Lesson 1 - Conditioning the Air

Topics:

Human comfort; Heat generation in buildings; Thermal zones; Types of HVAC systems; Guidelines for HVAC

Learning Objectives:
– Explain the various environmental factors affecting human comfort.
– Interpret the ASHRAE comfort chart.
– Differentiate between sensible and latent heat.
– Explain the operation of the components in a basic al-air HVAC system.
– Name the different kinds of single-path and multiple-path HVAC systems, tell how each operates, and list ways to conserve energy in each type.


Lesson 2 - Managing Airflow in HVAC Systems

Topics:

Air pressure within a duct; Airflow measuring devices; Building ventilation requirements; Heat recovery systems; Component maintenance

Learning Objectives:
– Compare and contrast static pressure, velocity pressure, and total pressure.
– Define ventilation air and tell how to determine ventilation air requirements.
– Calculate the amount of energy needed to heat or cool outside air.
– Name four types of heat recovery systems and explain how each works.
– Explain where and why exhaust systems are used and how they may be installed.


Lesson 3 - Conserving Energy in Heating Systems

Topics:

Warm air furnaces; Boilers; Furnace and boiler maintenance; Stack gas analysis; Purchased steam, hot water; Metering steam

Learning Objectives:
– part of an energy conservation program.
– Detail the types of maintenance required on various types of furnaces.
– Tell how to locate and correct energy waste in steam and hot water distribution systems.
– Explain the importance of steam traps and describe their operation and maintenance.
– List ways energy may be saved in humidification systems.


Lesson 4 - Conserving Energy in Cooling Systems

Topics:

Mechanical compression and absorption systems; External and internal controls; Evaporator and condenser temperatures; Self-contained units; Heat pumps; Refrigerators/freezers

Learning Objectives:
– Compare and contrast the operation of a mechanical compression system and an absorption system.
– Define external and internal controls for refrigeration and give examples of each.
– Explain how evaporator and condenser temperatures influence energy consumption.
– Name several different methods for cooling condensers.
– Describe the basic operation of a heat pump and tell how it differs from other air conditioning systems.


Lesson 5 - Reducing Losses in Distribution Systems

Topics:

Fans; Air duct insulation; Hydronic system balancing; Piping system insulation; Maintaining pumps; Strainers; Control valves

Learning Objectives:
– Define the term fluid and discuss the importance of reducing a fluid's resistance to flow.
– List several ways to reduce flow resistance in air distribution systems.
– Discuss the purpose of insulating air ducting and tell how insulation is applied.
– Explain how flow resistance can be reduced in piping systems.
– Name several types of control valves, tell where each is used, and explain the importance of good valve maintenance.