LAPSE:2018.0842
Published Article
LAPSE:2018.0842
Field Study on Humidification Performance of a Desiccant Air-Conditioning System Combined with a Heat Pump
Koichi Kawamoto, Wanghee Cho, Hitoshi Kohno, Makoto Koganei, Ryozo Ooka, Shinsuke Kato
November 16, 2018
A desiccant air-conditioning system was developed as a latent-load-processing air conditioner in a dedicated outdoor air system during the summer. This study investigated the application of this air-conditioning system to humidification during the winter without using make-up water, thereby eliminating the cause of microbial contamination in air-conditioning systems. The experiments were conducted with a system used for summer applications to determine the feasibility of adsorbing vapor from outdoor air and supplying it to an indoor space. The humidification performance, energy efficiency, and operating conditions were examined. Although the conditions were subpar because the experiments were performed with an actual dedicated outdoor air system, the results showed that it is possible to supply air with a minimum humidity ratio of 5.8 g/kg dry air (DA) when the humidity ratio of outdoor air ranges from 1.8 to 2.3 g/kg DA. The minimum humidification performance required for a dedicated outdoor air system was achieved by increasing the airflow rate of the moisture-adsorption side to 2⁻3 times that of the humidification side. In addition, air leaking from the moisture-adsorption side to the humidification side, improving the mechanical structure, such as by the insulation of the moisture-adsorption side, and an efficient operating method were examined for humidification during the winter.
Keywords
dedicated outdoor air system (DOAS), desiccant, heat pump, humidification
Suggested Citation
Kawamoto K, Cho W, Kohno H, Koganei M, Ooka R, Kato S. Field Study on Humidification Performance of a Desiccant Air-Conditioning System Combined with a Heat Pump. (2018). LAPSE:2018.0842
Author Affiliations
Kawamoto K: Kawamoto Engineering, 3-1-11 Kami-Ikebukuro, Toshimaku, Tokyo 170-0012, Japan
Cho W: Department of Architecture, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan [ORCID]
Kohno H: Research and Development Center, Asahi Kogyosha Co., Ltd., 6-17-16 Higashi-Narashino, Narashino, Chiba 275-0001, Japan
Koganei M: Department of Architectural Design and Engineering, Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
Ooka R: Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
Kato S: Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
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Journal Name
Energies
Volume
9
Issue
2
Article Number
E89
Year
2016
Publication Date
2016-01-30
Published Version
ISSN
1996-1073
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Original Submission
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PII: en9020089, Publication Type: Journal Article
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LAPSE:2018.0842
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doi:10.3390/en9020089
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Nov 16, 2018
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Nov 16, 2018
 
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Calvin Tsay
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