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COOLING EFFECT ANALYSIS ON FOUR TYPES OF COOLING LYING-BEDS FOR PIGS
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Proceedings of the Seventh International Symposium, 18-20 May 2005 (Beijing, China) Publication Date 18 May 2005 701P0205.(doi:10.13031/2013.18358)
Authors: X.Y. Yuan, B. Li, G. Chen, Z.X. Shi, X.H. Ji
Keywords: Cooling lying-bed, the temperature difference, temperature ascend rate
In summer, cooling systems are applied in some swine buildings in China to alleviate heat stress
on pigs. Cooling lying-bed systems incorporating circulated water have been developed quickly
in China because they have advantages such as: no change of environmental humidity compared
to spraying cooling systems; and no high air speeds to blow over the pigs bringing unhealthy
conditions to pigs compared to the conventional ventilation system. An ideal cooling lying-bed
system should be circulated with low temperature water (15C-18C) for pigs experiencing
above30C ambient temperature. An excellent cooling lying-bed should provide high heat transfer
rates; the surface temperature should be comfortable for the pig lying on the pad; the cooling
water flow resistance should be low; and the price of each lying-bed should be affordable.