热泵驱动溶液除湿系统流程优化研究

Research on Flow Path Optimization of Liquid Desiccant Dehumidifcation System Driven by Heat Pump

本文研究了由热泵提供冷热源的溶液除湿系统,根据冷却/加热模式和溶液循环类型,可形成30种流程。通过对各流程模拟与分析,在满足送风状态条件下,系统所需冷量主要取决于冷热抵消导致的溶液换热损失,所需热量由换热损失和再生空气焓差决定,并进一步比较了换热损失和焓差的影响程度。系统冷/热源温度主要由冷却/加热模式决定。综合各运行参数,I-1和I-3流程能效较高,I-1和I-3流程优劣关系由冷凝热排热温度决定。

This paper researches the liquid desiccant(LD) dehumidification system with the heat pump to provide cooling and heating sources. 30 different flow paths can be divided according to the cooling/heating mode and solution circulation type. Carrying out simulation and analysis of each flow path, the required cold capacity of LD systems mainly depends on the heat exchange loss caused by the offset of cold and heat when meeting the supply air condition. Heat is related to heat exchange loss and regenerated air enthalpy difference, and the influence level of them is further compared. The cooling/heating source temperature of LD systems are mainly determined by the cooling/heating mode. Considering various operating parameters comprehensively, I-1 and I-3 systems exist the highest energy efficiency among 30 flow paths, and the merits of the two are determined by the condensation heat exhaust temperature.