Detalhes bibliográficos
| Resumo: | The desiccant wheel is a key component in solid-desiccant systems. At present, the analysis of the behaviour of air handling units based on desiccant wheels is a complex task. It is difficult to access a simple model that can represent the behaviour of commercialized desiccant wheels with sufficient accuracy. Experimental data measured in an air handling unit equipped with a desiccant wheel are considered in the present work. The air handling unit belongs to a test facility with a microcogeneration system located at Università degli Studi del Sannio (in Benevento, Southern Italy). Thermal energy from the microcogenerator is used to heat up the regeneration airflow. An attempt of investigating the validity of the simplified effectiveness method in predicting the global behaviour of a desiccant wheel is performed. Two approaches are used with different pair of effectiveness parameters. Only one sensor of temperature and one sensor of relative humidity were used in each measuring section of the air handling unit. This constraint is most crucial at both outlet sections of the desiccant wheel due to the strong dependence of the air state on the angular position. An empirical correction of the measured state of the process air at the outlet of the desiccant wheel is used. The corrected data are used in the investigation of the validity of the effectiveness method by using constant values in a large set of cases where the rotation speed of the desiccant wheels and the fans are kept constant. Important deviations between the predicted and the experimental results were found in a significant number of cases, therefore there is the need of improving the method by taking into account the effect on the effectiveness parameters of varying the inlet states of both airflows. |
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| Autores principais: | Ruivo, Celestino R. |
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| Outros Autores: | Ruivo, Celestino Rodrigues; Ruivo, Celestino R.; ADAI - Association for the Development of Industrial Aerodynamics; ADAI - Association for the Development of Industrial Aerodynamics; Silva, Manuel Carlos Gameiro da; Silva, Manuel Gameiro da; Silva, Manuel Carlos Gameiro da; Silva, M. C. G.; Silva, M. Gameiro da; ADAI - Association for the Development of Industrial Aerodynamics; LAETA - Associated Laboratory for Energy, Transports and Aeronautics; manuel.gameiro@dem.uc.pt; 0000-0003-0739-9811; staff; Full Professor at Department of Mechanical Engineering, Faculty of Sciences and Technology of the University of Coimbra.. Scholar of the MIT-Portugal Program. Invited Professor of the Master Course GBBV Green Buildings, Batiments Verts at ENTPE – University of Lyon, France Coordinator of the Research Group in Energy, Environment and Comfort (EEC) of ADAI-LAETA. LAETA stands for Associated Laboratory of Energy, Transports and Aeronautics. It is a R&D laboratory with more than 200 senior investigators from the Universities of, Lisbon, Porto, Coimbra and Beira Interior and has been evaluated with the classification of Excellent by the Portuguese Science Foundation. The EEC Research Group has about 50 persons, 15 of them being researchers holding a Ph D degree. Vice-President of ADAI, a non-profitable research association connected to the Department of Mechanical Engineering of the University of Coimbra. Has launched in 1994 the Measurement and Testing Laboratory of ADAI, which is accredited by the Portuguese Institute of Accreditation since 1996. He is the Technical Responsible of this Laboratory that is the job place of 9 persons. Vice-President of Rehva. Chair of the Education Committee of Rehva. Performed research on the fields of indoor environmental quality, energy efficiency and sustainability, vehicle testing and aerodynamics,. Principal investigator and coordinator of 30 research projects sponsored by international, national and private organizations.; Coimbra; University of Coimbra - Mechanical Engeenering Department; PT; LAETA - Associated Laboratory for Energy, Transports and Aeronautics; true|||/data/eg/ou-files|||cris/ou/fileservice|||LAETA|||jpg|||image/jpeg|||ou00011/7; LAETA - Associated Laboratory for Energy, Transports and Aeronautics; Silva, Manuel Carlos Gameiro da; Silva, Manuel Gameiro da; Silva, Manuel Carlos Gameiro da; Silva, M. C. G.; Silva, M. Gameiro da; ADAI - Association for the Development of Industrial Aerodynamics; LAETA - Associated Laboratory for Energy, Transports and Aeronautics; manuel.gameiro@dem.uc.pt; 0000-0003-0739-9811; staff; Full Professor at Department of Mechanical Engineering, Faculty of Sciences and Technology of the University of Coimbra.. Scholar of the MIT-Portugal Program. Invited Professor of the Master Course GBBV Green Buildings, Batiments Verts at ENTPE – University of Lyon, France Coordinator of the Research Group in Energy, Environment and Comfort (EEC) of ADAI-LAETA. LAETA stands for Associated Laboratory of Energy, Transports and Aeronautics. It is a R&D laboratory with more than 200 senior investigators from the Universities of, Lisbon, Porto, Coimbra and Beira Interior and has been evaluated with the classification of Excellent by the Portuguese Science Foundation. The EEC Research Group has about 50 persons, 15 of them being researchers holding a Ph D degree. Vice-President of ADAI, a non-profitable research association connected to the Department of Mechanical Engineering of the University of Coimbra. Has launched in 1994 the Measurement and Testing Laboratory of ADAI, which is accredited by the Portuguese Institute of Accreditation since 1996. He is the Technical Responsible of this Laboratory that is the job place of 9 persons. Vice-President of Rehva. Chair of the Education Committee of Rehva. Performed research on the fields of indoor environmental quality, energy efficiency and sustainability, vehicle testing and aerodynamics,. Principal investigator and coordinator of 30 research projects sponsored by international, national and private organizations.; research; Coimbra; PT; 0000-0002-3915-0554; 9A17-9D4B-A0A9; staff; Celestino Rodrigues Ruivo. Concluiu o Doutoramento em Engenharia Mecânica em 2005 pela Universidade de Coimbra Faculdade de Ciencias e Tecnologia, Mestrado em Ciências da Engenharia Mecânica em 1993 pela Universidade de Coimbra Faculdade de Ciencias e Tecnologia e Licenciatura em Engenharia Mecânica em 1990 pela Universidade de Coimbra Faculdade de Ciencias e Tecnologia. Publicou 35 artigos em revistas especializadas. Possui 1 capítulo de um livro. Orientou várias dissertações de mestrado e coorientou duas. Participou como Investigador num projeto. Atua nas áreas de Ciências da Engenharia Mecânica com ênfase em Transferência de Calor e Massa.; Angrisani, Giovanni; Angrisani, Giovanni |
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| Assunto: | Desiccant wheel Experimental data Effectiveness method Validation Empirical correction |
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| Ano: | 2013 |
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| País: | Portugal |
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| Tipo de documento: | artigo |
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| Tipo de acesso: | acesso aberto |
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| Instituição associada: | Universidade de Coimbra |
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| Idioma: | inglês |
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| Origem: | Estudo Geral - Universidade de Coimbra |
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