Objectives
• Review/Learn about HVAC Configurations
Describing systems and processes in the
psychrometric chart
• Analyze processes in AHU and buildings
– Finish examples from the text book
Single zone CAV
Single zone multi-room CAV
Multi zone CAV with Reheater
Duct reheat unit
Multizone CAV Dual Duct System
Dual duct terminal (Mixing box)
Single zone VAV
Multi zone VAV
VAV box
Multi zone VAV with Reheater
CAV Dedicated Outdoor Air System
(DOAS)
with Fan Coil Units
Exhaust
100%OA
For ventilation
and humidity
control
Fan coil units for
heating and cooling
Fan Coil Units
Fan coil Units can be combined with mechanical ventilation or rely on infiltration
VAV Dedicated Outdoor Air System
(DOAS)
with occupancy sensors
Exhaust
100%OA
VAV box
CO2
For ventilation
and humidity
control
Fan coil units for
heating and cooling
VAV box
CO2
Fan Terminal Units
Same as fan coil
Can be with
or without
recirculation
HVAC Systems
Multi zone
Single zone
CAV
With and
without
humidity
control
VAV
VAV
With and Dual
without
duct
reheaters
CAV
Dual
With
reheaters duct
DOAS with
fan coils
This is not the complete list !
All Hydroinic
that relay on
infiltration
DOAS with
fan coils
Single-Zone Systems
• Zone – any space with a thermostat
Air conditioning
Recirculation
Reheat
Evaporative Cooler
Air-to-air heat exchanger
Heart recovery by
Air-to-air and air-water-air heat exchanger
Summary of HVAC Systems
• Show HVAC processes on a
psychrometric chart
• Draw condition lines
– Define sensible heat ratio
• Draw HVAC processes for real buildings
– Single zone
– Multiple zone
Reading assignments
related to the HVAC systems
Chapters 7 & 8
and
Handout Section on the course
website