工程热力学

Solid Desiccant Heat Pump Fresh Air Unit using Composite Silica Gel

  • YANG Tianyu ,
  • GUO Defang ,
  • GE Tianshu
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  • 1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Key Laboratory of Power Mechanical Engineering, MOE China, Shanghai 200240, China
    2. Qingdao Haier A/C Electronic Co., Ltd, Qingdao 266101, China

网络出版日期: 2024-07-15

基金资助

The authors acknowledge the financial support from the National Natural Science Foundation of China (No. 51922070). This work was supported by “the Fundamental Research Funds for the Central Universities”.

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

Solid Desiccant Heat Pump Fresh Air Unit using Composite Silica Gel

  • YANG Tianyu ,
  • GUO Defang ,
  • GE Tianshu
Expand
  • 1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Key Laboratory of Power Mechanical Engineering, MOE China, Shanghai 200240, China
    2. Qingdao Haier A/C Electronic Co., Ltd, Qingdao 266101, China

Online published: 2024-07-15

Supported by

The authors acknowledge the financial support from the National Natural Science Foundation of China (No. 51922070). This work was supported by “the Fundamental Research Funds for the Central Universities”.

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

摘要

新风负荷在建筑热负荷中占有很高的比例。为了高效处理新风负荷,研究人员设计出了一种基于固体除湿的热泵新风机组。为了进一步提高该新风机组的性能,本文研究了复合硅胶在基于固体除湿的热泵新风机组中的应用。首先对固体除湿的核心部件干燥剂涂层进行了研究,实验表明,复合硅胶涂层(CSGC)的吸附速率和平衡吸水量均是硅胶涂层(SGC)的2倍以上。此后,建立了固体除湿热泵新风实验台,分别对基于SGC和CSGC的热泵新风机性能进行了测试。结果表明,在夏季工况下,与基于硅胶涂层的固体除湿热泵新风机组(SGFU)相比,基于复合硅胶的固体除湿热泵新风机组(CSGFU)的平均除湿量和COP分别提高了15%和30%。在冬季工况下,与SGFU相比,CSGFU的平加湿量和COP分别增加了42%和17%。在切换周期为3分钟,压缩机频率为40rps的最佳运行参数下,CSGFU在夏季工况下的COP可达7.6。在不同夏季工况下的实验结果表明,在较高的室外含湿量和温度下,CSGFU和SGFU具有较高的COP和除湿率。 

本文引用格式

YANG Tianyu , GUO Defang , GE Tianshu . Solid Desiccant Heat Pump Fresh Air Unit using Composite Silica Gel[J]. 热科学学报, 2024 , 33(4) : 1286 -1300 . DOI: 10.1007/s11630-024-1964-6

Abstract

The introduction of fresh air into the indoor space leads to a significant increase in cooling or heating loads. Solid desiccant heat pump fresh air unit which can handle the latent and sensible load of fresh air efficiently have been proposed recently. To improve the performance of the solid desiccant heat pump fresh air unit in the fresh air handling process, in this paper, the application of composite silica gel in a heat pump fresh air unit was investigated. The comparison between silica gel coating (SGC) and composite silica gel coating (CSGC) shows that the adsorption rate and water uptake capacity of CSGC are more than two times higher than those of SGC. An experimental setup for the solid desiccant heat pump fresh air unit was established. The performance of SGC and CSGC was tested in the setup successively. Results show that under summer conditions, compared with the solid desiccant heat pump fresh air unit using silica gel (SGFU), the average moisture removal and COP of the one using composite silica gel (CSGFU) increased by 15% and 30%, respectively. Under winter conditions, compared with SGFU, the average humidification and COP of CSGFU increased by 42% and 17%. With optimal operation conditions of 3 min switchover time and 40 r/s compressor frequency, the COP of CSGFU under summer conditions can reach 7.6. Results also show that the CSGFU and SGFU have higher COP and dehumidification rate under higher outdoor temperature and humidity ratio.

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