MCCCD Program Description

Refrigeration Components and Applications I

Course: FAC101

First Term: 2009 Spring

Lecture 2 Credit(s) 2 Period(s) 2 Load
Subject Type: Occupational
Load Formula: S

Description: Major components of refrigeration systems. Properties of refrigerants and piping practices. Principles of pressure, work, energy, power, matter, internal energy, heat, temperature and the ideal gas processes. Saturated and superheated vapors. Pressure-enthalpy chart and its component parts, vapor compression system, cycle analysis of a single saturated cycle.

MCCCD Official Course Competencies
1. Identify each component of the refrigeration system and its related function. (I) 2. Determine specific properties of refrigerants based on the pressure temperature chart (p-t). (II) 3. Apply knowledge of terms and equations related to mass, density, flow, acceleration, and gravity. (III) 4. Explain the concept of pressure including its units of measurement and methods for measuring it. (IV) 5. Compare and contrast specific types of evaporators. (V) 6. Perform calculations to include work and power, temperature, and changes in heat and gases. (V, VI, VII, VIII) 7. Describe matter including its specific states and molecular make-up. (IX) 8. Differentiate between temperature and heat. (X) 9. Describe specific terms related to heat, methods of heat transfer, and the direction and ratio of heat transfer. (XI) 10. Interpret pressure-temperature tables. (XII) 11. Describe the refrigeration process, component parts, and function. (XIII) 12. Plot a simple saturated refrigeration cycle on the p-h chart. (XIV) 13. Compare and contrast specific methods of defrost. (XV) 14. Select proper refrigerant piping. (XI) 15. Describe the major types of metering devices and explain operations of capillary tubes, thermostatic expansion valves, automatic expansion valves and the process for checking superheat. (XV) 16. Define specific terms related to the setting and operation of pressurecontrols including, but not limited to: low pressure, high pressure, dual pressure, oil pressure and pressure operated timing divices. (XVI)
MCCCD Official Course Competencies must be coordinated with the content outline so that each major point in the outline serves one or more competencies. MCCCD faculty retains authority in determining the pedagogical approach, methodology, content sequencing, and assessment metrics for student work. Please see individual course syllabi for additional information, including specific course requirements.

MCCCD Official Course Outline
I. Refrigeration Components A. Compressor B. Evaporator C. Condenser D. Metering Device II. Refrigerants Tables and Properties A. Definition B. Saturated pressure - temperature tables C. Properties 1. non-toxic 2. non-flammable 3. non-explosive 4. mixes well with oil 5. high latent heat content 6. easy to detect D. Safety III. Specific Terms and Equations A. Terms 1. Mass and density 2. Specific gravity 3. Mass and volume flow ratio 4. Velocity and speed 5. Acceleration 6. Acceleration of gravity B. Equations 1. Mass and density 2. Specific gravity 3. Mass and volume flow ratio 4. Velocity and speed 5. Acceleration 6. Acceleration of gravity IV. Pressure - Its Units and Methods of Measuring A. Pressure B. Units pounds/area C. Methods of measuring 1. Atmospheric 2. Barometers 3. Pressure gauges 4. Manometers 5. Bourdon gauges 6. Absolute pressure V. Work, Power and Equations A. Work B. Power C. Equations 1. Work 2. Power VI. Temperature Measurements and Calculations A. Temperature measuring B. Scales 1. Celsius 2. Fahrenheit 3. Kelvin 4. Rankine C. Calculate scale changes 1. Celsius c=f-32/18 2. Fahrenheit f=(18) (c)+32 3. Kelvin C=273 4. Rankine F+460 VII. Calculate Heat Changes A. Q=MC (T2-T1) sensible-temperature change B. Q=(M) (hif) latent-fusion C. Q=(M) (hfg) latent-vaporization D. Mechanical energy Q=w/j VIII. General Gas Laws A. Laws 1. General B. Calculate changes in gases IX. Matter and Molecular Make-up A. Matter B. States of matter 1. Solid 2. Liquid 3. Vapor (gaseous) X. Temperature and Heat A. Temperature characteristics B. Heat characteristics C. Differences XI. Direction and Tate of Heat Transfer, Methods of Heat Transfer and Associated Terms A. Terms 1. British thermal unit 2. Specific heat 3. Sensible heat 4. Latent heat 5. Super heat B. Heat transfer 1. Rate 2. Direction 3. Methods C. Other XII. Pressure-Temperature Tables A. Pressure 1. Gauge 2. Absolute B. Temperature relationship C. Table components 1. Temperature 2. Pressure 3. Volume 4. Density 5. Enthalpy 6. Entropy XIII. Refrigeration Process A. Process B. Components C. Function XIV. Saturated Refrigeration Cycle A. Simple refrigeration cycle B. Plotting cycle C. p-h diagram VX. Defrost Methods A. Time and temperature (off cycle) B. Electric C. Hot gas (reverse cycle) D. Cool gas E. Brine F. Heat bank G. Re-evaporate H. Multiple evaporators 1. open drive 2. semi-hemetic 3. hemetic C. Compression ratio - absolute discharge/absolute suction XIII. Condensers/Functions A. Air cooled 1. static 2. forced convection B. Water cooled 1. tube within a tube 2. shell and coil 3. shell and tube C. Evaporative D. Condenser functions 1. desuperheats 2. condenses 3. subcools E. Condensing Temperature 1. air cooled 2. water cooled XIV. Evaporators A. Types 1. plate 2. pipe 3. finned a. natural convection b. forced convection B. Types of refrigerant feed 1. DX - direct expansion 2. flooded C. Evaporator pressure XV. Metering Devices A. Types 1. hand operated 2. capillary tube 3. automatic expansion valve (AXV) 4. thermostatic expansion valve (TXV) 5. low-side float 6. high-side float 7. thermo-electric B. Operation 1. capillary 2. automatic expansion valve (AXV) 3. thermostatic expansion valve (TXV) C. Superheat measurement XVI. Pressure Controls - Operation A. Types 1. oil pressure 2. timing devices 3. low pressure 4. high pressure 5. dual pressure B. Setting - Definitions C. Terms 1. cut-in 2. cut-out 3. differential 4. range

MCCCD Governing Board Approval Date: 11/25/2008

All information published is subject to change without notice. Every effort has been made to ensure the accuracy of information presented, but based on the dynamic nature of the curricular process, course and program information is subject to change in order to reflect the most current information available.