LiBr absorption chillers primarily use waste heat for refrigeration, but over time, they may experience a reduction in cooling capacity, which can fail to meet required demands. As experts in LiBr absorption chillers and heat pumps, Hope Deepblue has extensive experience in design, commissioning, and maintenance within this field. Below are the key factors contributing to the decline in cooling capacity of LiBr absorption chillers:

1. Vacuum Degree
   The vacuum degree is critical for the performance of LiBr absorption chillers and heat pumps. A decline in the vacuum level causes the evaporation temperature of the water to rise, reducing the cooling capacity or even causing a loss of refrigerant. The main factors affecting the vacuum degree include the unit's airtightness and the corrosive effect of the LiBr solution on the unit components.
2. Surfactant
   The surfactant typically used in LiBr absorption units is isooctanol. Adding 0.1-0.3% of isooctanol to the LiBr solution reduces the surface tension, improving the interaction between the LiBr solution and water vapor, thus enhancing the unit's cooling capacity. A decrease in the concentration of isooctanol in the solution can therefore negatively affect the chiller's performance.
3. Circulating Cooling Water
   The effectiveness of heat exchange between circulating cooling water and the LiBr absorption unit significantly impacts the unit’s cooling capacity. Fouling in the cooling water system can lead to scaling or clogging of the copper tubes, which results in higher temperatures in the absorber and condenser. This reduces heat transfer efficiency and lowers the cooling capacity of the unit.
4. Refrigerant Water
   Contamination of refrigerant water reduces the partial pressure of refrigerant water vapor in the evaporator, directly affecting the chiller’s cooling power. This contamination can compromise the efficiency of the entire cooling system.
5. Corrosion
   Corrosion and perforation of the heat exchanger tubes in the unit can cause leakage of both dilute and concentrated solutions. This leads to refrigerant water pollution and potential shutdowns. Additionally, the blockage of holes in the refrigerant water secondary spray nozzle and the concentrated solution distribution plate in the absorber can negatively impact the absorption process, further reducing the cooling capacity of the LiBr absorption unit.

Hope Deepblue continuously works to monitor, maintain, and improve these systems, ensuring that cooling performance is optimized and reliable for customers.