Energy storage for desiccant cooling systems component development
Energy storage for desiccant cooling systems component development
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DOI：
10.1016/s0038-092x(98)00081-4
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发表时间：
1998-12-01
期刊：
影响因子：
6.7
通讯作者：
Kapfhammer, C
中科院分区：
文献类型：
--
作者：
Kessling, W;Laevemann, E;Kapfhammer, C
液体干燥剂冷却系统特别适用于太阳能应用。液体干燥剂可在80℃以下的温度再生，浓缩和稀释的干燥剂可轻松储存，为空气除湿和冷却提供高储能能力。需要特殊的吸收过程以实现最佳的空气除湿效果，同时具备高储能能力。详细讨论了对吸收过程的主要影响。对于高效除湿，吸收过程的温度和盐溶液的入口浓度至关重要。为了实现高储能能力，需要较高的空气与溶液质量比，以使盐的入口和出口浓度有较大差异。较高的质量比对应较小的干燥剂流量。已经开发并测试了新型除湿器，以实现高效的空气除湿和高储能能力。它们通过极少量的吸湿盐水溶液（例如，在内部冷却的吸收过程中的氯化锂 - 水）对空气进行除湿。报告了空气除湿和储能能力的实验结果。通过吸收实验确定了数值模型中使用的传质系数，从而能够可靠地确定除湿器的尺寸。（C）1998爱思唯尔科学有限公司。保留所有权利。
Liquid desiccant cooling systems are especially suitable for solar energy applications. The liquid desiccants can be regenerated at temperatures below 80 degrees C and the concentrated and diluted desiccants can easily be stored to provide a high energy storage capacity for air dehumidification and cooling. Special absorption processes are necessary to achieve an optimal air dehumidification and simultaneously a high energy storage capacity. The dominating effects on the absorption process are discussed in detail. For efficient dehumidification the temperature of the absorption process and the inlet concentration of the salt solution are of major importance. For a high energy storage capacity a high air to solution mass ratio is required to achieve great differences between salt inlet and outlet concentrations. A high mass ratio corresponds to a small desiccant flow. New dehumidifiers have been developed and tested, to achieve an efficient air dehumidification and high storage capacity. They dehumidify air by a very small flow of a hygroscopic aqueous salt solution, cg. LiCl-H2O in an internally cooled absorption process. Experimental results of air dehumidification and storage capacities are reported. Mass transfer coefficients, used in numerical models, have been identified by absorption experiments and enable the reliable sizing of dehumidifiers. (C) 1998 Elsevier Science Ltd. All rights reserved.