Building Automation Lesson 5 Flashcards
What are the primary functions of an HVAc system ?(3)
Heating
Venting
Air conditioning
What are some additional functions of an HVAC system? (2)
Humidity control
Air filtration
What are the two groups of HVAC systems?
Forced air
Hydronic
What is the hub of a forced air system?
AHU (air handling unit)
List components associated with a forced- air, air handling unit (9)
- cooling coils/ heating coils
- dehumidifiers/humidifiers
- dampers
- ductwork
- Fans
- Filters
- sensors
Name the 5 types of air that AHUs manage
- Return air
- Outside air
- Mixed air
- Exhaust air
- Supply air
Name the two methods by which AHUs introduce conditioned air into building spaces to achieve climate control.
- Constant volume method
2. Variable volume method
List components associated with a hydronic heating or cooling system
- Pipes
- valves
- pumps
A ____is a device that transfers heat from one fluid to another without allowing the fluids to mix.
Heat exchanger
The two most common types of heat exchangers found in air- handling units
Heating coils
Cooling coils
What is the simplest forced air HVAC system configuration?
Single zone HVAC system
Heating and cooling coils are in series
What are the five requirements for comfort?
Temperature Humidity Filtration Circulation Ventilation
____is the most important property of air that is controlled by an HVAC system.
Temperature
The temperature of air that is measured by a thermometer freely exposed to the air but shielded from radiation and moisture is called____.
Dry Bulb Temperature
What is the undesirable variation of air temperature between the top and bottom of a space called?
Temperature stratification
