Adsorption desalination (AD) system has been considered to be an environmentally-friendly and yet low-cost desalination technology that can produce two useful effects, i.e., high-grade fresh water and chilled water for cooling, using a low-temperature waste heat. In the AD process, it has been observed that a higher water evaporation rate in the evaporator results in a higher vapor pressure, which leads to an enhanced water uptake on the adsorbent, hence a better performance of AD system. Therefore, this study investigates the effect of evaporation rate on the performance of AD system by applying two types of liquid distributors (i.e., perforated plate and spray nozzle) to the falling film evaporator. The performance is evaluated over a wide range of operating conditions (heat source, chilled water, and cooling water temperatures) and assessed in terms of specific daily water production (SDWP) and specific cooling capacity (SCC).