22 September 2011

THEORETICAL ANALYSIS AND SIMULATION OF HYBRID SOLID AND LIQUID DEHUMIDIFIER SYSTEM


A waste heat driven hybrid solid dehumidifier and liquid dehumidifier system is proposed. This new type of dehumidification system can be efficiently driven by low temperature heat source such as solar energy and achieve high dehumidification
performance, due to its unique serial dehumidification and regeneration process. The humid process airflow is first dehumidified by liquid dehumidifier and then by solid one, at the same
time, regeneration air first regenerates solid dehumidifier and then the liquid one. This is because the liquid dehumidifier is more efficient to dehumidify high RH air with relative low
temperature regeneration heat, while the solid dehumidifier can dehumidify lower RH air with higher temperature regeneration heat. Theoretical analysis and performance simulation of the hybrid dehumidifier system is carried out with varied process air conditions and regeneration temperatures. The results show that this new hybrid dehumidifier system is promising for dehumidification performance improvement and high grade energy saving. It can be efficiently driven by waste heat as low as 70? with a satisfactory dehumidification
performance. The ratio of dehumidification between liquid and solid dehumidifier should vary
according to regeneration temperature and process air conditions.