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Research Papers

Experimental Study on a Hybrid Desiccant Dehumidification and Air Conditioning System

[+] Author and Article Information
Li Yong, Y. J. Dai, J. H. Zhong

Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China

K. Sumathy

Department of Mechanical Engineering, University of Hong Kong, Hong Kong

R. Z. Wang1

Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China

1

Corresponding author; e-mail: rzwang@sjtu.edu.cn

J. Sol. Energy Eng 128(1), 77-82 (Mar 28, 2005) (6 pages) doi:10.1115/1.2148977 History: Received December 24, 2004; Revised March 28, 2005

This paper presents the experimental tests on hybrid desiccant dehumidification and air conditioning systems. Experimental tests are carried out with LiCl desiccant at typical operative ranges for air conditioning applications, particularly for high humid regions like Hong Kong. Results are reported in terms of coefficient of performance (COP) based on primary energy usage and electrical energy usage, respectively. Experiments have demonstrated consistent reduction in humidity ratio satisfying the sensible as well as latent load through a respective subsystem and thereby resulting in a higher COP based on primary energy usage. Also, results show that the regeneration temperature as well as process air flow rate have a significant role on the system performance. It is found that the hybrid system can achieve a higher part load performance, and hence can assure of its effective operation all year around in hot humid regions.

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Copyright © 2006 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Schematic of the hybrid system

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Figure 2

Photographic view of the experimental setup

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Figure 3

Psychrometric chart representation for a typical operation as specified in Table 6

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Figure 4

Effect of process air flow rate on the hybrid system’s performance

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Figure 5

Regeneration temperature versus system performance

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Figure 6

Dependence of the hybrid system performance on humidity ratio: (a) COPp; (b) COPe

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Figure 7

Effect of ambient temperature on the system performance: (a) COPp; (b) COPe

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