Scribd
Upload
20 views16 pages

Classification of Refrigerants

The document covers the topic of Applied Thermodynamics, specifically focusing on refrigeration and the classification of refrigerants. It explains the process of refrigeration, defines a ton of refrigeration, and categorizes refrigerants into primary, secondary, halocarbon, azeotropic, inorganic, hydrocarbon, and others. Additionally, it provides examples and applications of various refrigerants used in different temperature conditions.

Uploaded by

Harshit Bhavsar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
20 views16 pages

Classification of Refrigerants

The document covers the topic of Applied Thermodynamics, specifically focusing on refrigeration and the classification of refrigerants. It explains the process of refrigeration, defines a ton of refrigeration, and categorizes refrigerants into primary, secondary, halocarbon, azeotropic, inorganic, hydrocarbon, and others. Additionally, it provides examples and applications of various refrigerants used in different temperature conditions.

Uploaded by

Harshit Bhavsar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 16

Presentation Title - 1

• Font style
Subject : Applied Thermodynamics
• Comic Sans
Subject MS
Code : 3161910
Chapter : Refrigerant and Refrigeration cycles
Topic : Classification of Refrigerants

- Prof J. P. Solanki

www.GTUSTUDIES.com
Refrigeration
 Refrigeration is the Process of reducing and
maintaining temperature of a system below
surrounding by continuously removing heat from it.

www.GTUSTUDIES.com
Unit of Refrigeration
 A Ton of Refrigeration (1 TR) is defined as,
Refrigerating effect produced by melting of 1 ton ice from
and at 0o C in 24 hours.

www.GTUSTUDIES.com
Refrigerant
 Refrigerant is a substance,
Which absorbs heat from lower temperature and
dissipate it to higher temperature.

www.GTUSTUDIES.com
Classification of Refrigerants

www.GTUSTUDIES.com
Classification
 Primary Refrigerants
Directly takes part in refrigeration system

 Secondary Refrigerants
First Cooled by primary refrigerants and then
used for cooling purpose

www.GTUSTUDIES.com
Halo Carbon
 Halogen + Chlorine / Bromine / Fluorine
 ASHRAE identified 42 Halo Carbon Compound
refrigerants
 Only few of them are useful
 Also Called Freons
 Wide range of boiling point
 Used for domestic, commercial and industrial
applications
 e.g. R11, R12 or Freon-11, Freon-12

www.GTUSTUDIES.com
Azeotrope Refrigerants
 An Azeotrope refrigerant is a mixture of two
or more components that boil at the same
temperature.
 Do not separate into their components with
change in pressure and temperature.

www.GTUSTUDIES.com
Refrigerant Chemical
Azeotropic mixing refrigerants
number formula
R-500 73.8% R-12 and 26.2% R-152 CCl2F2/CH2CHF2
CHCIF2/CCIF2CF3
R-502 48.8% R-22 and 51.2% R-115

CHF3/CCIF3
R-503 40.1% R-23 and 59.9% R-13

CH2F2/ CCIF2CF3
R-504 48.2% R-32 and 51.8% R-115

www.GTUSTUDIES.com
Inorganic Refrigerants
 Used universally for refrigeration before Halo
Carbon was introduced
Refrigerant Chemical Use
Name Formula
Ammonia NH3 Ice Plants
Water H20 Steam Jet Refrigeration
Air - Aero plane
Carbon Dioxide CO2 Ship
Sulphur Dioxide SO2 Small Commercial Unit
www.GTUSTUDIES.com
HydroCarbon Refrigerants
 Organic Compounds
 Highly Inflammable /explosive
 e.g.
Ethane(R-170),
Propane(R-290),
Butane(R-600) etc.

www.GTUSTUDIES.com
Water
 Used if temperature required is above 0OC
 Used in Air Conditioning Plant as secondary
refrigerant
 Cheapest, less corrosive, high specific heat

www.GTUSTUDIES.com
Brines
 Brine = Water + Salt
 Used if temperature required is below 0OC
 Used in ice plant, cooling of meat and fish etc.

www.GTUSTUDIES.com
Ethylene and
Propylene Glycol
 Miscible in all proportion with water
 Lowers the Freezing point
 Non corrosive and Non electrolytic
 Used as anti Freeze elements

www.GTUSTUDIES.com
Halo Carbon Compounds
 R-11, R-12, R-30 have low freezing point
 Used for low temperature refrigeration

www.GTUSTUDIES.com
Like, Share & Subscribe

www.GTUSTUDIES.com

www.GTUSTUDIES.com

You might also like