Animal and environmental performance of a retrofitted mechanical cross-ventilation system to a naturally ventilated freestall dairy barn in the midwestern U.S.

L. D. Jacobson; B. P. Hetchler; K. A. Janni; J. Linn; A. Heber; E. Cortus

Animal and environmental performance of a retrofitted mechanical cross-ventilation system to a naturally ventilated freestall dairy barn in the midwestern U.S.

L. D. Jacobson, B. P. Hetchler, K. A. Janni, J. Linn, A. Heber, E. Cortus

Bioproducts and Biosystems Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Scopus citations

Abstract

Two naturally-ventilated freestall dairy barns, constructed in the mid-western Un ited States in the mid 1990's, were recently (spring, 2007) retrofitted into mechanical "cross-flow" ventilation systems to improve cow comfort and performance. The two barns are part of the National Air Emission Monitoring Study (NAEMS), which is measuring gas and particulate emissions from livestock and poultry buildings and associated manure storages. The two, approximately 27-meter-wide barns were converted from natural ventilation to cross-flow ventilation systems by installing a continuous row of belt-driven, 127-cm diameter axial exhaust fans (59 and 66 fans respectively for barns 1 and 2) along one side of each barn. Air enters each barn along the opposite sidewalk. A solid plastic curtain baffle runs the length of both barns from the closed ridge peaks to the top of a row of headlocks along the feed manger to force ventilation air down to cow level. In addition, two rows of water fogging nozzles (I m spacing) were installed in both barns, one at the sidewall inlets and the other at the bottom of the interior baffle. The fogging nozzles provide evaporative cooling to the incoming and cross ventilating air. The new ventilation systems were able to maintain indoor air below ambient outdoor temperatures in the two dairy barns and provided convective cooling of the cows during warm summer days. Indoor air quality as measured by carbon dioxide and ammonia concentration were well within generally acceptable levels. Milk yield and feed efficiency improved in these two barns during the 4 summer (June - September) months of 2007 compared to the previous three summers (2004-2006) even though 2007 had greater number of days above 30 °C. Additional research is needed to show more statistical evidence of the biological improvements in herd performance from cross-flow ventilation /evaporative cooling systems.

Original language	English (US)
Title of host publication	Livestock Environment VIII - Proceedings of the 8th International Symposium
Pages	411-418
Number of pages	8
State	Published - 2008
Event	8th International Livestock Environment Symposium, ILES VIII - Iguassu Falls, Brazil Duration: Aug 31 2008 → Sep 4 2008

Publication series

Name	Livestock Environment VIII - Proceedings of the 8th International Symposium

Other

Other	8th International Livestock Environment Symposium, ILES VIII
Country/Territory	Brazil
City	Iguassu Falls
Period	8/31/08 → 9/4/08

Keywords

Animal cooling
Cross-flow
Environmental control
Ventilation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Jacobson, L. D., Hetchler, B. P., Janni, K. A., Linn, J., Heber, A., & Cortus, E. (2008). Animal and environmental performance of a retrofitted mechanical cross-ventilation system to a naturally ventilated freestall dairy barn in the midwestern U.S. In Livestock Environment VIII - Proceedings of the 8th International Symposium (pp. 411-418). (Livestock Environment VIII - Proceedings of the 8th International Symposium).

Animal and environmental performance of a retrofitted mechanical cross-ventilation system to a naturally ventilated freestall dairy barn in the midwestern U.S. / Jacobson, L. D.; Hetchler, B. P.; Janni, K. A. et al.
Livestock Environment VIII - Proceedings of the 8th International Symposium. 2008. p. 411-418 (Livestock Environment VIII - Proceedings of the 8th International Symposium).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Jacobson, LD, Hetchler, BP, Janni, KA, Linn, J, Heber, A & Cortus, E 2008, Animal and environmental performance of a retrofitted mechanical cross-ventilation system to a naturally ventilated freestall dairy barn in the midwestern U.S. in Livestock Environment VIII - Proceedings of the 8th International Symposium. Livestock Environment VIII - Proceedings of the 8th International Symposium, pp. 411-418, 8th International Livestock Environment Symposium, ILES VIII, Iguassu Falls, Brazil, 8/31/08.

Jacobson LD, Hetchler BP, Janni KA, Linn J, Heber A, Cortus E. Animal and environmental performance of a retrofitted mechanical cross-ventilation system to a naturally ventilated freestall dairy barn in the midwestern U.S. In Livestock Environment VIII - Proceedings of the 8th International Symposium. 2008. p. 411-418. (Livestock Environment VIII - Proceedings of the 8th International Symposium).

Jacobson, L. D. ; Hetchler, B. P. ; Janni, K. A. et al. / Animal and environmental performance of a retrofitted mechanical cross-ventilation system to a naturally ventilated freestall dairy barn in the midwestern U.S. Livestock Environment VIII - Proceedings of the 8th International Symposium. 2008. pp. 411-418 (Livestock Environment VIII - Proceedings of the 8th International Symposium).

