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Bioresource and Agricultural Engineering

Selected Works

Environmental control

Articles 1 - 3 of 3

Full-Text Articles in Life Sciences

Climate Dependent Heat Stress Mitigation Modeling For Dairy Cattle Housing, Katlyn R. Devoe, Steven J. Hoff, Brett C. Ramirez, Lance H. Baumgard Aug 2019

Climate Dependent Heat Stress Mitigation Modeling For Dairy Cattle Housing, Katlyn R. Devoe, Steven J. Hoff, Brett C. Ramirez, Lance H. Baumgard

Brett Ramirez

Dairy cattle are susceptible to heat stress with reported milk production loss exceeding 1.2 billion dollars in 2010. Heat stress occurs when the local thermal environment prevents adequate dissipation of metabolic heat production over extended periods. Implementing mitigation strategies in order to reduce heat stress has been a crucial need as dairy housing has transitioned from pasture to indoor housing systems. In order to maximize production, producers need the most effective cooling system to reduce heat stress. A heat stress mitigation model was developed using TMY3 data sets as inputs. The objectives of this research were to: (i) analyze ...


Development And Validation Of A Spatial And Temporal Thermal Environment Sensor Array And Data Acquisition System, Brett C. Ramirez, Yun Gao, Steven J. Hoff Aug 2019

Development And Validation Of A Spatial And Temporal Thermal Environment Sensor Array And Data Acquisition System, Brett C. Ramirez, Yun Gao, Steven J. Hoff

Brett Ramirez

The Thermal Environment (TE) inside swine facilities has a substantial impact on animal growth performance and facility energy usage; therefore, proper control and measurement are required to maintain the optimal TE that maximizes feed efficiency and consumes minimal resources. An inexpensive and novel sensor network capable of capturing the spatial and temporal distribution of TE is needed to help guide control feedback sensor placement and identify potential issues with the facility’s environmental modification system. Hence, the objectives of this research were to: (1) design and construct a Thermal Environment Sensor Array (TESA) and (2) preliminarily evaluate the ability to ...


Thermal Environment Performance And Uniformity Assessment For A Novel Swine Breeding And Gestation Facility, Jay D. Harmon, Brett C. Ramirez, Steven J. Hoff Aug 2019

Thermal Environment Performance And Uniformity Assessment For A Novel Swine Breeding And Gestation Facility, Jay D. Harmon, Brett C. Ramirez, Steven J. Hoff

Brett Ramirez

The Thermal Environment (TE) inside swine facilities has a substantial impact on animal performance and facility energy usage; therefore, proper control and measurement are required to maintain the optimal TE that maximizes performance and consumes minimal energy. Currently, controllers only monitor and describe the TE with dry-bulb temperature (tdb); however, tdb does not account for all the factors that influence the TE. Therefore, a novel Thermal Environment Sensor Array (TESA) network and accompanying data acquisition systems were developed for a preliminary investigation inside a commercial, ~800 hd, positive pressure ventilated, filtered breeding facility located in central Iowa. Data from the ...