This Website provides Degree 5th Semester Physics B.sc(comp),B.Sc(Gen), related all Syllabus, Materials, ANU Previous years Question Papers, Important Questions List. All materials, Question papers are designed according to Acharya Nagarjuna University pattern.
Learning Outcomes:
Students after successful completion of the course will be able to
1. Identify various methods and techniques used to produce low temperatures in the Laboratory.
2. Acquire a critical knowledge on refrigeration and air conditioning.
3. Demonstrate skills of Refrigerators through hands on experience and learns about
refrigeration components and their accessories.
4. Understand the classification, properties of refrigerants and their effects on environment.
5. Comprehend the applications of Low Temperature Physics and refrigeration.
Contents
UNIT-I PRODUCTION OF LOW TEMPERATURE
Production of low temperatures-Introduction, Freezing mixtures, Joule-Thomson effect, Regenerative cooling, Different methods of liquefaction of gases, liquefaction of air, Production of liquid hydrogen and nitrogen, Adiabatic demagnetization, Properties of materials at low temperatures, Superconductivity
UNIT-II MEASUREMENT OF LOW TEMPERATURE
Gas thermometer and its correction and calibration, Secondary thermometers, resistance thermometers, thermocouples, Vapour pressure thermometers, Magnetic thermometers, Advantages and drawbacks of each type of thermometer.
UNIT-III PRINCIPLES OF REFRIGERATION
Introduction to Refrigeration- Natural and artificial refrigeration , Stages of refrigeration, Types of refrigeration – Vapor compression and vapor absorption refrigeration systems, Refrigeration cycle and explanation with a block diagram, Introductory ideas on air conditioning. Refrigerants-Introduction, Ideal refrigerant, Properties of refrigerant, Classification of refrigerants, commonly used refrigerants, Eco-friendly refrigerants
UNIT-IV COMPONENTS OF REFIGERATOR
Refrigerator and its working, Block diagram, Coefficient of Performance (COP), Tons of refrigeration (TR) and Energy Efficiency Ratio (EER), Refrigerator components: Types of compressors, evaporators and condensers and their functional aspects, defrosting in a refrigerator, Refrigerant leakage and detection
UNIT-V APPLICATIONS OF LOW TEMPERATURE & REFRIGERATION
Applications of Low temperatures: Preservation of biological material, Food freezing, liquid nitrogen and liquid hydrogen in medical field, Superconducting magnets in MRI- Tissue ablation (cryosurgery) – Cryogenic rocket propulsion system. Applications of refrigeration: Domestic refrigerators, Water coolers, Cold storages, Ice plants, Food preservation methods, Chemical and Process industries, Cold treatment of metals, Construction field, Desalination of water, Data centers.
LOW TEMPERATURE PHYSICS & REFRIGERATION-6B E.M Material-1 Download Click Here
LOW TEMPERATURE PHYSICS & REFRIGERATION-6B E.M Material-2 Download Click Here
LOW TEMPERATURE PHYSICS & REFRIGERATION-6B T.M Material Download Click Here