Infiltration Characteristics of Swine Finishing and Gestation Buildings: Review and Quantification
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Since 1905, the Department of Agricultural Engineering, now the Department of Agricultural and Biosystems Engineering (ABE), has been a leader in providing engineering solutions to agricultural problems in the United States and the world. The department’s original mission was to mechanize agriculture. That mission has evolved to encompass a global view of the entire food production system–the wise management of natural resources in the production, processing, storage, handling, and use of food fiber and other biological products.
History
In 1905 Agricultural Engineering was recognized as a subdivision of the Department of Agronomy, and in 1907 it was recognized as a unique department. It was renamed the Department of Agricultural and Biosystems Engineering in 1990. The department merged with the Department of Industrial Education and Technology in 2004.
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1905–present
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- Department of Agricultural Engineering (1907–1990)
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- College of Agriculture and Life Sciences (parent college)
- College of Engineering (parent college)
- Department of Industrial Education and Technology, (merged, 2004)
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Abstract
Infiltration is an integral part of the ventilation system and process. Infiltration affects the quality of the barn environment and can also increase the winter heating cost. Precise data on infiltration is very important in the design of ventilation systems for animal barns. Many researchers have suggested that ASHRAE’s ‘crack’ method is not suitable for predicting infiltration of animal barns. Among the available methods, pressurization methods are commonly used in infiltration quantification and the power law model gives the best prediction of the infiltration rate. For this research project, 18 swine finishing rooms and three swine gestation rooms were tested for their infiltration characteristics. At 20 Pa pressure difference across the room envelope, the average as-is leakage rate for the 18 swine finishing rooms was 6.43±1.68 ACH; whereas, the average leakage rates through curtains, fans and other components were 1.47±0.71 ACH (about 23% of as-is), 1.63±0.77 ACH (about 25% of as-is) and 3.33±1.23 ACH (about 52% of as-is), respectively. Of the three "filtered" sow barns that were monitored where air tightness is very important to prevent entry of viruses like PRRV, the more conventional designed facilities, where filters are only added to the ceiling attic inlets, were not very tight (roughly 2 ACH). A much tighter barn, with an infiltration value of 0.1 ACH, was obtained in a specially designed large sow building where the filters were built into the ends of the building and an extensive amount of foam sealant was used.
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This proceeding is from 2015 ASABE Annual International Meeting, Paper No. 152190046, pages 1-13 (doi: 10.13031/aim.20152190046). St. Joseph, Mich.: ASABE. Posted with permission.