Abstract:

The relative humidity of air is generally above 80% in the ship cabin. However, the people will feel uncomfortable and the immunity will decrease when the relative humidity of air is higher than 70% in the environment. Effective air dehumidification will improve the air quality in the cabin and ensure the normal navigation of the ship. According to the characteristics of the relative humidity of air in the ship cabin and the waste heat generated by the operation of the equipment, the air can be dehumidified by the rotary desiccant wheel. And the waste heat of the ship can be recovered and used as the regenerative heat source of the rotary desiccant wheel which has the characteristics of large dehumidification, high control precision, economic and environmental protection. So it s promising to apply the rotary desiccant wheel dehumidification air conditioning system to the ship for recovering the waste heat of the ship and improving the air quality of the cabin, in this way low energy consumption and efficient dehumidification can be achieved. Therefore, a regenerative recirculating dehumidification air conditioning system was proposed in the present work. The dehumidification characteristics of the system under different working conditions were quantitatively studied, and the effects of different cycle bypass coefficient (45%—85%), process air temperature (28—40℃), the relative humidity of process air (50%—85%) and regeneration air temperature (130—160℃) on the dehumidification performance of the system were obtained. The experiment results showed that the rotary desiccant wheel dehumidification air conditioning system proposed could efficiently improve the dehumidification ratio compared the conventional sea water direct cooling. Under the same cycle bypass coefficient, the dehumidification ratio increased with the increase of process air temperature, relative humidity of process air and regeneration air temperature. There existed optimal dehumidification ratios of the system, and the corresponding optimal cycle bypass coefficient was 50%—75%. It decreased with the increase of the process air temperature and the relative humidity, and increased with the increase of the regeneration air temperature.

Key words: adsorption, desiccant wheel dehumidification, regeneration, recovery, bypass, dehumidification ratio

摘要：

转轮除湿空调系统可回收船舶余热将其作为转轮再生热源并改善舱室内空气品质，有望实现低能耗高效除湿。为此，建立了一种新型循环转轮除湿空调系统，定量研究了变工况条件下系统的除湿特性，获得了不同循环分流系数（45%～85%）、处理空气温度（28～40℃）、处理空气相对湿度（50%～85%）、再生空气温度（130～160℃）对系统除湿效果的影响。结果表明：所提出的转轮除湿空调系统相比常规海水直接冷凝除湿方式可有效提高除湿率；在相同循环分流系数下，系统的除湿率随着处理空气温湿度以及再生空气温度的升高而逐渐增大；系统的除湿率存在最优值，其对应的最佳循环分流系数为50%～75%，该系数随着处理空气温湿度的增大而减小，随着再生空气温度的升高而增大。

关键词: 吸附, 转轮除湿, 再生, 回收, 分流, 除湿率