ABSTRACT
Air conditioning and refrigeration (AC&R) systems are ubiquitous in modern society since they perform the key engineering function of transporting thermal energy from one physical location to another. In doing so, they are able to change the condition of a defined spatial environment to prescribe a particular temperature and humidity. While this may seem to be a simple task, it has had tremendous impact on the way we live and work. It is safe to say that nearly all people in the developed countries have interacted with AC&R systems throughout their lives.Whether traveling in an air-conditioned car or using products produced in an air-conditioned factory, there are very few people who have not had their lives touched by this valuable technology. Two key examples, buildings and refrigerated transport, give more detail as to the impact level of these systems on our society.
