Book chapter
AHU AFDD
Automated Diagnostics and Analytics for Buildings, pp 467-489
2015
Abstract
An air handling unit (AHU) connects primary heating and cooling plants with building zones and controls building ventilation air intake. The number and type of sensors equipped in a typical AHU vary greatly. Newer AHUs are normally instrumented more heavily than older ones. The most commonly available measurements include: supply, return, and mixed air temperatures, outdoor air temperature. The speed of the supply fan is modulated to maintain duct static pressure at a static pressure setpoint. The control sequence used to control the return fan can be in one of four typical modes, namely, fan speed matching, air flow rate matching, air flow rate differential, or return fan off. The regions correspond to the output from a single PI control algorithm that is split to control the heated water coil valve, the outdoor air damper, and the chilled water coil valve.
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Details
- Title
- AHU AFDD
- Creators
- Jin Wen - Drexel UniversityAdam Regnier - Drexel University
- Contributors
- Barney L Capehart (Editor)Michael R Brambley (Editor)
- Publication Details
- Automated Diagnostics and Analytics for Buildings, pp 467-489
- Publisher
- Routledge
- Edition
- 1
- Resource Type
- Book chapter
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Other Identifier
- 991021960801304721