DGET Syllabus Refrigeration & Air Conditioning
List of Topics
First semester
(1). Importance of the trade in domestic, industrial & commercial fields. Industrial safety & fire tighting, occupational health & safety.
(2). Allied trade knowledge. Basic fitting, welding, sheet metal work. Concept of shop floor
layout of the trade
(3). AC Induction Motor single phase (split phase, capacitor, shaded pole, repulsion) & three phase (squirrel cage & slip ring).
(4). Transformer single phase (auto transformer & Current transformer, Potential transformer) and threephase. Inverter controls EER motors.
(5). Basic Electronics. Concept ofSemi conductor, Rectifier, Transistor , FET, Mosfet,
Bipolar Transistors, lGBT(lntegated Bi-polar Transistor) , IC, Thermister, transducer,
function. Concept of Microprocessor, PLC, Regulated Power supplies, SMPS.
(6).Fundamentals and different terminology of RAC machineries. Laws of Thermodynamics,
Gas laws, Carnot cycle and reverse Carnot cycle.
(7). Methods of Rcfrigeralion-lce refrigeration, Dry ice, Steam jet, Gas throttling , Liquid Gas, Air refrigeration, Vapour absorption, Vapour compression, T hermo electric, magnetic, Thermo acoustic, Pulse tube, Vortex tube,
(8).Types of refrigeration systems and cycles. Capacity of RAC machineries, applications in domestic, commercial and industrial flelds.
(9). Description of major components used in RAC systems. Function, construction,
application of domestic and commercial applications,
(10). Types of compressor used in domestic appliances Reciprocating Rotary Scroll screw etc.
(11). Types of condenser used in domestic appliances Water cooled, Air cooled Evaporative
etc.
(12). Expansion Device -types, construction, working , adjustments & AppIication.
(13). Evaporalor-types (domestic & Commercial) ,construction working ( Direct & Indirect
systems), DX Chiller, FIooded ,Types & application.
(14) Evaporator -types (domestic & Commercial ) , construction , workIng (Direct & Indirect systems) ,DX Chiller Flooded, types & appIication.
(15). Secondary Refrigerants , Properties of brines & glycols. Application of various brines
Inhibitor & other secondary Refrigerants.
(16). Basic concepts OI Tribology Iubricants & Iubrication In RAC compressors, properties oI lubricants thermal insulation types & function Properties of insulating materials.
(17). Thermal Insulation types ,selection of Insulating malerial, Duct Insulation & Properties of insulating materials.
(18). Conventional c, frost free refrigerator, Water cooler, Deep Freezer etc.
(19). Window AC Split & Package AC description Advantage & application.
(20). Introduction about commercial plants.
(21). Automobile AC , Function of individual components. Refrigerants. used & retrofitting of old car/ mobile AC's.
Second semester
1. Non conventional Refrigeration System: -Thermo-Acoustic, Magnetic, Vortex-tube, Pulse-Tube Refrigeration & Lithium Bromide-Vapour Absorption System.
2. PTC & NTC function & applications, Rectifications in Single phase and three phase AC to DC, Variable Frequency Drive (VFD), Starters-DOL, Star Delta Starter, Inter locking.
3.IC's, PWM (Pulse Width Modular) controller, Micro processor, Micro controller, CRO.
4. Commercial used Compressors Digital Scroll Compressor. Centrifugal Compressor, Capacity control of commercially used compressor.
5. Commercial Used Condenser, Air cooled, Water cooled, Evaporative , Description, Types, Condenser Capacity.
6.Fibre Reinforced Plastic (FRP) Cooling Tower Description & Types construction Application, and Function Descaling Procedure Cooling tower capacity, terms etc.
7. Water Treatment Plant/Softening Plant pH value of wa‘er recycling regeneration, Description, Types, Construction, Function and Application.
8. Refrigerant Controls for Commercial Plants, Description, Types Liquld Expansion Valve, Electronic Expansion Valve, Level Master Control & Equalizer, Construction , Function & application.
9. Chilled Water System - DX and Flooded chiller.
10. Food preservation systems: - Cold storage, milk chilling, ice plant-pasteurizing , Description, Types, Construction, Function and Application.
11. Refrigerant and Lubrication Variable Refrigerant Flow System (VRF),with Micro controller controlling.
12. Cassette Type Systems, Inverter A/C's Ductable Package, Ceiling Suspended split A/C, Floor standing Type,, Panel A/C
13. Precision Air Conditioning System Comfort Air Conditioning System. Hospital Air Conditioning system and Description, Types, Condenser Capacity
14. Central Air Conditioning Plants Starting and stopping procedure of central air Conditioning plant
15. HVAC systems Different heating systems Calculating the tonnage of heating system.
16. Air Distribution System: Duct. Designing, material, classifications, applications and Fabrication Air filtering, classifications and applications Air outlels, fans and blowers Acoustic and air washer Application of clean rooms Air curtain. AHU and FCU.
17.Heat recovery wheel (HRW) for maintaining IAQ (Indoor Air Quality). CAV (constant air Volume) and VAV (variable Air Volume system ).
18. Psychrometry - Properties of air, Propagation of chart, processes, Relations, Different systems, Healing, Cooling, Humidifying, Dehumidifying
19. Cooling Load Calculation and Design of Air Conditioning Systems, Different Heat source and Heat load Bypass Factor
20. Errection. Commissioning. heat balancing and Evaluation (parameters of Controlling Device) of Central Air Conditioning System. System performance, Plant operation , Maintain Log Book, Preventive Maintenance of Commercial Plants, Trouble Shooting etc
21. Transport Air conditioning Introduction, Bus, Railway, Marine, Air craft Types Function, Construction, Types Capacity Application of Central Air Conditioning system
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