Evaporative cooling efficiency of pads consisting of vegetable loofah
Brazilian agroindustry has presented constant innovations in the use of equipment and materials, among which are those that generate artificial thermal conditioning inside the zootechnical facilities, through a direct evaporative cooling system (DEC). In order to mitigate the effects of high tempera...
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| Veröffentlicht in: | Comunicata Scientiae 2019, Vol.10 (1), p.38-44 |
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| creator | Melo Júnior, Júlio César Ferreira de Bamberg, João Victor Martins Machado, Neiton Silva Caldas, Emanuelly Nadja Gomes Rodrigues, Marcos Sales |
| description | Brazilian agroindustry has presented constant innovations in the use of equipment and materials, among which are those that generate artificial thermal conditioning inside the zootechnical facilities, through a direct evaporative cooling system (DEC). In order to mitigate the effects of high temperatures associated with low air humidity in buildings in the northeastern region of Brazil, the use of DEC systems is evident. Therefore, DEC’s built with evaporative pads constituted of alternative materials, prove to be an interesting and viable alternative. The aim of this work was to evaluate the cooling efficiency of the evaporative pads constituted of vegetable loofah. The experiment was performed at the Campus de Ciências Agrárias, Federal University of the São Francisco Valley (UNIVASF) in Petrolina, Pernambuco state. The experimental design was in randomized blocks, in a 4x4 factorial scheme, with 13 replicates. Air temperature and relative humidity values were collected before and after the passage through the pad for different flow velocities and pad thicknesses, in order to calculate the evaporative efficiency. The variance analysis was significant at 5% probability for the sources of variation of the pad thickness (0.05, 0.075, 0.1 and 0.125 m) and the air flow rate (0.076, 0.264, 0.459 and 0.773 m s-1), and the interactions. The highest efficiency, 57.0% was observed for the interaction between the thickness of 0.125 m and the speed of 0.773 ms-1 as adjusted model. |
| doi_str_mv | 10.14295/cs.v10i1.2930 |
| format | Article |
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In order to mitigate the effects of high temperatures associated with low air humidity in buildings in the northeastern region of Brazil, the use of DEC systems is evident. Therefore, DEC’s built with evaporative pads constituted of alternative materials, prove to be an interesting and viable alternative. The aim of this work was to evaluate the cooling efficiency of the evaporative pads constituted of vegetable loofah. The experiment was performed at the Campus de Ciências Agrárias, Federal University of the São Francisco Valley (UNIVASF) in Petrolina, Pernambuco state. The experimental design was in randomized blocks, in a 4x4 factorial scheme, with 13 replicates. Air temperature and relative humidity values were collected before and after the passage through the pad for different flow velocities and pad thicknesses, in order to calculate the evaporative efficiency. The variance analysis was significant at 5% probability for the sources of variation of the pad thickness (0.05, 0.075, 0.1 and 0.125 m) and the air flow rate (0.076, 0.264, 0.459 and 0.773 m s-1), and the interactions. The highest efficiency, 57.0% was observed for the interaction between the thickness of 0.125 m and the speed of 0.773 ms-1 as adjusted model.</description><identifier>ISSN: 2176-9079</identifier><identifier>ISSN: 2179-9079</identifier><identifier>ISSN: 2177-5133</identifier><identifier>EISSN: 2177-5133</identifier><identifier>DOI: 10.14295/cs.v10i1.2930</identifier><language>eng</language><publisher>Bom Jesus: Comunicata Scientiae</publisher><subject>Air conditioners ; Air flow ; Air temperature ; Cellulose ; Colleges & universities ; Computing time ; Cooling ; Cooling systems ; Design of experiments ; Educational institutions ; Efficiency ; Evaporative cooling ; Experimental design ; Flow rates ; Flow velocity ; High temperature ; High temperature effects ; Humidity ; Innovation ; Innovations ; Interactions ; Mechanical properties ; Probability theory ; Relative humidity ; Thickness ; Variance analysis ; Vegetables</subject><ispartof>Comunicata Scientiae, 2019, Vol.10 (1), p.38-44</ispartof><rights>2019. This work is published under https://creativecommons.org/licenses/by-nc/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>LICENCIA