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ASHRAE - Fundamentals of Refrigeration New

Course Description

CoursesPDH’sHeat Transfer and Basic Refrigeration Cycle1.5Thermodynamic States, Properties and Laws2Psychrometrics1Multi – Stage and Cascade Refrigeration Cycles2Refrigeration System Parameters and Performance0.5Refrigerants2

Every Course includes.

  • Reading Assignment
  • Learning Activities
  • Lesson Summary
  • Module Exam

Heat Transfer and the Refrigeration Cycle

Description:
This module provides an introduction to the concept of refrigeration and discusses the most commonly used refrigeration system, the vapor – compression refrigeration system, the relationship between the basic components of a vapor compression system, and also the heat pump cycle.

Learning Objectives:
On completion of this module, you should be able to.

  • Define refrigeration.
  • Identify the five types of refrigeration systems.
  • Name and describe the four basic components of a vapor – compression refrigeration system.
  • Describe the purpose and operation of a heat pump cycle.
  • Identify three applications of refrigeration.

Thermodynamic States, Properties and Laws

Description:
This module introduces the concepts of thermodynamic states, properties, and laws, efficiency (coefficient of performance) and defines the maximum coefficient of performance for a heat pump and refrigeration cycles.

Learning Objectives:
On completion of this module, you should be able to.

  • Identify common thermodynamic properties.
  • Define thermodynamic state.
  • Describe the first and second laws of thermodynamics.
  • Define efficiency (coefficient of performance).
  • Determine the maximum coefficient of performance of a heat pump and a refrigeration cycle.
  • Use the thermodynamic laws to perform energy calculations on simple refrigeration processes.

Psychrometrics

Description:
Psychrometrics is the field of engineering concerned with the physical and thermodynamic properties of gas – vapour mixtures.

Learning Objectives:
On completion of this module, you should be able to.

  • Define the terms used on a psychrometric chart.
  • Identify the major components of a psychrometric chart.
  • Use a psychrometric chart to determine moist air properties.
  • Plot cooling and dehumidification processes on a psychrometric chart.

Multi – Stage And Cascade Refrigeration Cycles

Description:
This module will introduce the concepts of single and multi – stage refrigeration cycles, as well as cascade refrigeration cycles. It will also discuss the various methods for metering the refrigerant flow to the evaporators, including the direct expansion system, the flooded system, and the recirculation system.

Learning Objectives:
On completion of this module, you should be able to.

  • Explain the ideal single – stage and two – stage refrigeration cycles.
  • Show the ideal single – stage and two – stage refrigeration cycles on a p – h diagram.
  • Explain the operation of a cascade refrigeration cycle.
  • Determine the thermodynamic state of the refrigerant at the inlet and outlet of each component in the ideal single – stage and two – stage refrigeration cycles.
  • Explain the operation of direct expansion, flooded, and recirculation refrigeration systems.

Refrigeration System Parameters And Performance

Description:
In this module, several refrigeration system performance parameters are defined. These parameters are useful for characterizing how well a particular system may be operating. Compressor performance is also discussed.

Learning Objectives:
On completion of this module, you should be able to.

  • Determine the overall system performance characteristics of a refrigeration system.
  • Determine compressor performance.
  • Explain deviations between actual and ideal refrigeration systems, using the p – h diagram.

Refrigerant.

Description:
This module provides an introduction to refrigerants, including selection, performance, safety, reliability, environmental impact, and economic viability.

Learning Objectives:
On completion of this module, you should be able to.

    • Explain why the list of available refrigerants has changed.
    • Characterize refrigerants according to ANSI/ASHRAE Standard 34.
    • Determine the maximum refrigerant concentration in air, based on the refrigerant’s toxicity level.
    • Identify two standards that are important in the selection of refrigerants and in the design of refrigeration systems.

PRICE:

$250

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