Portland Community College | Portland, Oregon Portland Community College

CCOG for APR 274 Fall 2022

View archive version »
Course Number:
APR 274
Course Title:
HVAC, Steam & Hot Water Systems
Credit Hours:
Lecture Hours:
Lecture/Lab Hours:
Lab Hours:

Course Description

Covers the practical application of the laws of thermodynamics and heat transfer to operating, maintaining, and repairing hot water, steam, chilled water, refrigeration, heating, ventilating, and air conditioning systems found in todays industrial facilities, manufacturing plants, and processing plants. Includes the physical properties of water and refrigerants. Includes operation and servicing of controls and components of these systems. Includes chemical water treatment for boilers, chillers and cooling towers. Emphasizes achieving optimal energy use for thermal systems operation. Emphasizes safe work practices around thermal systems. Prerequisites: APR 272, and (WR 90 and RD 90) or IRW 90 and MTH 20 or equivalent placement or department permission. Audit available.

Addendum to Course Description

Required Course for Apprentices registered in the Millwright/Industrial Maintenance Technician Apprenticeship Program. It is open to any other student but requires Department Permission to take this course.

Intended Outcomes for the course

  • Use the principles of thermodynamics and heat transfer to effectively operate, repair, and maintain hot water boilers, steam boilers, and water chillers at an industrial worksite.
  • Use the principles of thermodynamics and heat transfer to effectively operate, repair and maintain forced-air heating, refrigeration, ventilating, and air conditioning systems at an industrial worksite.
  • Operate and maintain chemical water treatment systems for hot water boilers, steam boilers, cooling towers, and water chillers at an industrial worksite.
  • Operate and repair control systems for a variety of HVAC/R equipment at an industrial worksite.
  • Adjust a variety of thermal systems to obtain maximum energy efficiency at an industrial worksite.
  • *Demonstrate the functions of trade specific industrial systems (*required statewide outcome).
  • *Describe procedures for proper removal and disposal of hazardous materials (*required statewide outcome).

Course Activities and Design

Course Design is primarily lecture coupled with in-class demonstrations of selected types of thermal equipment. Course activities include guest speakers from service, installation, design, and distribution companies as well as guided field trips to selected industrial sites.

Outcome Assessment Strategies

Assessment will be accomplished using skills' checklists filled out by an adequate sampling of Millwright/Industrial Maintenance Technician Training Agents and/or an Apprentice's Journey Person

Course Content (Themes, Concepts, Issues and Skills)

  • Heat and heat transfer
  • Latent heat
  • Sensible heat
  • Conduction, radiation, convection
  • Pressure and measurements
  • Temperature and measurements
  • Temperature/pressure relationships
  • Boyle's Law, Charles Law, General Law of Perfect Gases, Dalton's Law and their applications
  • Work and Energy
  • Refrigeration Cycle and Refrigerants, CFC, Azeotropic, Zeotropic, HFC, CO2
  • Compressors, metering devices, evaporators, condensers, tubing
  • Refrigerants and boiling point 
  • Properties of water
  • Types of Boilers and applications
  • Types of Chillers and applications
  • Boiler operation,
  • : hot water and steam
  • Cooling Tower operation
  • Chiller operation
  • Components for hydronic systems
  • Trouble shooting
  • Maintenance
  • Safe work practices
  • Combustion analysis and system analysis for optimal energy savings