporators have water flowing through, theoretically the chilled water flowing through the A machine evaporator is only 50kg/s, and the other 50kg /S flows away from the B unit evaporator. This kind of misoperation artificially reduces the cooling capacity of the unit, making it difficult to meet the requirements of various cold applications. At the same time, because the amount of water flowing through the evaporator of the A machine is reduced, the temperature of the A machine's outlet water will naturally be lower, which often gives the operator the illusion that the cooling effect of the unit is good. The pressure drop of the inlet and outlet water of the A machine evaporator will definitely decrease. Some operators do not close the water inlet valve of the evaporator of the B machine, and increase the pressure drop of the inlet and outlet water of the evaporator of the A machine. It’s a mistake to add a wrong one. After adding a cold water pump to solve the problem, although the pressure of the water inlet and outlet of the evaporator of the A machine is increased, it is not necessary to increase the cold water pump. This is equivalent to two cold water pumps. The work of the two evaporators is pure waste.
The reason for the above misoperation is that the operator does not understand the operating principle of the unit, and is only satisfied with being able to turn on the main engine; the operator is afraid of trouble and is unwilling to adjust the water valve. This is done for convenience.
The correct operation method is: 1. Before starting the machine, close the chilled water inlet valve of the unit that is not in operation to prevent water channeling; 2. Open the inlet and outlet valves on the evaporator of the unit to be operated, and turn on the corresponding chilled water pump to turn the evaporator off. The pressure drop of the inlet and outlet water is adjusted to about 49kPa. 3. If the water pump is started. It is found that the pointer of the inlet and outlet pressure gauge swings too much, indicating that there is air in the chilled water system and needs to be exhausted. After the pressure gauge indicates normal, the next operation can be continued; 4. No matter how many units are opened in the operation, it is one chilled water pump to one. Units.
Nanjing RICOM Refrigeration Equipment Co., Ltd. is a manufacturer
specializing in industrial temperature control technology for 20 years. It
implements modern quality management system S09001: 2008 and environmental
system IS014001: 2004 standards to ensure that the enterprise team continues to
be in the technical field Innovation, focus on customer use and satisfaction,
unanimously recognized by the industry and customers.