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 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.
Ashrae. 1983. Part 1: Air-handling equipment. In: American Society of Heating, Refrigeration and Airconditioning Engineers, ASHRAE Equipment Handbook, Atlanta, EUA, p. 1-10.
Chen, Q., Shi, Q., Gorb, S.N., Li, Z. 2014. A multiscale study on the structural and mechanical properties of the luffa sponge from Luffa cylindrica plant. Journal of biomechanics 47: 1332-1339.
Ferreira, D.F. 2014. Sisvar: a guide for its bootstrap procedures in multiple comparisons. Ciência Agrotecnologia 38: 109-112.
Jadoski, C.J., Klar, A.E., Maggi, M.F., Ramiro, J., Santos, A.B.A., Fulan, S.R. 2006. Distribuição da evaporação no interior de um ambiente protegido. Irriga 11: 246-256.
Maggi, M.F., Jadoski, C.J., Denega, S., Brunetta, L., Scabeni, C. 2008. Evaporation distribution in greenhouse using three evaporation heights. Pesquisa Aplicada Aplicada & Agrotecnologia 1: 122-125.
Liao, C., Chiu, K. 2002. Wind tunnel modeling the system performance of alternative evaporative coolings pads in Taiwan region. Building and Environment 37: 177-187.
Maurya, R., Shrivastava, N., Shrivastava, V. 2014. Performance evaluation of alternative evaporative cooling media. International Journal of Scientific & Engineering Research 5: 676-684.
Melo Júnior, J.C.F., Lima, A.M., Teixeira, M.V., Conceição, G.C., Santos, L.R. 2014. Depleção de água no substrato e doses de fertilizante Osmocote na formação de mudas de mamoeiro. Comunicata Scientiae 5: 499-508.
Oliveira, R.S., Henríquez, J.R., Primo, A.R.M. 2012. Eficiência de painéis de fibras vegetais utilizados para sistemas de resfriamento evaporativo direto: um estudo experimental. Rev. Tecnol. Fortaleza 33: 32-45.
Papanicolaou, G.C., Psarra, E., Anastasiou, D. 2015. Manufacturing and mechanical response optimization of epoxy resin/Luffa Cylindrica composite. Journal of Applied Polymer Science 132: 1-12.
Perin, J., Gaggini, T.S., Manica, S., Magnabosco, D., Bernardi, M.L., Wentz, I., Bortolozzo, F.P. 2016. Evaporative snout cooling system on the performance of lactating sows and their litters in a subtropical region. Ciência Rural 46: 342-347.
Riangvilaikul, B., Kumar, S. 2010. An experimental study of a novel dew point evaporative cooling system. Energy and Buildings 42: 637-644.
Seki, Y., Sever, K., Erden, S., Sarikanat, M., Neser, G., Ozes, C. 2012. Characterization of Luffa cylindrica fibers and the effect of water aging on the mechanical properties of its composite with polyester. Journal of Applied Polymer Science 123: 2330-2337.
Vigoderis, R. B., Tinôco, I. F. F., Lacerda filho, A. F., Silva, J. N., Gates, R. S., Pauli, D. G., Silva, C. E., Guimarães, M. C. C. 2007. Construção de túnel de vento reduzido, visando à avaliação de argila expandida em sistemas de resfriamento adiabático evaporativo para arrefecimento térmico em galpões de produção animal. Engenharia na Agricultura 15: 191-199.
How to Cite
All articles published may be reproduced or utilized in any form or by any means whether specified Comunicata Scientiae, author(s), volume, pages and year. The authors are responsible for all the statements and concepts contained in the article.