Cryogenics is the study of the properties of matter at very low temperatures. (The word is derived from the Greek kryos, meaning “icy cold.”) The highest temperature dealt with by cryogenics is about -100 degrees C (-148 degrees F), and the lowest is the absolute zero temperature of -273.15 degrees C (-459.67 degrees F). It is a fundamental theorem of thermodynamics that absolute zero can be approached but can never actually be reached. In cryogenic studies the standard practice is to express temperatures in the lowest range by using the Kelvin scale, with Celsius-size degrees … Continue Reading “The Study of Cryogenic Engineering”