HVAC Systems: Overview
HVAC Systems: Overview
Michael J. Brandemuehl, Ph.D, P.E. University of Colorado Boulder, CO, USA
Overview
System Description
Secondary HVAC Systems
Air distribution
Room diffusers and air terminals
Duct Design Fan characteristics Air Handling Units
Water distribution
Cooling coils Pipes and pumps
Primary HVAC Systems
Electric chillers
Air and water cooled Compressor technologies Performance
Thermal chillers
Absorption Engine-driven
Cooling towers
Overall Design Process
Michael Brandemuehl
System Overview
Core Objectives: healthy, productive, comfortable indoor environment
Heating to perimeter spaces Cooling to perimeter and core spaces Humidification or dehumidification as needed Ventilation to occupied spaces
Deliver over time and space
Time and Space
HVAC needs in each room change over day and over year
At any time, may need heating and cooling in different rooms of building
Core needs cooling even in winter
HVAC system must meet simultaneous diverse loads
Michael Brandemuehl
System Options
Separate HVAC system for every zone
Residential Motel Strip mall
One HVAC system for entire building
Distribute heating, cooling, ventilation to individual zones
Typical Home System
AIRFLOW
(AIR CONDITIONING)
(WITH FAN AND FILTER) AIRFLOW
Michael Brandemuehl
Typical Large Commercial System
Distributed HVAC Systems
Packaged terminal air conditioner (PTAC) Water loop heat pump (WLHP) Packaged rooftop unit (RTU)
Michael Brandemuehl
Typical Small Commercial System With Rooftop Units
Packaged Rooftop Unit (RTU)
Michael Brandemuehl
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