Commissioning of a Segmented Wand for Evaluating Airflow Performance of Fans in Livestock and Poultry Housing
Date
Authors
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
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.
Dates of Existence
1905–present
Historical Names
- Department of Agricultural Engineering (1907–1990)
Related Units
- College of Agriculture and Life Sciences (parent college)
- College of Engineering (parent college)
- Department of Industrial Education and Technology, (merged, 2004)
Journal Issue
Is Version Of
Versions
Series
Department
Abstract
Ventilation rate estimates play an important role in evaluating the thermal environment and determining emission rates from livestock and poultry housing. Currently, the standard method to measure in situ ventilation rates is the Fan Assessment Numeration System (FANS). A similar sensing system is needed for extension personnel that eliminates the labor and set-up requirements of FANS. In order to efficiently and cost-effectively estimate ventilation rates, a Segmented Wand for Evaluating Airflow Performance (SWEAP) was developed. The objectives of this research were to: (i) design and construct a hand-held device capable of measuring in situ fan intake flowrate, (ii) evaluate SWEAP against a FANS unit, and (iii) assess the in-field applicability of SWEAP. Eight uniformly spaced Omnidirectional Thermal Anemometers (OTA) were heated above ambient temperature using Constant Temperature Anemometer (CTA) feedback methodology. The flowrate was determined by multiplying the cross sectional area associated with each OTA, with SWEAP placed at the intake of a tested fan. SWEAP was calibrated against a FANS unit (42-0002) for several flowrates and to accommodate typical agricultural-use fans. Several in situ fans ranging in diameters: 36 cm (14 in.), 61 cm (24 in.), 91 cm (36 in.), and 122 cm (48 in.), and capacity were tested with SWEAP to determine the feasibility of field applications. In-lab SWEAP traverse rates of 76 ±13, 127 ±13, 178 ±13, and 229 ±13 mm s-1 (3.0 ±0.5, 5.0 ±0.5, 7.0 ±0.5, and 9.0 ±0.5 in. s-1) were tested with no significant difference found between the 76 ±13 mm s-1, 127 ±13 mm s-1 rates. A nominal SWEAP traverse rate of 127 ±13 mm s-1 was used for subsequent in-field testing. Results showed that there was no significant difference (p>0.05) between SWEAP and FANS airflow means for the 36 cm fan, 61 cm fan, and the 91 cm fan. The average percent difference between SWEAP and FANS for all in-lab and infield fans tested was less than 5.0%. SWEAP can be used by extension personnel to quickly and accurately evaluate airflow for multiple fans.
Comments
This proceeding is published as DeVoe, Katlyn R., Steven J. Hoff, Yun Gao, and Brett C. Ramirez. "Commissioning of a Segmented Wand for Evaluating Airflow Performance of Fans in Livestock and Poultry Housing." In 2016 ASABE Annual International Meeting. American Society of Agricultural and Biological Engineers, 2016. doi: 10.13031/aim.20162460503. Posted with permission.