HEATING VENTILATION & AIR CONDITIONING Design is a sub discipline of mechanical
engineering that deals with the art of heating- air conditioning and ventilation systems of the building to
achieve comfort.. The scientific design of HVAC system is critical to achieve an efficient and effective
environmental control system within a liveable. The successful integration of building constraints- air
movement conditions and equipment selection can positively impact system overall performance and
decrease utility expenses and capital expenditures.To achieve the optimal design- one should need good
analytical skills and up-to-date technical knowledge in the subject.
Comfort is a state of mind and is our profession.
We follow : ASHRAE®- SMACNA®- ISHRAE®
Role of an HVAC design engineer
Intro to HVAC- Applications- Human comfort range- Modes of heat transfer- Types of heat-
Psychrometry- Refrigerants and refrigeration cycles- Pressure enthalpy diagrams- types of air
conditioning systems- Understanding the codes and standards.
Kitchen ventilation system design- Kitchen ventilation system principles-types-design-document
Toilet ventilation system design: Non centralized ventilation system principle & design-
Centralized ventilation system principle & design.
Car parking ventilation system: Non-centralized system principle & design-Centralized system
principle & design- Unducted centrifugal and jet fans.
Softwares complying to the codes- Fundamentals of heating and air conditioning- Building
survey- Outside and room design conditions- Space envelope and U factor calculation- Fresh air
requirements- Factors of heat gain/ loss- Calculation of Tr- ADP- ESHF- Air flow rate- Heating
Heating and cooling load estimate: Carrier E20 manual method - Carrier e20 II method (HAP
Duct system: Air system sizing- Ducting terminology- Design parameters- Duct routing-Duct
sizing by Velocity reduction method- Equal friction method- Static regain method.
ESP/Static pressure calculation (fan selection)- Fan laws- Backward and forward curved fans- Air
change number per hour- Static and velocity pressure- Duct fitting coefficients- Fan selection
curves- Brake horse power of fan.
Air terminals:Diffuser-Grill-Register-Louvre principles and selection.
Dampers : Fire dampers- VCD principle and selection.
Measuring devices- Pressure gauge & thermometer.
Non centralized AC systems- Window AC- Package AC.
Centralized AC systems: Package AC system design- VRF system- Ducted split AC- Chilled water system.
Chilled water system: Chiller principle & selection- Hydronic pipe sizing (manual and McQuay method)-Primary secondary piping system-Hydronic pump selection-Actuator valves-Cooling tower selection and performance-Condenser pipe system design-Condenser pump selection-Expansion tanks principle & design-Chemical Dosing.
Pump system design: Head calculations- Pump laws-Open and closed loop systems-Equivalent pipe length for valves and fittings-VFD enabled pumps- Primary secondary pumping systems.
Boiler system design- Boiler capacity- Energy consumption- Pipe sizing- Pipe materials and insulation.
VRV® or VRF system design- VRF system sizing -Two pipe and three pipe systems- Outdoor unit capacity- pipe sizing- VRV in ASHRAE- Variable water volume.