Heating Ventilation Air Conditioning

For every international quality buildings such as Hospitals, Star Hotels, Shopping Malls, Universities and high rise buildings required central Air Conditioning.

The Design of the HVAC is normally customized according to the project nature,locality, climate conditions etc. Heating system shall be designed for winter season where heavy winter occurs and cooling systems shall be designed for hot summer areas in consideration to the ventilation and fresh air requirement to the inhabitance according to the ASHRAE (American Standards for Heating & Refrigeration Air conditioning Engineers) standards. For human comfort rather than the temperature level, relative humidity ratio also a vital fact. The sensing and the excavations of poisonous gases from the areas like car parking, smoke and fire evacuation in case of fire at buildings are also part of HVAC. The above course covers complete design of HVAC system with practical in live projects.

HVAC COURSE SYLLABUS

(Heating Ventilation & Air conditioning)

FUNDAMENTALS

  • Overview of the HVAC system
  • Recall the fundamentals of Physics & Psychometric
  • Various types of HVAC systems commonly using
  • Functioning & components of a refrigeration system

APPLICATIONS

  • Selection criteria of suitable HVAC system for a commercial building
  • Introduction & components of central air conditioning system
  • Study and analysis of airflow
  • Area calculation, Velocity, Aiflow etc

DUCT SYSTEM

Duct design using manual formula as per ASHRAE

Duct design using MEDAC software

Duct design using Mcquay software

Duct design using ductulator / duct sizer

  •  Equal friction , Constant Velocity & Static regain methods
  •  Conversion of hydraulic diameter to rectangular ducts
  •  Selection of air outlets (Grilles and diffusers)
  •  Louvres,Sand trap louvers,fire damper,Fire/smoke damper etc
  •  Door louvre,door undercuts
  •  Volume Control damper, Splitter dampers
  •  Duct layout drafting standards as per SMACNA
  •  Air balancing
  •  Exhaust air calculation

MATERIALS

  • Material selection for duct work
  • Duct construction standards as per SMACNA
  • Gauges, thickness & weight of duct material
  • Calculation of duct quantity
  • Duct fabrication procedures

EQUIPMENTS

  • Air Handling Units (AHU)
  • Package Units
  • Split A/Cs
  • Window A/C
  • Overview of district cooling system

AIR BALANCING & RETURN AIR

  • Common return over ceiling
  • Bell Mouth Opening
  • Concept of return air wall opening
  • Fresh air intake (%)

SHOP DRAWING PREPARATION

  • Prepare architectural drawing
  • Use proper layer and colour management
  • Insert structural beam
  • Insert lights,speakers,smoke detectors and sprinklers
  • Locate diffusers as per ceiling type
  • Finalize the best route
  • Design the ducts and start duct layout in double line
  • Apply SMACNA standard for drawing to the equal reducer,one side reducer,take
  • Apply fire dampers, Volume dampers, Louvres, Splitter dampers etc

DUCT CONSTRUCTION AND SELECTION OF MATERIAL

  • Sheet metal standards as per SMACNA
  • Duct construction schedule-gauge,thickness,weight etc
  • Duct weight calculation
  • Selection criteria of gauges
  • Schedule according to pressure classification
  • Practical presentation of duct longitudinal connection
  • Construction schedule from SMANCA handbook
  • Drive slip,S-Sleeve,Standing S,Reinforced S etc
  • Slide on flange and companion angle
  • Duct support standards. Schedule of hanging and selection of threaded rod and Angle
  • off,splitter etc
  • Door louvre and door undercut

SYSTEMS CORDINATION

  • Duct offsets & SMACNA formula
  • Splitter construction and formula
  • Assign levels to the ducts
  • Allow space for other E&M services

HEAT LOAD CALCULATION

Calculate airflow, cooling load, Heating load, humidification, Heat recovery, Economizer etc.

  • Area calculation
  • Wall and window properties
  • Solar emission
  • Dry bulb & Wet bulb temperature
  • U-Value calculation of wall,window,Roof etc
  • Fresh air requirement for various utilities
  • Equipment, Lighting watts
  • People density and heat discharge
  • Load calculation
  • Ventilation air
  • Selection of equipment
  • Humidifier calculation
  • De-humidification Calculation
  • Pre-heat coil
  • Heat recovery system
  • Economizer or ventilation reclaim system

PSHYCHOMETRY

  • Analysis of psychometric chart
  • Sensible and latent heat
  • Relative humidity
  • Properties of air
  • Temperature and unit conversions

TYPES OF CENTRAL AIR CONDITIONING SYSTEMS

– CAV SYSTEM

– VAV SYSTEM

– FCU SYSTEM

– DX-split unit system

– Package unit system

– Chilled Water Air Handling Units System

 

A. Merits  of each system

1.Individual control – VAV,FCU

2.Effective running cost – VAV

3.No mixing of air – FCU

LIFE SAFETY BY AIR UTILITIES

– Staircase pressurization

– Kitchen ventilation & make up system

– Car parking exhaust

– Hospital comfort air circulation

STATIC PRESSURE CALCULATION

  • Static pressure calculation of AHU fans and exhaust fans by manual & software

CHILLED WATER SYSTEM

  • Chiller capacity calculation
  • Chilled water delta-T
  • Selection, Ordering and installation procedures of chillers
  • Design of chilled water piping- Supply and Return (Software and manual)
  • Solenoid valves and controls
  • Valves and accessories – DRV, GV, STR
  • Chilled water piping drawing
  • Chiller compound design

PUMPS

-Total pump flow and selection methods of chilled water pumps

-Pump head calculation

-Selection of pumps from catalogue

-Shop drawing preparation of chilled water pumps

HEATING SYSTEM

->Electric heater – Design & selection

->Heating coil system – Concept and design

HUMIDIFIER

  • Electric steam humidifier
  • Steam humidifier by direct steam supply
  • Steam piping design
  • Condensate piping design

STANDARD DETAILS 

  • Duct hanger details
  • Duct construction details
  • Duct joining details
  • Insulation & installation details
  • Vertical duct support details
  • AHU installation details
  • Exhaust fan, Fresh air fan, FCU installation details
  • Grilles and diffusers, Plenum boxes installation details
  • Fire / Volume dampers details

ROOF DUCTING 

  • Roof duct distribution
  • Roof equipment installation (AHU, Exhaust fan, SF etc)
  • Sand Trap Louvres, Aluminium filters, Fresh air louvres
  • Roof mechanical systems supporting system
  • Exhaust fan and fresh air fan installation system
  • Equipment schedules

BUILDER’S WORK

  • Structural coordination of duct system
  • Concrete pad for equipments
  • Slab openings for duct risers
  • Equipment weights

CONTROL DIAGRAMS

  • AHU, Chiller, FCU control line diagrams
  • Mode of operations
  • BMS & Automation Overview

BOQ & SPECIFICATION

  • Bill of Quantities
  • Costing and budget
  • Project specification

 Course Duration: 2 Months + 1 Month Gulf Live Project Training (Regular), 1 Month (Fast Track)