Abstract
Currently two humidity control methods, namely liquid desiccant and rotary wheel dehumidification, are commonly used to handle humid fresh air. For these two methods, a large amount of heat would be consumed in the processes of solution regeneration and adsorbent regeneration, which results in a serious waste of energy. This paper deals with a new type low-temperature airflow system, which was combined with an ice-storage device. Based on exergy balance model, its performance parameters, such as the cooling load, energy consumption and exergy efficiency, were calculated and compared with those of a rotary wheel dehumidification system and a liquid desiccant system under the same conditions according to experimental data of a practical project in Guangzhou. The calculation results show that the exergy efficiency of new type low-temperature airflow system is higher than that of the rotary wheel dehumidification system by 96.14% and higher than the liquid desiccant system by 40.31%, which conditionally means the proposed low-temperature airflow dehumidification system has much better performances.
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