Membrane-based liquid desiccant air conditioning (MLAC) system is one of the energy-efficient alternatives to the conventional vapor compression based air conditioning systems. However, due to inherent resistance for heat and mass transfer in the membrane and heat of absorption generated during the mass transfer, the desired room temperature and specific humidity are not achieved in the MLAC system. Present study proposes a novel MLAC system with an additional air cooling heat exchanger for the efficient control of both temperature and specific humidity of the supply air. The influences of different liquid desiccants, ambient conditions, and design and operating parameters are studied. The performance of MLAC system is presented in terms of room temperature and specific humidity, latent effectiveness of dehumidifier and regenerator, coefficient of performance and exergy efficiency. The results of the present study prove that the proposed MLAC system is capable of achieving better indoor conditions than the conventional MLAC system. The effects of the mass flow rate of desiccant and the effectiveness of the desiccant to desiccant heat exchanger on the performance of the proposed MLAC system are found to be significant.

基于膜的液体干燥剂空调（MLAC）系统是传统基于蒸气压缩的空调系统的节能替代方案之一。但是，由于膜中的传热和传质的固有阻力以及传质过程中产生的吸收热，在MLAC系统中无法达到所需的室温和比湿。本研究提出了一种新型的MLAC系统，该系统带有一个附加的空气冷却热交换器，可以有效地控制送风的温度和比湿。研究了不同液体干燥剂，环境条件以及设计和运行参数的影响。MLAC系统的性能以室温和比湿度，除湿机和再生器的潜在效能，性能系数和火用效率。本研究的结果证明，所提出的MLAC系统比常规MLAC系统能够获得更好的室内条件。发现干燥剂的质量流量和干燥剂至干燥剂热交换器的有效性对所提出的MLAC系统的性能具有显着影响。