R23
MECH · 3-2
✓ VERIFIED VS. PUBLISHED SYLLABUS 2026-07-12
Refrigeration and Air Conditioning
JNTUK R23 · MECH · semester 3-2 · syllabus
This JNTUK R23 professional elective is listed for Mechanical Engineering (MECH). It is listed in semester 3-2. It carries 3 credits. The published coverage runs across 5 units, from Fundamentals of Refrigeration through Air Conditioning Systems.
Verified vs. published syllabus
Checked 12 Jul 2026
SOURCE DOCKET
Published evidence
✓ Verified
Checked 12 Jul 2026
Record 5 published units
Verification scope The title, semester placement, credits, complete syllabus and stated course outcomes are sourced directly from JNTUK's official R23 Mechanical Engineering course structure and syllabus PDF.
What you'll be able to do
Describe the basic concepts of refrigeration and its applications. Evaluate the performance parameters of refrigeration systems. Identify the desirable refrigerants and its use in various refrigeration systems. Analyze the psychrometric properties and processes used in Air Conditioning systems. Design of Air Conditioning systems for thermal comfort conditions.
5 units, from Fundamentals of Refrigeration to Air Conditioning Systems. Tick off units as you cover them — your progress stays on this device.
Unit-wise syllabus
0 / 5 COVERED
UNIT 01 — Fundamentals of Refrigeration
Introduction: necessity and applications, unit of refrigeration and COP, heat engine, refrigerator and heat pump, types of refrigeration systems and applications · Refrigerants: classification, desirable properties, nomenclature, commonly used refrigerants, alternate refrigerants · Greenhouse effect, global warming and ozone layer depletion, global warming potential · Air refrigeration system: working on reversed Carnot cycle and Bell-Coleman cycle, COP, open and dense air systems, applications
UNIT 02 — Vapour Compression Refrigeration System
Working principle, simple vapour compression refrigeration cycle, COP, representation of cycle on T-s and P-h charts · Effect of sub-cooling and superheating; actual vapour compression cycle and its applications · VCR system components: compressors, condensers, evaporators (classification and working), expansion devices (types and working) · Introduction to cryogenics: Joule-Thomson expansion, refrigerant mixtures, multi-stage vapour compression refrigeration
UNIT 03 — Vapour Absorption and Non-Conventional Refrigeration Systems
Vapour absorption refrigeration system: description and working of aqua-ammonia system, calculation of maximum COP · Lithium bromide-water system, principle of operation of three-fluid absorption systems, applications · Steam jet refrigeration system: principle of working, analysis, applications · Non-conventional refrigeration systems: thermoelectric refrigeration, vortex tube refrigeration, adiabatic demagnetization refrigeration
UNIT 04 — Psychrometry and Human Comfort
Psychrometry: introduction, psychrometric properties and relations, psychrometric chart · Psychrometric processes: sensible, latent and total heat, sensible heat factor and bypass factor · Human comfort: thermodynamics of the human body, effective temperature, comfort chart
UNIT 05 — Air Conditioning Systems
Introduction, components of an air conditioning system, classification of air conditioning systems, filters, grills and registers, fans and blowers · Central and unitary systems, packaged air conditioning systems, summer/winter/year-round systems, comfort and industrial air conditioning requirements, cooling load estimation · Design of air conditioning systems: summer air conditioning, ADP, system with ventilated and re-circulated air with and without bypass factor · RSHF, GSHF and ESHF, infiltration design conditions