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The Temperature and Relative Humidity Control in Cushing Library
Abstract
Cushing Library located on TAMU campus is a
special building, which needs precise temperature
and relative humidity control, because it stores a
number of rare collections and memorial books.
There are five air-handling units (AHUs) serving the
building. This paper will concentrate the unit, which
serves the book stacks. This AHU is a multiple zone,
constant air volume (MZCAV) system, with reheat
and direct digital control (DDC). It has a standard
cooling coil, glycol cooling coil, steam humidifier,
and heat recovery. The chilled water to the standard
cooling coil is served by the chilled water loop on the
campus. There is a glycol chiller for the glycol
cooling coil for added dehumidification ability.
Because of programming problems and hardware
problems, the relative humidity was not controlling
properly. In this paper, the new control program for
temperature and relative humidity control is
implemented and the energy savings from the new
control program is estimated. The temperature and
relative humidity are now under control.
Citation
Liu, C.; Deng, S.; Claridge, D. E.; Turner, W. D.; Bruner, H., Jr. (2002). The Temperature and Relative Humidity Control in Cushing Library. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /5167.