Refrigeration

By Phil Boudreau As discussed in Part I in Mechanical Business Jan/Feb 2023, workplace accidents are frequently the result of taking shortcuts and/or using tools incorrectly and/or ignoring safety controls. The following are additional safety considerations when working in the field Hot and cold surfaces The…

Workplace accidents are generally the result of taking shortcuts and/or using tools incorrectly and/ or bypassing safety controls. It is the responsibility of all technicians to ensure work is done in a safe...

Refrigeration pros want to know – in this issue I provide answers to the questions I was asked most often during the past year. The questions and answers are not in any particular order...

Approximately 30 years ago, several refrigerants emerged as alternatives for chlorine-containing CFCs. Just a few examples of some of these alternatives are R401A, R401B, R402A, R402B, etc. The majority of these refrigerants were in the R400-series category and are also referred to as zeotropic refrigerants...

One of the main challenges with using carbon dioxide as a refrigerant is its low critical point of approximately 87.8°F or 31°C. Historically, when the critical point of a refrigerant is lower than the ambient air, it was dismissed as a viable

By Phil Boudreau Subcooling is simply the process of reducing the temperature of the refrigerant below its saturation temperature. Natural subcooling takes place as the cool ambient temperature or cool fluid temperature enters the condenser and removes additional heat from the already condensed liquid. Mechanical subcooling is a…

In Part I in the November/December 2020 issue (available online at www.mechanicalbusiness.com), the need for oil cooling in screw compressors at higher compression ratios was...