What role does a concentrator play in the lithium bromide absorption system?

A concentrator in a lithium bromide absorption system is primarily responsible for generating a stronger absorbent solution. The lithium bromide solution is initially diluted as it absorbs refrigerant vapor. Over time, the concentration of lithium bromide decreases due to the absorption of water vapor. The role of the concentrator is to heat this diluted solution and remove some of the water, thereby increasing the concentration of lithium bromide in the solution again.

This process is essential for the efficiency of the absorption cycle, as a stronger absorbent solution enhances the ability of the system to absorb refrigerant vapor and ultimately improve the overall cooling capacity. By recycling and concentrating the absorbent solution, the system maintains high performance and efficiency in its operation.