Study On Different Type Of Fillers Liquid Dehumidifier/Regenerator And Their Comparison About Heat And Mass Transfer Performance

Liquid desiccant air conditioning systems have shown promising potential and application in refrigeration by environmentally friendly, utilization of low-grade thermal energy and improve indoor air quality. The dehumidifier and the regenerator are the core components of liquid desiccant air conditioning system. Its heat and mass transfer law has a very important influence on its performance, so the design of the new, efficient and practical dehumidifier/regenerator and scientific evaluation of the dehumidifier/regenerator’s heat and mass transfer process is the basis for the design and application of liquid desiccant air conditioning. This thesis changes the way of placement of zigzag filler and conducts experiments to explore the z-type dehumidification/regeneration performance in two cases. After that, the thesis selects plant fiber filler, zigzag filler and corrugated structured packing as dehumidifier/ regenerator heat and mass transfer components and conducts experiments to explore the dehumidification/regeneration performance. It also makes comparative analysis on the dehumidification/regeneration performance among the three types of fillers. The detailed results are shown as follows:Although the existing corrugated structured packing has been industrial production, its price is more expensive. Therefore, the plant fiber filler with a simple structure and high cost performance is made, and a cross-flow liquid desiccant dehumidification/regeneration platform based on the filler is constructed, which the lithium chloride aqueous solution is used as the dehumidification/regeneration solution.Based on the cross-flow liquid desiccant dehumidification/regeneration platform, the exploration of the dehumidification/regeneration performance in two cases is constructed. Due to the analysis of process evaluation (import and export of air moisture content difference and dehumidification/regeneration capacity) and the device evaluation (dehumidification efficiency, renewable thermal efficiency and heat and mass transfer coefficients) on the z- type filler, it concludes that the new way of placement can improve its heat and mass transfer performance. In addition, the plant fiber filler is compared with the industrial production of the existing corrugated structured packing (Monte filler) and z-type filler to verify the feasibility of the plant fiber filler and z-type filler used as alternatives for corrugated packing.