Visit the Energy Systems Laboratory Homepage.
Case Studies of Commissioning HVAC Systems
Abstract
This paper discusses problems found during third
party commissioning of projects where humidity
control was an indicator of significant problems.
Project 1 was an 8000 square foot library. Problems
found included air conditioning (A/C) and heating
systems both running during the summer, A/C
systems that ran most of the unoccupied period, and
relative humidity that was over 90% every night.
Project 2 was a 1200 square foot meeting room. The
outdoor air (OA) preconditioning system was found
to operate in hot gas bypass mode with little humidity
control capability.
Project 3 was the heating, ventilating, and air
conditioning (HVAC) system on a 400 square foot
library conference room with electric reheat for
humidity control on a three-ton split system. The
design was for a humidistat to call for cooling on high
humidity. Reheat was energized as the space
temperature dropped below the heating set point. The
system functions with a wide space temperature swing
as the control system oscillated through the
heating/cooling deadband.
Citation
Browning, B. K. (2001). Case Studies of Commissioning HVAC Systems. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /5107.