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MODULE CONTENT
UNIT 1: COOLING LOAD AND DESGN OF AR-CONDITIONING SYSTEMS
Introduction, Sensible Heat Gain through Building Structure by conduction, Sol Air Temperature, Solar Heat Gain through Glass Areas, Heat Gain due to ventilation, Heat Gain from Occupants, FANS, Types of Fans, Centrifugal Fans, Axial Flow Fans, Total pressure Developed by a Fan, Fan Air Power, FAN EFFICIECIES, Chillers, Pumps and Piping, Diffusers and Grilles, Cooling Coils and Heating Coils, Air-Conditioning Filters, Window Air-Conditioner, Packaged Air-Conditioners, Spilt Air-Conditioning Units, Cooling Towers, Classification of Cooling Towers Cooling Towers
UNIT 2 SELECTIONS OF AIR CONDITIONING SYSTEMS
Introduction to thermal distribution systems and their functions, Selection criteria for air conditioning systems, Classification of air conditioning systems, Working principle, advantages, disadvantages and applications of all air systems, namely: a) Single duct, constant volume, single zone systems b) Single duct, constant volume, multiple zone systems) c) Single duct, variable air volume (VAV) systems d) Dual duct, constant volume and variable volume systems e) Outdoor air control in all air systems f) Advantages of all air systems g) Disadvantages of all air systems (Section h) Applications of all air systems ,Working principle, advantages, disadvantages and applications of all water systems) , Working principle, advantages, disadvantages and applications of air- water systems (Section, Working principle, advantages, disadvantages and applications of unitary refrigerant based systems
UNIT 3: TRANSMISSION OF AIR IN AIR CONDITIONING DUCTS
Describe an Air Handling Unit (AHU) and its functions ,Discuss the need for studying transmission aspects of air in air conditioning ,Discuss airflow through air conditioning ducts, Bernoulli and modified Bernoulli equations, Static, dynamic, datum and total head, Fan Total Pressure (FTP) and power input to fan ,Discuss estimation of pressure loss through air conditioning ducts , Estimation of frictional pressure drop of circular and rectangular ducts using friction charts and equations , Estimation of dynamic pressure drop in various types of fittings ,Static regain
UNIT 4: DESIGN OF AIR CONDITIONING DUCTS
Important requirements of an air conditioning duct , General rules for duct design ,Classification of duct systems ,Commonly used duct design methods , Principle of velocity method ,Principle of equal friction method , Principle of static regains method , Performance of duct systems ,System balancing and optimization , Introduction to fans and fan laws ,Interaction between fan and duct system
UNIT 5: SPACE AIR DISTRIBUTION
Requirements of a proper air distribution system, definition of Air Distribution Performance Index andSpace Diffusion Effectiveness Factor , Design of air distribution systems, buoyancy effects anddeflection of air jets , Behaviour of free-stream jets, definitions of drop, throw, spread and entrainment ratio , Behaviour of circular jets ,Behaviour of rectangular jets , Characteristics of different types of air distribution devices, such as grilles, registers, ceiling diffusers, slotted diffusers etc, Return air inlets , Airflow pattern inside conditioned spaces using different types of air distribution devices ,Stratified mixing flow , Cold air distribution , Displacement flow , Spot cooling/heating ,Selection criteria for supply air inlets
UNIT 6: VENTILATION FOR COOLING
Discuss the use of ventilated air for cooling of buildings and cooling of occupants, Make a comparison between natural ventilation and mechanical ventilation, Discuss characteristics of natural ventilation and estimation of airflow rate due to wind and stack effects, List the general guidelines for natural ventilation , Discuss briefly forced ventilation using electric fans , Discuss interior air movement using interior fans, unit ventilators, whole house fans and solar chimneys