In absorption systems, lithium-bromide solution primarily functions as which component?

In absorption systems, lithium-bromide solution primarily functions as which component?

• A. Salt solution
• B. Absorbent
• C. A solution that creates a pressure difference
• D. All of the above

Answer: (D)

In absorption refrigeration, the lithium bromide solution acts as the absorbent. It’s a salt dissolved in water, forming a LiBr–water solution that has a strong affinity for water vapor. Water vapor from the evaporator is absorbed by this solution, which lowers the vapor pressure in the evaporator and allows the refrigerant (water) to boil at a lower temperature when heat is added to desorb it later. Because the solution binds the refrigerant and helps sustain the low-pressure side of the cycle, it also helps maintain the pressure difference between the evaporator and absorber/condenser that drives the system. So the lithium bromide solution is properly viewed as a salt solution that functions as the absorbent and, through its absorption action, supports the pressure differential essential for operation. That’s why all of the listed roles apply.

In absorption refrigeration, the lithium bromide solution acts as the absorbent. It’s a salt dissolved in water, forming a LiBr–water solution that has a strong affinity for water vapor. Water vapor from the evaporator is absorbed by this solution, which lowers the vapor pressure in the evaporator and allows the refrigerant (water) to boil at a lower temperature when heat is added to desorb it later. Because the solution binds the refrigerant and helps sustain the low-pressure side of the cycle, it also helps maintain the pressure difference between the evaporator and absorber/condenser that drives the system. So the lithium bromide solution is properly viewed as a salt solution that functions as the absorbent and, through its absorption action, supports the pressure differential essential for operation. That’s why all of the listed roles apply.