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Psychrometrics & Air Conditioning Design Kalyan Chatterjea
Introduction to Comfort  Air-conditioning
Introduction - Psychrometry ,[object Object],[object Object],A psychrometric chart presents physical and  thermal properties of moist air in a graphical form.
Psychrometry – Dry Bulb Temp ,[object Object]
Psychrometry – Wet Bulb Temp ,[object Object],[object Object]
Psychrometry – Saturation Line ,[object Object],[object Object]
Psychrometry – Relative Humidity ,[object Object],[object Object],Sensible heat removal with increase in RH
Psychrometry – Specific Volume ,[object Object],[object Object]
Psychrometry - Enthalpy ,[object Object],[object Object]
Psychrometry – Sensible Heat Processes ,[object Object],[object Object]
Psychrometry - Dehumidification ,[object Object],[object Object]
Psychrometry – Comfort Zone ,[object Object]
[object Object],[object Object],Psychrometry – Comfort Zone
Psychrometry – Climate Classification ,[object Object]
Psychrometry – Heating at Sea ,[object Object],Sensible heat addition with decrease in RH…away from comfort zone
Psychrometry – Heating at Sea ,[object Object],Heat addition with humidification resulting in more comfortable RH
Heating Process in Detail ,[object Object]
Heating Process in Detail ,[object Object],h-values can be directly read from the psychrometric chart
[object Object],[object Object],Cooling & Dehumidification in Detail
Cooling & Dehumidification in Detail ,[object Object],Mass flow balance equation for the water & steam  In practice, water mass flow is very small compared to  air mass flow. So a simpler equation could be used without undue error.
References ,[object Object],[object Object]
References
References ,[object Object],[object Object]
References
References ,[object Object],[object Object]
References
References ,[object Object],[object Object]
References
References ,[object Object],[object Object]
References
References ,[object Object],[object Object],TEST - a visual platform to analyze thermo-fluids problems, verify hand calculations, pursue what-if scenarios, visualize thermal systems, and engage in a life-long journey to master thermodynamics.  Developed by Dr. S. Bhattacharjee, San Diego State University.
References
References ,[object Object],[object Object]
References
References ,[object Object],[object Object],[object Object]
References
Thank You!

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Psychrometrics