Analysis of Air-Conditioning Controls for Building 4500 South, Oak Ridge National Laboratory

摘要

An analysis of the control systems on four air-conditioning units in Building 4500 South was conducted to determine if the source of frequent complaints from building occupants could be traced. The four units designated, AC-1, AC-2, AC-3, and T-18 are 100% outdoor air heating and cooling units with an air-flow capacity of 115,000 CFM, 103,000 CFM, 67,000 CFM, and 146,000 CFM respectively. The air-handling units were installed in the mid and late 60s and the control systems were designed to provide a constant leaving air temperature of 60 sup 0 F. The existing instrumentation being read by the operating personnel consisted of an entering air-temperature gage and a leaving air-temperature gage. Intermediate temperature gages to show the temperature of the air after the preheat coils were not present. Although not a perfect example of a well-tuned control system, there is nothing to indicate that major problems exist in the control system. (ERA citation 11:051047)