Cryogenics is the science and technology associated with generation of very low temperatures below 123 K. The document discusses the definition of cryogenics, the history and development of cryogenic technology, temperature scales used in cryogenics, phase diagrams of cryogenic fluids, and properties of common cryogenic fluids like liquid nitrogen and liquid helium.

1. Cryogenics
Dr. Yash Pal
Associate Professor
School of Aeronautical Sciences
Hindustan Institute of Technology and Science

2. Cryogenics
• What is Cryogenics?
• The Chronology of Cryogenic Technology
• Definitions and different temperature
Scales
• T – s diagram of a Cryogenic Fluid
• Properties of the Cryogenic Fluids

3. Cryogenics
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•
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Genics –to produce
Kryo –Very cold (frost)
Cryogenics is the science and technology associated
with generation of low temperature below 123 K.
What is Cryogenics?

4. The Chronology

5. The Chronology

10. In thermodynamics,
the triple point of a
substance is the
temperature and
pressure at which the
three phases (gas,
liquid, and solid) of
that substance
coexist in
thermodynamic
equilibrium.