DE USO: Los documentos a texto completo incluidos en Dialnet son de acceso libre y propiedad de sus autores y/o editores. Por tanto, cualquier acto de reproducción, distribución, comunicación pública y/o transformación total o parcial requiere el consentimiento expreso y escrito de aquéllos. Cualquier enlace al texto completo de estos documentos deberá hacerse a través de la URL oficial de éstos en Dialnet. Más información: https://dialnet.unirioja.es/info/derechosOAI | INTELLECTUAL PROPERTY RIGHTS STATEMENT: Full text documents hosted by Dialnet are protected by copyright and/or related rights. This digital object is accessible without charge, but its use is subject to the licensing conditions set by its authors or editors. 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In order to mitigate the effects of high temperatures associated with low air humidity in buildings in the northeastern region of Brazil, the use of DEC systems is evident. Therefore, DEC’s built with evaporative pads constituted of alternative materials, prove to be an interesting and viable alternative. The aim of this work was to evaluate the cooling efficiency of the evaporative pads constituted of vegetable loofah. The experiment was performed at the Campus de Ciências Agrárias, Federal University of the São Francisco Valley (UNIVASF) in Petrolina, Pernambuco state. The experimental design was in randomized blocks, in a 4x4 factorial scheme, with 13 replicates. Air temperature and relative humidity values were collected before and after the passage through the pad for different flow velocities and pad thicknesses, in order to calculate the evaporative efficiency. The variance analysis was significant at 5% probability for the sources of variation of the pad thickness (0.05, 0.075, 0.1 and 0.125 m) and the air flow rate (0.076, 0.264, 0.459 and 0.773 m s-1), and the interactions. 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Scientiae</jtitle><date>2019</date><risdate>2019</risdate><volume>10</volume><issue>1</issue><spage>38</spage><epage>44</epage><pages>38-44</pages><issn>2176-9079</issn><issn>2179-9079</issn><issn>2177-5133</issn><eissn>2177-5133</eissn><abstract>Brazilian agroindustry has presented constant innovations in the use of equipment and materials, among which are those that generate artificial thermal conditioning inside the zootechnical facilities, through a direct evaporative cooling system (DEC). In order to mitigate the effects of high temperatures associated with low air humidity in buildings in the northeastern region of Brazil, the use of DEC systems is evident. Therefore, DEC’s built with evaporative pads constituted of alternative materials, prove to be an interesting and viable alternative. The aim of this work was to evaluate the cooling efficiency of the evaporative pads constituted of vegetable loofah. The experiment was performed at the Campus de Ciências Agrárias, Federal University of the São Francisco Valley (UNIVASF) in Petrolina, Pernambuco state. The experimental design was in randomized blocks, in a 4x4 factorial scheme, with 13 replicates. Air temperature and relative humidity values were collected before and after the passage through the pad for different flow velocities and pad thicknesses, in order to calculate the evaporative efficiency. The variance analysis was significant at 5% probability for the sources of variation of the pad thickness (0.05, 0.075, 0.1 and 0.125 m) and the air flow rate (0.076, 0.264, 0.459 and 0.773 m s-1), and the interactions. The highest efficiency, 57.0% was observed for the interaction between the thickness of 0.125 m and the speed of 0.773 ms-1 as adjusted model.</abstract><cop>Bom Jesus</cop><pub>Comunicata Scientiae</pub><doi>10.14295/cs.v10i1.2930</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0003-1392-1864</orcidid><orcidid>https://orcid.org/0000-0002-6567-1273</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Air conditioners Air flow Air temperature Cellulose Colleges & universities Computing time Cooling Cooling systems Design of experiments Educational institutions Efficiency Evaporative cooling Experimental design Flow rates Flow velocity High temperature High temperature effects Humidity Innovation Innovations Interactions Mechanical properties Probability theory Relative humidity Thickness Variance analysis Vegetables |
| title | Evaporative cooling efficiency of pads consisting of vegetable loofah |
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