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abstract = "Two naturally-ventilated freestall dairy barns, constructed in the mid-western Un ited States in the mid 1990's, were recently (spring, 2007) retrofitted into mechanical {"}cross-flow{"} ventilation systems to improve cow comfort and performance. The two barns are part of the National Air Emission Monitoring Study (NAEMS), which is measuring gas and particulate emissions from livestock and poultry buildings and associated manure storages. The two, approximately 27-meter-wide barns were converted from natural ventilation to cross-flow ventilation systems by installing a continuous row of belt-driven, 127-cm diameter axial exhaust fans (59 and 66 fans respectively for barns 1 and 2) along one side of each barn. Air enters each barn along the opposite sidewalk. A solid plastic curtain baffle runs the length of both barns from the closed ridge peaks to the top of a row of headlocks along the feed manger to force ventilation air down to cow level. In addition, two rows of water fogging nozzles (I m spacing) were installed in both barns, one at the sidewall inlets and the other at the bottom of the interior baffle. The fogging nozzles provide evaporative cooling to the incoming and cross ventilating air. The new ventilation systems were able to maintain indoor air below ambient outdoor temperatures in the two dairy barns and provided convective cooling of the cows during warm summer days. Indoor air quality as measured by carbon dioxide and ammonia concentration were well within generally acceptable levels. Milk yield and feed efficiency improved in these two barns during the 4 summer (June - September) months of 2007 compared to the previous three summers (2004-2006) even though 2007 had greater number of days above 30 °C. Additional research is needed to show more statistical evidence of the biological improvements in herd performance from cross-flow ventilation /evaporative cooling systems.",

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N2 - Two naturally-ventilated freestall dairy barns, constructed in the mid-western Un ited States in the mid 1990's, were recently (spring, 2007) retrofitted into mechanical "cross-flow" ventilation systems to improve cow comfort and performance. The two barns are part of the National Air Emission Monitoring Study (NAEMS), which is measuring gas and particulate emissions from livestock and poultry buildings and associated manure storages. The two, approximately 27-meter-wide barns were converted from natural ventilation to cross-flow ventilation systems by installing a continuous row of belt-driven, 127-cm diameter axial exhaust fans (59 and 66 fans respectively for barns 1 and 2) along one side of each barn. Air enters each barn along the opposite sidewalk. A solid plastic curtain baffle runs the length of both barns from the closed ridge peaks to the top of a row of headlocks along the feed manger to force ventilation air down to cow level. In addition, two rows of water fogging nozzles (I m spacing) were installed in both barns, one at the sidewall inlets and the other at the bottom of the interior baffle. The fogging nozzles provide evaporative cooling to the incoming and cross ventilating air. The new ventilation systems were able to maintain indoor air below ambient outdoor temperatures in the two dairy barns and provided convective cooling of the cows during warm summer days. Indoor air quality as measured by carbon dioxide and ammonia concentration were well within generally acceptable levels. Milk yield and feed efficiency improved in these two barns during the 4 summer (June - September) months of 2007 compared to the previous three summers (2004-2006) even though 2007 had greater number of days above 30 °C. Additional research is needed to show more statistical evidence of the biological improvements in herd performance from cross-flow ventilation /evaporative cooling systems.

AB - Two naturally-ventilated freestall dairy barns, constructed in the mid-western Un ited States in the mid 1990's, were recently (spring, 2007) retrofitted into mechanical "cross-flow" ventilation systems to improve cow comfort and performance. The two barns are part of the National Air Emission Monitoring Study (NAEMS), which is measuring gas and particulate emissions from livestock and poultry buildings and associated manure storages. The two, approximately 27-meter-wide barns were converted from natural ventilation to cross-flow ventilation systems by installing a continuous row of belt-driven, 127-cm diameter axial exhaust fans (59 and 66 fans respectively for barns 1 and 2) along one side of each barn. Air enters each barn along the opposite sidewalk. A solid plastic curtain baffle runs the length of both barns from the closed ridge peaks to the top of a row of headlocks along the feed manger to force ventilation air down to cow level. In addition, two rows of water fogging nozzles (I m spacing) were installed in both barns, one at the sidewall inlets and the other at the bottom of the interior baffle. The fogging nozzles provide evaporative cooling to the incoming and cross ventilating air. The new ventilation systems were able to maintain indoor air below ambient outdoor temperatures in the two dairy barns and provided convective cooling of the cows during warm summer days. Indoor air quality as measured by carbon dioxide and ammonia concentration were well within generally acceptable levels. Milk yield and feed efficiency improved in these two barns during the 4 summer (June - September) months of 2007 compared to the previous three summers (2004-2006) even though 2007 had greater number of days above 30 °C. Additional research is needed to show more statistical evidence of the biological improvements in herd performance from cross-flow ventilation /evaporative cooling systems.

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ER -

Animal and environmental performance of a retrofitted mechanical cross-ventilation system to a naturally ventilated freestall dairy barn in the midwestern U.S.

Abstract

Publication series

Other

Keywords

UN SDGs

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