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Analytical modeling of a desiccant wheel
Affiliation:1. Energy Mechanics Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Republic of Korea;2. Department of Mechanical Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju-si, Chungbuk 380-702, Republic of Korea;1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China;2. Engineering Research Centre of Solar Power and Refrigeration, MOE, China;3. Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China;1. Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, No.2 Nengyuan Rd. Wushan, Tianhe District, Guangzhou 510640, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. Nagoya University, Furo-cho, Chikusa-ku, Nagoya-shi, Aichi 464-8603, Japan;4. Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan;1. Center for Environmental Energy Engineering, University of Maryland, 4164 Glenn L. Martin Hall Bldg., College Park, MD 20742, USA;2. Advanced Ship Engineering Research Center (ASERC), Dept. of Naval Architecture & Ocean Engineering, Pusan National University, 30 Changjeon-dong, Kumjeng-ku, Busan 609-735, Republic of Korea;1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;2. Key Laboratory of Wind Energy Utilization, Chinese Academy of Sciences, Beijing 100190, China;3. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, China;4. Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore;5. Engineering Research Centre of Solar Energy and Refrigeration, MOE China, China;6. NUS Environmental Research Institute, National University of Singapore, Singapore 138602, Singapore
Abstract:A simple integral model is presented for a desiccant wheel. The original governing equations for a desiccant wheel were simplified to a set of linear ordinary differential equations and an analytical solution was obtained. A brief analysis is given about the solution regarding the non-dimensional numbers that decide the behavior of a desiccant wheel. From the solution, algebraic expressions were obtained for time-averaged heat and mass transfer rates and the results were compared with a numerical model and a set of experimental data in the literature. In comparison with the numerical model, relative error was found less than 12% at 120 °C regeneration temperature and 10% standard deviation was observed with the experimental data. The analytical model is considered capable of describing a symmetric desiccant wheel realistically.
Keywords:Analytical model  Desiccant wheel  Adsorption  Dehumidification  Regeneration  Rotary  Modèle analytique  Roue déshydratante  Adsorption  Déshumidification  Régénération  Rotatif
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