NPTEL Syllabus
Air Conditioning and Ventilation Web course COURSE OUTLINE 1. Fundamentals - Air properties, psychometry, processes, and summer and winter air conditioning.
2. Comfort - Concept of human comfort and thermal response, comfort factors and environmental indices, IAQ. 3. Equipment analysis and selection - Filter, fan, Air washer, cooling tower and cooling and dehumidifying coil. 4. Load estimation - Heat and mass Transfer in wall, insulation, vapour barrier, and cooling and heating load calculations. 5. Air distribution - Air flow in duct, duct sizing and space air diffusion. 6. Ventilation - methods, applications in industries, exhaust systems and design.
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http://nptel.iitm.ac.in
Mechanical Engineering Additional Reading: 1. ASHRAE Handbook – HVAC Applications, American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc., Atlanta, USA, 2007. 2. ASHRAE Handbook – HVAC Systems and Equiplents, American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc., Atlanta, USA, 2008.
COURSE DETAIL
S.No
NPTEL
basic
Topics and contents
Number of Lectures
In tro d u c tio n - Purpose, applications, definition and components of air conditioning - Need and methods of ventilation - Course outline.
1
Psychrometry - Evolution of air properties and psychrometric chart - Basic processes s u c h as sensible heating/cooling, humidification/dehumidification and their combinations, steam and adiabatic humidification, adiabatic mixing, etc. Bypass factor and Sensible heat ratio.
3
Summer and Winter AC - Simple summer AC process, Room sensible heat factor, Coil sensible heat factor, ADP - Precision AC Winter AC. Human Comfort - Heat transfer from body, convection, radiation, conduction, evaporation, clothing resistance, activity level - Concept of human comfort - Thermal response - comfort factors - Environmental indices - Indoor air quality. AC Equipments - Filters, types, efficiency Fans basic equations, parallel and series configurations - Air washer, adiabatic,
3. Haines, W.R. and Wilson, C.L., HVAC Systems Design Handbook, McGraw Hill, 2nd Ed., New Delhi, 1994. 4. Legg, R.C., Air Conditioning Systems Design, Commissioning and maintenance, Batsford Ltd, London 1991. 5. Abrams, D. W., Low Energy Cooling – A guide to the practical application of passive cooling and cooling energy conservation measures, Van Nostrand Reinhold Company, New York, 1985. 6. McQuiston, F.C., Parker, J.D. and Spitler, J.D. Heating, Ventilating and Air Conditioning, John Wiley & Sons Inc., 2001. Hyperlinks:
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1. http://www.nptel.iitm.ac.in/courses/Webcoursecontents/IIT Kharagpur/Ref and Air Cond/New_index1.html 2. http://www.nptel.iitm.ac.in/video.php? courseId=1025
4 Coordinators: Prof. M. Prakash Maiya Department of Mechanical EngineeringIIT Madras 5
heated and cooled - Cooling tower, enthalpy potential, types, tower efficiency, NTU and characteristics, sizing and off design performance - Cooling and dehumidifying coil, dry and wet, sizing, performance. 6
Heat Transfer - Heat transfer in wall and roof, sol-air temperature, insulation, cooling load temperature difference - Fenestration, types of glass, sun shade, shading coefficient, maximum radiation, cooling load factor.
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7
Cooling Load Estimation - Design conditions, outdoor, indoor - External load, wall, roof, glass - Internal load, occupancy, lighting, equipments - Ventilation, air quantity, loads - Load estimation methods.
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8
Heating load estimation - Vapour transfer in wall, vapour barrier, load estimation basics.
2
9
Air Distribution - Ducts, types, fittings, air flow, friction chart, methods of sizing, balancing.
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10
Air Diffusion - Isothermal jet, throw, drop, types of outlets, ADPI, outlet/inlet selection.
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11
Basics of Ventilation - Need, threshold limits of contaminants, estimation of ventilation rates, decay equation, air flow round buildings.
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12
Methods of Ventilation - Natural, wind effect, stack effect, combined effect Mechanical, forced, exhaust, combined Displacement ventilation
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13
Industrial Ventilation - Steel plants, car parks, plant rooms, mines, etc.
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14
Ventilation System Design - Exhaust ducts, filters, blowers, hoods, chimney, etc.
4
Total number of lectures
43
References: 1. ASHRAE Handbook - Fundamentals, American Society of Heating, Refrigerating and Air - Conditioning Engineers Inc., Atlanta, USA, 2009. 2. Threlkeld, J.L., Thermal Environmental Engineering, Prentice Hall, New Jersey, 1962. 3. Croome, D.J. and Roberts, B.M., Air conditioning and
ventilation of buildings, Pergamon. 4. Stoecker, W.F., and Jones, J.W., Refrigeration and Air Conditioning, 2nd Edition, Tata McGraw Hill, New Delhi 1982. 5. Arora, C.P., Refrigeration and Air Conditioning, Tata-McGrawHill, New Delhi, 2003.
A joint venture by IISc and IITs, funded by MHRD, Govt of India
http://nptel.iitm.ac.in
