Off-campus South Dakota State University users: To download campus access theses, please use the following link to log into our proxy server with your South Dakota State University ID and password.
Non-South Dakota State University users: Please talk to your librarian about requesting this thesis through interlibrary loan.
Document Type
Thesis - University Access Only
Award Date
1998
Degree Name
Master of Science (MS)
Department / School
Mechanical Engineering
Abstract
The objective of this study was to monitor and record cooling equipment performance in the H.M. Briggs Library for the 1998 cooling season. The measured data was used to calculate key performance parameters for the aforementioned cooling systems. The measured performance was then compared to manufacturer's rated performance values and that of a mathematical model. The following were concluded regarding the comparison of the measured performance vs. manufacturer's rated performance values and the mathematical model. Measured vs. Manufacturer's Performance
1. At 85°F and 46°F leaving condenser and leaving chilled water temperatures, respectively, the Briggs Library chiller appeared to perform worse than manufacturer's data. Further, the Briggs Library chiller appeared to perform slightly better than manufacturer's rated performance values as the load increased.
2. At 85°F and 48°F leaving condenser and leaving chilled water, respectively, the Briggs Library chiller appeared to perform worse than manufacturer's data.
3. At 87.5°F and 46°F leaving condenser and leaving chilled water, respectively, the Briggs Library chiller appeared to perform better than manufacturer's performance data. Further, the measured performance appeared better than the manufacturer's performance as the load increased. Measured vs. Mathematical Model
1. At 85°F and 46°F leaving condenser and leaving chilled water, respectively, the mathematical model overestimated power consumption at given loads.
2. At 85°F and 48°F leaving condenser and leaving chilled water, respectively, the Briggs Library chiller compared well with the mathematical model. Further, it appeared that the mathematical model tended to slightly underestimate power consumption at given loads.
3. At 87.5°F and 46°F leaving condenser and leaving chilled water, respectively, the Briggs Library chiller differed with the mathematical model. The computer model tended to overestimate power consumption at given loads. Effect of Leaving Condenser and Leaving Evaporator Water Temperature
1. A quadratic model is appropriate in describing the relationship of power vs. load.
2. Changing the leaving chilled water temperature given a leaving condenser water temperature did have a significant effect on power consumption.
3. Changing the leaving condenser water temperature given a leaving chilled water temperature did not have a significant effect on power consumption.
Library of Congress Subject Headings
Hilton M. Briggs Library
Refrigeration and refrigerating machinery -- Testing
Academic libraries -- Air conditioning -- South Dakota -- Brookings
Format
application/pdf
Number of Pages
96
Publisher
South Dakota State University
Recommended Citation
Hengeveld, Derek W., "Comparison of the Performance of the H.M. Briggs Library's Cooling System with Manufacturer's Rated Performance and a Common Mathematical Model" (1998). Electronic Theses and Dissertations. 6054.
https://openprairie.sdstate.edu/etd/6054