Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)

Department / School

Agricultural Engineering


The need for improved production facilities is emphasized by the fact that beef consumption is at record levels in the United States with continued growth predicted. The annual per capita consumption of beef and veal in the United States was nearly 73 pounds in 1949 and increased 56 per cent to approximately 114 pounds per person by 1969. The demand for beef is also increasing in developed areas throughout the rest of the world. Increases in demands for beef have stimulated the beef industry to make significant gains in production. The production of beef in the United States has increased by 224 per cent during the last twenty years from 9,439,000,000 pounds to 21,125,000,000 pounds. Beef production in South Dakota paralleled national trends and is the dominant agricultural industry in the state. Livestock and livestock products accounted for over 80 per cent of South Dakota's 1.1-billion-dollar income from farm produce marketed in 1970. South Dakota had 1.7 million head of beef cows and marketed 552,000 head finished to slaughter weight in 1970 which ranked the state sixth in the nation in number of beef cows and tenth in fed cattle marketed. This represents a significant loss of potential income for beef producers and related industries in the state each year. Current national trends are toward greater specialization and increased size of production facilities. Due to severe climatic conditions, availability of space, pollution control regulations, labor. costs and other factors, trends in the upper Midwest are toward livestock confinement structures. Available design criteria for confinement housing often prove inadequate in meeting the needs of the producer and the livestock. Since beef is the major agricultural product in South Dakota and climatic conditions are severe, it is vital that a study be initiated which will ultimately provide a solution to environmental control problems. Therefore, this study was conceived to answer the following objectives: 1. Determine the total heat and moisture production in a closed confinement beef building under actual production conditions. 2. Determine sensible and latent heat production inside a closed confinement beef building. 3. Determine the effect of ventilation rates on latent heat production.

Library of Congress Subject Headings

Barns -- Heating and ventilation



Number of Pages



South Dakota State University