IMD 4031 - Refrigeration Fundamentals
Clock Hours: 100
Delivery Mode
on-ground
Course Description:
Refrigeration, relates to the cooling of air or liquids, thus providing lower temperatures to preserve food, cool beverages, make ice, and for many other applications. Air conditioning includes space cooling, heating, humidification, dehumidification, air filtration, and ventilation to condition the air and improve indoor air quality.
Student Learning Outcomes:
Course Competencies:
• Define temperature.
• Make conversions between the Fahrenheit and Celsius scales.
• Describe molecular motion at absolute zero.
• Define the British thermal unit.
• Describe heat flow between substances of different temperatures.
• Explain the transfer of heat by conduction, convection, and radiation.
• Discuss sensible heat, latent heat, and specific heat.
• State atmospheric pressure at sea level and explain why it varies at different elevations.
• Describe two types of barometers.
• Explain psig and psia as they apply to pressure measurements.
•Define matter. List the three states in which matter is commonly found.
•Define density.
•Discuss Boyle’s law.
•State Charles’ law.
•Discuss Dalton’s law as it relates to the pressure of different gases.
•Define specific gravity and specific volume.
•State two forms of energy important to the air-conditioning (heating and cooling) and refrigeration industry.
•Describe work and state the formula used to determine the amount of work in a given task.
•Define horsepower.
•Convert horsepower to watts.
•Convert watts to British thermal units.
•Discuss applications for high-, medium-, and low-temperature refrigeration.
•Describe the term ton of refrigeration.
•Describe the basic refrigeration cycle.
•Explain the relationship between pressure and the boiling point of water or other liquids.
•Describe the function of the evaporator or cooling coil.
•Explain the purpose of the compressor.
•List the compressors normally used in residential and light commercial buildings.
•Discuss the function of the condensing coil.
•State the purpose of the metering device.
•List four characteristics to consider when choosing a refrigerant for a system.
•List the designated colors for refrigerant cylinders for various types of refrigerants.
•Discuss different refrigerants and their applications.
•Describe how refrigerants can be stored or processed while refrigeration systems are being serviced.
•Plot a refrigeration cycle for refrigerants (R-22, R-12, R-134a,and R-502) on a pressure/enthalpy diagram.
•Plot a refrigeration cycle on a pressure/enthalpy diagram for refrigerant blends R-404A and R-410A.
•Plot a refrigeration cycle on a pressure/enthalpy diagram for a refrigerant blend (R-407C) that has a noticeable temperature glide.
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