LiBr absorption chiller mainly uses waste heat to refrigerant. During the long run of the chillers, it will encounter the problem that the cooling capacity cannot meet the requirements. Hope Deepblue as a LiBr absorption chiller and LiBr absorption heat pump product experts, has a very rich experience in design, commissioning, maintenance and other experience in this field. And the LiBr absorption chiller cooling capacity decline are summarized in the following aspects:

1. The Vacuum Degree 

Vacuum degree is the life of LiBr absorption chiller and LiBr absorption heat pump. When the vacuum degree declined, that will cause the the temperature of evaporation water to rise and the cooling capacity reduced or even no refrigerant. The main reasons affecting the vacuum degree of LiBr absorption unit are the air tightness of the unit and the corrosion of the solution to the unit.

2. Surfactant

The surfactant in LiBr absorption unit is generally isooctanol. Adding 0.1~0.3% of isooctanol to the LiBr  solution can reduce the surface tension of the LiBr solution, enhance the LiBr solution and the water vapor combination, and improve the cooling capacity of unit. Therefore, a decrease in the content of isooctanol in the LiBr solution will also affect the cooling capacity of the unit.

3. Circulating Cooling Water

The effect of heat exchange between the circulating cooling water and the LiBr absorption unit on the cooling capacity of the unit is mainly due to the fouling of the circulating water system that leads to scaling or clogging of the copper tubes, resulting in excessively high temperatures in the absorber and condenser, and poor heat exchange, and a decrease in the cooling capacity of the unit.

4. Refrigerant Water

Refrigerant water contamination greatly reduces the partial pressure of refrigerant water vapor in the evaporator, thus affecting the cooling power of the unit.

5. Corrosion

Corrosion and perforation of the heat exchanger tubes of the unit have caused string leakage of dilute and concentrated solution, and rupture of the copper tubes of the high and low pressure generators, resulting in unit shutdown and refrigerant water pollution. The increase in the blockage rate of the holes in the refrigerant water secondary spray nozzle and absorber concentrated solution distribution plate affects the absorption effect, and is also one of the reasons for the reduction of the cooling capacity of the LiBr absorption unit.