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An experimental study of a novel integrated desiccant air conditioning system for building applications

机译:新型建筑用集成式干燥剂空调系统的实验研究

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摘要

To date, the application of liquid desiccant air conditioning systems in built environment applications, particularly small scale, has been limited. This is primarily due to large system size and complexity, issues of desiccant solution leakage and carry-over and equipment corrosion. As a result, a novel integrated desiccant air conditioning system (IDCS) has been developed. The system combines the regenerator, dehumidifier and evaporative inter-cooler into a single membrane based heat and mass exchanger. This paper presents an evaluation, based on experimental data, of the novel IDCS operating with a potassium formate (CHKO2) desiccant working fluid. A range of tests have been completed to characterise the performance of the dehumidifier, regenerator and complete IDCS. Cooling output in the range of 570 to 1362W and dehumidifier effectiveness in the range of 30 to 47% are presented. An issue encountered has been an imbalance between moisture removal rate in the dehumidifier and moisture addition rate in the regenerator. As a result, an adjusted thermal COP (COPth,adj) value has been calculated. COPth,adj values of 1.26 have been achieved with an average of 0.72. Electrical COP (COPel) values of 3.67 have been achieved with an average of 2.5.ududThe work demonstrates that the novel IDCS concept is viable and has provided progressto the field of liquid desiccant air conditioning technology for building applications. Further work is required in order to address the main issue of mass imbalance between the dehumidifier and regenerator.
机译:迄今为止,液体干燥剂空调系统在建筑环境应用中的应用,特别是小规模应用,已经受到限制。这主要是由于大型系统规模和复杂性,干燥剂溶液泄漏,残留物和设备腐蚀的问题。结果,已经开发了新颖的集成式干燥剂空调系统(IDCS)。该系统将再生器,除湿机和蒸发式中冷器组合成一个基于膜的热质交换器。本文基于实验数据,对使用甲酸钾(CHKO2)干燥剂工作液的新型IDCS进行了评估。已经完成了一系列测试,以表征除湿机,再生器和完整的IDCS的性能。展示了570至1362W的冷却输出和30%至47%的除湿效率。遇到的问题是除湿机中的水分去除速率与再生器中的水分添加速率之间的不平衡。结果,已经计算出调节后的热COP(COPth,adj)值。 COPth,adj值为1.26,平均为0.72。电气COP(COPel)的平均值为2.5,达到了3.67。 ud ud该工作表明,新颖的IDCS概念是可行的,并为建筑应用中的液体干燥空调技术领域提供了进步。为了解决除湿器和再生器之间的质量不平衡这一主要问题,需要做进一步的工作。

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