Xu, D. C.; Qiang, C.; Deng, S.; Turner, W. D.(Energy Systems Laboratory (http://esl.tamu.edu), Texas A&M University, 2002)
The University of Texas at San Antonio needs to expand their central chilled water distribution system as a result of planned additions to the
campus. The current distribution system may be inadequate for the planned expansions, and the Energy Systems Laboratory was hired to model the current system and provide inputs to UT-SA regarding both operational changes and design changes to the current distribution system.
Information about pumps, buildings and previous engineering reports were collected. A field survey was conducted. A base AFT simulation model of the UT-SA chilled water system based on 1997 loads was created. The simulation tool is AFT Fathom 5.0. The losses caused by bends, most of the tees, pipes, valves, and area changes were simulated. There are several tees where a no loss model was assumed, because the built in AFT mathematical loss model does not apply under
their specific circumstance. Therefore the simulation results may be slightly overestimated. The simulation model was compared to an earlier consultant's report and it appeared to be reliable, consistent, and conservative, but slightly optimistic in that the actual results could be slightly worse.