Experimental investigation of precooling desiccant-wheel air-conditioning system in a high-temperature and high-humidity environment

2018 ◽  
Vol 95 ◽  
pp. 83-92 ◽  
Author(s):  
L. Chen ◽  
S.H. Chen ◽  
L. Liu ◽  
B. Zhang
Keyword(s):  
Experimental Investigation ◽  
High Temperature ◽  
Air Conditioning ◽  
High Humidity ◽  
Air Conditioning System ◽  
Desiccant Wheel ◽  
High Humidity Environment ◽  
Humidity Environment

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

2010 ◽  
Vol 34-35 ◽  
pp. 167-171
Author(s):  
Yuan Zhi Zuo ◽  
Sheng Li Wen ◽  
Xi Ya Li
Keyword(s):  
Air Conditioning ◽  
Dew Point ◽  
High Humidity ◽  
Outdoor Air ◽  
High Quality ◽  
Air Conditioning System ◽  
Desiccant Wheel ◽  
Coil Temperature ◽  
New Type ◽  
Cooling Coil

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.

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