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Thesis - University Access Only
Master of Science (MS)
A parametric analysis was made on open and closed earth loop systems using the Kelvin line-source theory. The analyses included varying the pipe diameter, pipe type, pipe depth, fluid velocity, soil thermal conductivity, and fluid type (for closed systems). The open loop system uses substantially shorter pipe lengths and produces smaller heat loads than the closed system. With modifications to the line-source theory, an analysis was made on a swine facility requiring 8790 W of supplemental heat. The open-loop system would require 80 W to move the air through 400 m of pipe with an inlet temperature of -29°C. The closed-loop system would require 148 W to move the calcium chloride through 1653 m of pipe with an inlet temperature of -5°C. Making a comparison based on an equivalent inlet temperature of soc, the open-loop system would require 58 W to move the air through 275 m of pipe; but the system would produce only 2850 W of supplemental heat.
Library of Congress Subject Headings
Barns -- Heating and ventilation
Livestock -- Housing -- Heating and ventilation
Farm buildings -- Thermal properties
Number of Pages
South Dakota State University
Glawe, Barbara J., "Comparison of Earth Loop Systems for Livestock Housing" (1989). Electronic Theses and Dissertations. 4573.