Performances of the Hybrid Active Desiccant Wheel System with Type III Desiccant

Abstract:

A new type of hybrid desiccant air conditioning system combining an active desiccant wheel with a conventional front-positioned cooling coil is presented, in which Type Ⅲ desiccant is used in the active desiccant wheel. Then a preliminary experiment is carried out in order to investigate the feasibility of the hybrid desiccant system serving as a dedicated outdoor air system (DOAS). The result shows: under the two typical outdoor air conditions in the area of South China, the desiccant system which only needs to adopt a regeneration temperature of 45°C without lowering the cooling coil temperature can satisfy the requirements of the dehumidification; when operating in the climate with a high humidity of 90% and a high-temperature of no more than 36.5°C, the desiccant system only driven at a regeneration temperature of 60°C can also provide enough dehumidifying capacity; but compared with the active desiccant wheel using Type Ⅰor Type Ⅱ desiccant, this system can not reach a lower dew point. Therefore, this system can operate effectively at a moderate regeneration temperature, suitable for the high quality and comfortable air conditioning.

• Periodical: Applied Mechanics and Materials (Volumes 34-35)
• Pages: 167-171
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.34-35.167
• Online since: October 2010
• Authors: Yuan Zhi Zuo, Sheng Li Wen, Xi Ya Li
• Keywords: Active Desiccant Wheel, Dedicated Outdoor Air System, Desiccant, Hybrid Air Conditioning System, Moisture Load

References

[1] J. Miriel, L. Serres and A. Trombe: Appl. Ther. Eng., Vol. 22 (2002), P. 1861.

[2] E. N. Fatemeh, V. P. Dolf and H. S. Mohamad: Ener. & Buildings, Vol. 38 (2006), P. 1230.

[3] N. Subramanyam, M. P. Maiya and S. S. Murthy: Appl. Ther. Eng., Vol. 24 (2004), P. 2777.

[4] J. R. Sand and J. C. Fischer: Appl. Ther. Eng., Vol. 25 (2005), P. 3138.

[5] Y. F. Ding, J. Ding and X. X. Yang: Fluid Machinery (in Chinese), Vol. 34 (2006), P. 63.

[6] R. X. Zhuo, Y. Su and Y. M. Wang: Refrigeration (in Chinese), Vol. 25 (2006), P. 48. 28 30 32 34 36 38 40.

[5] 5.

[6] 0.

[6] 5.

[7] 0.

[7] 5.

[8] 0.

[8] 5 Humidity ratio Temperature Temperature of the inlet air /℃ Humidity ratio of the outlet air /(g/kg) 17 18 19 20 21 22 23 24 25 26 Temperature of the outlet air /℃.

[7] 2g/kg Fig. 6 Temperature and humidity ratio of the outlet air from the active desiccant wheel under the different inlet air temperature Fig. 5 Temperature of the outlet air from the active desiccant wheel under the different regenerative temperature 40 45 50 55 60 65 70.

DOI: 10.1016/j.renene.2019.08.082

[18] 0.

[18] 5.

[19] 0.

[19] 5.

[20] 0.

[20] 5.

[21] 0.

[21] 5 Operating condition 2 Temperature of the outlet air /℃ Regenerative temperature /℃ Operating condition 1.