环境中低品位热能资源丰富，但较难利用，高效回收利用低品位热源，对于节能环保意义重大。以湿空气为研究对象，提出了一种空气的全热吸收装置，建立了空气与盐溶液换热的理论模型，通过二分法去分析换热过程，进一步研究了湿空气与盐溶液在直接接触式换热装置中传热传质的工作特性，分析了空气温度、空气相对湿度、盐水温度、盐水质量流量对热质交换性能的影响，以及空气和盐水参数对于换热路径中的凝结水量和换热量的影响。研究结果表明，空气的温度和相对湿度的增加会加强热质交换过程；盐水的温度的升高会削弱热质交换程度，而盐水质量流量的增加可以增强传质传热。热质交换能力越强，越能够将凝结过程开始的节点提前，整个过程换热量也越多。

Low grade thermal energy resources are abundant in the environment, but they are difficult to utilize. Efficient recycling and utilization of low-grade heat sources is of great significance for energy conservation and environmental protection. A total heat absorption device for humid air was proposed as the research object, and a theoretical model for heat exchange between air and salt solution was established. The heat transfer process was analyzed using the binary method, and the working characteristics of heat and mass transfer between humid air and salt solution in a direct contact heat exchange device were further studied. The effects of air temperature, relative humidity of air, temperature of salt water, and mass flow rate of salt water on heat and mass exchange performance were analyzed, as well as the effects of air and salt water parameters on condensation water volume and heat transfer in the heat transfer path. The research results indicate that an increase in air temperature and relative humidity will enhance the heat and mass exchange process; The increase in temperature of saltwater will weaken the degree of heat and mass exchange, while the increase in mass flow rate of saltwater can enhance mass and heat transfer. The stronger the heat and mass exchange capacity, the earlier the node at which the condensation process begins, and the more heat is exchanged throughout the entire process.

北京市教育委员会科学研究计划