# APSM 171B: BASICS OF AIRFLOW, HEAT ENERGY & HEAT TRANSFER

## Foothill College Course Outline of Record

Foothill College Course Outline of Record
Units: 2.5
Hours: 30 lecture, 10 laboratory per quarter (40 total per quarter)
Prerequisite: Per California Code of Regulations, this course is limited to students admitted to the Sheet Metal Apprenticeship Program.
Degree & Credit Status: Degree-Applicable Credit Course
Foothill GE: Non-GE
Transferable: None
Repeatability: Not Repeatable

## Student Learning Outcomes

• A successful student will be able to describe CFM, FPM and Area used in air balance formulas.
• A successful student will be able to describe standard air and correction tables for non-standard air.

## Description

Students obtain an overview of the fundamental process of heat transfer and how pressures relate to air movement in HVAC systems.

## Course Objectives

The student will be able to:
A. Describe the flow of heat in objects
B. Describe cubic feet per minute (CFM)
C. Describe the pressures measured in airflow
D. Identify airflow formulas
E. Calculate airflow volume, velocity, velocity pressure and area
F. Describe standard air and correction tables for non-standard air
G. Describe temperature scales
H. Describe heat and heat transfer terminology

## Course Content

A. Describe the flow of heat in objects
1. Describe how heat flows in objects (Lec and Lab)
B. Describe cubic feet per minute (CFM)
1. Describe CFM, FPM and area used in air balance formulas (Lec and Lab)
C. Describe the pressures measured in airflow
1. Describe total, static and velocity pressure (Lec and Lab)
2. Perform airflow calculations for volume, flow rate and pressure (Lec and Lab)
D. Identify airflow formulas
1. Discuss air density and properties of moist air (Lec and Lab)
E. Calculate airflow volume, velocity, velocity pressure and area
1. Calculate correct flow rates for non-standard air (Lec and Lab)
F. Describe standard air and correction tables for non-standard air
1. Define value for standard air (Lec and Lab)
2. Describe weight and volume of standard air (Lec and Lab)
3. Calculate corrections to standard air for temperature and elevation (Lec and Lab)
G. Describe temperature scales
1. Define Fahrenheit, Celsius, Kelvin and Rankine temperature scales (Lec and Lab)
2. Convert temperatures from different scales (Lec and Lab)
H. Describe heat and heat transfer terminology
1. Define the terms BTU, BTUH, MBH and [delta]T (Lec and Lab)
2. Define and perform calculations using heat transfer formulas (Lec and Lab)
3. Explain total, sensible and latent heat (Lec and Lab)
4. Calculate percentage of outside air (Lec and Lab)
5. Describe functions of coils in heat transfer (Lec and Lab)

## Lab Content

A. Measure total, static, and velocity pressure
B. Measure total, sensible and latent heat

## Special Facilities and/or Equipment

A. Laboratory with sheet metal test and balance tools and sample system components
B. Personal protective equipment

## Method(s) of Evaluation

A. Results of written quizzes and tests
B. Evaluation of progress by periodic assignments
C. Comprehensive written final examination
D. Comprehensive final project

## Method(s) of Instruction

A. Lecture
B. Discussion
C. Demonstration
D. Lab assignments followed by discussion

## Representative Text(s) and Other Materials

International Training Institute for the Sheet Metal and Air Conditioning Industry. Testing, Adjusting & Balancing of Environment Systems. Alexandria, VA: International Training Institute, 2003.

NOTE: This is the standard Sheet Metal textbook/workbook used for this course. Although it may not be within 5 years of the required published date, it is the most current book used when teaching this course.

## Types and/or Examples of Required Reading, Writing, and Outside of Class Assignments

A. Sample reading assignment: Assigned text section on heat flow in objects.

B. Sample writing assignment: Perform airflow calculations for volume, flow rate and pressure.

Sheet Metal