Prelude to HVAC

✓ Fundamentals
✓ Modes of Heat Transfer
✓ Sensible Heat and Latent Heat

Basic Components of Air-Conditioning and
Refrigeration machines

✓ Basic Refrigeration System or Vapor
✓ Compression Cycle
✓ Pressure – Enthalpy Chart
✓ Function & Types of Compressor
✓ Function & Types of Condenser
✓ Function & Types of Expansion Valve
✓ Function & Types of Evaporator
✓ Accessories used in the System
✓ Refrigerant and Brines

Classification of Air-Conditioning Systems

✓ Window A/C
Working of Window A/C with Line Diagrams
✓ Split A/C
Types of Split A/C
Working of Split A/C with Line Diagrams
✓ Ductable Split A/C
Working of Ductable Split A/C with Line Diagrams
Variable Refrigerant Volume (VRV)/ Variable
Refrigerant Flow (VRF)
✓ Ductable Package A/C
Working of Ductable Package A/C with Line
Diagrams
Package Roof Top Units
Central Plant Chill Water System

Categories of Air Conditioning

✓ All air systems
✓ All water systems
✓ V Air – water system
✓ Direct Refrigerant system

Study of Psychrometric Charts

✓ Dry Bulb Temperature
✓ Wet Bulb Temperature
✓ Dew Point Temperature
✓ Relative Humidity
✓ Humidity Ratio

Processes

✓ Heating
✓ Cooling
✓ Cooling and Dehumidification
✓ Heating and Humidification
✓ Finding Values Using the Chart

Load Calculation

Survey of Building
Cooling Load Steps
Finding Temperature difference (AT) & ‘U’
Factor
✓ Wall, Glass, Roof, Partition
Finding the Ventilation Requirement for IAQ
Load Calculations (Manually using E-20 form)
ESHF, ADP & Air Flow Rate (CFM) Calculation

Air Distribution System

✓ Duct-Definition & Terminology
✓ Duct Design consideration
✓ Duct sizing methods
✓ Duct sizing as per Aspect Ratio
✓ Finding Duct size using Ductulator
✓ Calculation of Number of sheets for Duct
✓ Gauge selection for Sheet Metal ~ Bill of
Materials for Duct Network
✓ Legends and Symbols used in the HVAC
✓ Industry
✓ Selection of Diffusers and Grilles
✓ Duct Materials and Insulation materials used in
HVAC Industry
✓ Study of Overseas Drawings
✓ Duct Routing – Preparation of a line diagram
(SLD)
✓ Preparation of Layouts Double line Diagram –
✓ DLD) as per SMACNA rules
✓ Openings for Ducts passing through the Wall
✓ Sectional drawing @, Duct supports
✓ Concept of CAV & VAV

Static Pressure Calculation

✓ Selection of Motor HP
✓ Selection Fan/Blower RPM