The thermodynamic efficiency of a refrigeration system depends mainly on its operating temperatures. However, important practical issues such as the system design, size, initial and operating costs, safety, reliability, and serviceability etc. depend very much on the type of refrigerant selected for a given application. Due to several environmental issues such as ozone layer depletion and global warming and their relation to the various refrigerants used, the selection of suitable refrigerant has become one of the most important issues in recent times. Replacement of an existing refrigerant by a completely new refrigerant, for whatever reason, is an expensive proposition as it may call for several changes in the design and manufacturing of refrigeration systems. Hence it is very important to understand the issues related to the selection and use of refrigerants.
This 2-hour course provides guidance on the responsible use and selection of refrigerants in vapor compression refrigeration systems.
This course is applicable to HVAC engineers, facility engineers, architects, environmentalists, operations and maintenance personnel, as well as consultants and contractors who construct, build and manage facilities.
The student must take a multiple-choice quiz consisting of twenty (20) questions at the end of this course to obtain PDH credits.
Specific Knowledge or Skill Obtained
This course teaches the following specific knowledge and skills:
- The differences between primary and secondary refrigerants
- The phenomenon of ozone layer depletion and its relationship to various refrigerants
- The criteria used in refrigerant selection
- The thermo-physical, environmental and economic properties of refrigerants
- The numbering system used for designating refrigerants
- The international treaties and regulation in force on choice of refrigerants
- The available options for the replacements for CFCs and HCFCs
Click on the following link to the PDF document to review the course material before taking the quiz for credit.
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