Discusses the various air-to-air energy recovery technologies and
their application in HVAC systems.
Topics include:
- Why recover energy?
- Sensible- versus total-energy recovery effectiveness
- Unbalanced airflow
- Outdoor-air preconditioning (or exhaust-air heat recovery)
- Supply-air tempering (or reheat) in series or parallel
- ASHRAE Standard 90.1
- Impact on first cost and operating cost
- Frost prevention methods
- Minimizing cross leakage
- Methods of capacity control
- Coil loops (or coil runaround loops)
- Fixed-plate heat exchangers (or air-to-air heat exchangers)
- Heat pipes
- Rotary heat exchangers (heat wheels, enthalpy wheels, passive desiccant wheels)
- ARI Standard 1060
- Controlling energy recovery devices in dedicated outdoor-air systems and mixed-air systems (constant volume, VAV)
- Economizer operation
- Active desiccant dehumidification systems
- Local versus centralized preconditioning
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