Laboratory rodent room usually adopts full fresh air system with large ventilation rates and causes energy waste for heat-cold offset process. Liquid desiccant system is identified as an energy saving approach in humidity control field. This paper presents the ammonia absorption performance of a liquid desiccant dehumidification system applied in laboratory rodent room while considering air dehumidification requirements. Prior to the simulation process of the system, Henry’s law constant (H_C) of ammonia, one method to assess the solubility, in LiBr, LiCl, and CaCl₂ solutions are tested at the salt concentration range of 20–50 wt% and at the temperature range of 10–50 °C. The ammonia concentration of supply air (C_sa) in the LiBr condition is apparently smaller than that in LiCl and CaCl₂ conditions of a liquid desiccant dehumidification system. In addition, C_sa apparently increases with the increasing number of mass transfer units of ammonia (NTU_a) and solution flow rate. The simulation results show that most ammonia is introduced by heat recovery process. An improved system structure is proposed to reduce ammonia transfer. Using the proposed heat recovery method, C_sa is decreased by more than 70% over the initial system.

实验室鼠房通常采用全新风系统，通风量大，热冷胶印工艺造成能源浪费。液体干燥剂系统被确定为湿度控制领域的一种节能方法。本文介绍了在考虑空气除湿要求的情况下应用于实验室啮齿动物室的液体干燥剂除湿系统的氨吸收性能。在系统模拟过程之前，氨的亨利定律常数 ( H _C )，一种评估溶解度的方法，在20–50 wt% 的盐浓度范围内测试，在 LiBr、LiCl 和 CaCl ₂溶液中温度范围为 10–50 °C。供气氨浓度（C _sa) 在 LiBr 条件下明显小于在 LiCl 和 CaCl ₂条件下的液体干燥剂除湿系统。此外，C _sa明显随着氨的传质单元数量（NTU _a）和溶液流速的增加而增加。模拟结果表明，大部分氨是通过热回收过程引入的。提出了一种改进的系统结构以减少氨转移。使用建议的热回收方法，C _sa比初始系统降低了 70% 以上。