Visit the Energy Systems Laboratory Homepage.
Improving Control of a Dual-Duct Single-Fan Variable Air Volume Systems
Abstract
This paper discusses improved control strategies
for dual-duct single-fan variable air volume (VAV)
systems. Common control strategy for supply air
volume modulation is evaluated, and an improved air
volume control strategy that maintains separate cold
and hot air duct static pressure set points is presented.
The paper also explores the interactions between the
cold and hot deck temperatures and duct static
pressures, and discusses the impact of non-ideal deck
temperature settings on duct static pressures and
overall system energy consumption. To compensate
the negative impact of non-ideal cold and hot deck
temperature set points, the authors propose using
real-time duct static pressure readings as feedback
signals to fine-tune the deck temperature set points.
These new control schemes can reduce simultaneous
cooling and heating while reducing fan power
consumption.
Citation
Wei, G.; Martinez, J.; Minihan, T.; Brundidge, T.; Claridge, D. E.; Turner, W. D. (2003). Improving Control of a Dual-Duct Single-Fan Variable Air Volume 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 /5219.