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Low temperature humidification dehumidification desalination process

机译：低温加湿除湿脱盐工艺

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摘要

The humidification dehumidification desalination process is viewed as a promising technique for small capacity production plants. The process has several attractive features, which include operation at low temperature, ability to utilize sustainable energy sources, i.e. solar and geothermal, and requirements of low technology level. This paper evaluates the characteristics of the humidification dehumidification desalination process as a function of operating conditions. A small capacity experimental system is used to evaluate the process characteristics as a function of the flow rate of the water and air streams, the temperature of the water stream and the temperature of the cooling water stream. The experimental system includes a packed humidification column, a double pipe glass condenser, a constant temperature water circulation tank and a chiller for cooling water. The water production is found to depend strongly on the hot water temperature. Also, the water production is found to increase upon the increase of the air flow rate and the decrease of the cooling water temperature. The measured air and water temperatures, air relative humidity and the flow rates are used to calculate the air side mass transfer coefficient and the overall heat transfer coefficient. Measured data are found to be consistent with previous literature results.
机译：加湿除湿脱盐工艺被认为是小规模生产工厂的一项有前途的技术。该方法具有几个吸引人的特征，包括在低温下操作，利用可持续能源即太阳能和地热的能力以及对低技术水平的要求。本文根据加湿条件对加湿除湿脱盐过程的特性进行了评估。使用小容量实验系统来评估过程特性，该过程特性是水和空气流的流速，水流温度和冷却水流温度的函数。实验系统包括填充加湿塔，双管玻璃冷凝器，恒温水循环罐和冷却水冷却器。发现水的产生强烈地依赖于热水温度。而且，发现随着空气流量的增加和冷却水温度的降低，水的产量增加。测得的空气和水的温度，空气相对湿度和流速用于计算空气侧传质系数和总传热系数。发现测得的数据与先前的文献结果一致。

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