HVAC Design - MEP Dubai

Course details

1. INTRODUCTION TO HVAC

• Fundamentals of Heating, Ventilation and Air conditioning.
  
• Basic refrigeration system or refrigeration cycle.
  
• Details of Compressor, condenser, Evaporator and Expansion devices.
  
• Types of heat transfer.
  
• Sensible Heat, Latent Heat.
  
• Psychometric chart and usage of psychometric ; 
  
• Dry bulb temperature, wet bulb temperature, dew point temperature
  
• Relative humidity, sensible heat ratios.

2. AIRCONDITIONING SYSTEM

• Classification of Air conditioning systems.
  
• Direct Expansion and Chilled water systems.
  
• Window type air conditioners, Split type Air conditioners, Centralised air conditioners, Variable Refrigerant volume (VRV) systems.
  
• Chilled water Fan coil units (FCU), Air Handling units (AHUs) and Fresh air handling Units (FAHUs).
  
• Chillers, condensing units, district cooling plants.
  
• Refrigerants.
  
• Local authority guide lines and LEED recommendations in HVAC Design.

3. DESIGN OF AIRCONDITIONING

• Details of Space load and Load factors.
  
• Thumb rules for heat load estimation.
  
• HVAC Standards units and conversion Factors.
  
• Heat Load calculation Manual E20 calculation, excel software. 
• HAP software (software shall be provided to students).
  
• Equipment ;
  
• Manufactures data for Equipment selections with reference to the calculated cooling load.
  
• External Static Pressure and motor selection.
  
• Acoustics and noise levels.
  
• COP and EER values.
  
• U-Value ;
  
• Thermal Load summary sheet, window schedule, u value calculation sheet preparations for Dubai Municipality.
  
• Sample HAP calculations.

4. VENTILATION SYSTEMS

• Fresh air and Exhaust air calculations
  
• Smoke ventilation systems for low rise, midrise, high rise and super high rise buildings.
  
• Staircase pressurisation systems
  
• Car park ventilation system
  
• Kitchen exhaust system
  
• Selection of Fresh air handling units (with and without thermal heat wheel)
  
• Selection of Smoke ventilation fans and car park exhaust fans. 
  
• Selection of Ecology units.
  
• Example calculations and selections.

5. DUCT DESIGN

• Duct designing - Equal friction Method and Equal velocity ;
  
• Duct Aspect ratio and duct sizing.
  
• Duct Materials selection and gauges selection.
  
• Classification of Low, Medium and high pressure ducts.
  
• McQuay duct sizer software.
  
• Sample duct designing.
  
• Detailed ESP Calculation.

6. DUCT ACCESSORIES

• Selection of Grilles and Diffusers - Velocity, pressure drop and throw.
  
• Volume control Dampers , Motorised dampers and Variable Air Volume
  
• Fire Dampers, Motorised Fire Dampers and Smoke Fire dampers - Applications as per Dubai Civil Defence.
  
• Acoustic lining and thermal insulation details.
  
• Selection of Sand trap louvers, Gravity louvers.
  
• Example selection from Catalogues.

7. CHILLED WATER SYSTEMS

• Selection of Chillers and types of Chillers.
  
• Primary Chilled water pump and secondary chilled water pumps working and selection.
  
• Chilled water Pump Head calculation.
  
• Chilled water pipe sizing.
  
• McQuay Pipe sizing software and usage.
  
• Selection of Heat Exchangers.

8. CHILLED WATER PIPING ACCESSORIES

• Chilled water pipes and fittings material selections.
  
• Chilled water Pipe insulation and cladding details.
  
• Chilled water valves - 2 way Valves, 3 way valves, Butter fly valves, Gate valves, Double regulating valves, thermostats, pressure gauges, test points, strainers, nonreturn valves, Pressure independent control valves and air vents.

9. ENGINEERING  

• Standard shop drawing legends and line types.
  
• Air balancing Methods & Chilled water balancing.
  
• Operational and Maintenance of HVAC ;  

10. REFERENCES 

• Standards -ASHRAE Handbook for Heating, ventilation and air-conditioning systems and equipments, Carrier Design Handbooks, ASHRAE , Dubai Municipality Regulations, Green Building Regulations, and Dubai Civil defence Regulations.
  
• Softwares - Carrier Hap / , McQuay pipe sizer, McQuay Duct Sizer, ASHRAE Duct Fitting Database.