Refrigeration and psychrometric charts with property tables pdf

Tables of the thermodynamic properties of DuPont™ Freon NIST Standard Reference Database 23, NIST thermodynamic and transport properties of refriger-ants and refrigerant mixtures - REFPROP version 6.01, Stan-dard Reference Data Program, National Institute of Standards and Technology, 1998). Table 2 DuPont™ Freon® 12 Psychrometric Properties The Psychrometric Chart Chart No. 1 is available on the BbLearn website! 5 Wet Bulb and Dry Bulb Temperatures Wet bulb and dry bulb temperatures are thermodynamic properties of the moist air mixture. They are measured with a device known as a psychrometer. 6 Psychrometric Properties using the Chart 7 THE PSYCHROMETRIC CALCULATOR By: Stanley F. Gallos, The Bastian-Blessing Company INTRODUCTION Problems involving changes in temperature, humidity, and other properties of air can be solved by any of three methods. The three methods are psychrometric tables, psychrometric charts, and the psychrometric calculator. Refrigeration Tables With Charts Si Units the halocarbon standard for SI tables. The following property tables are included: Table A-1 — Saturation Properties of Ammonia — IP Units using REFPROP (Version 7.0) with -40°F zero datums for saturated liquid entropy and enthalpy. Inch-pound units. Table A-2 — Superheated Vapor Properties of Ammonia — This point is located on psychrometric chart as indicated below and the values of specific humidity, relative humidity, enthalpy and dew point temperature are as under. Specific humidity = 10.75 g/kg dry air Relative humidity = 40 % Enthalpy = 57.5 kJ/kg dry air Dew point temperature = 15 oC Use of steam table From steam tables (will be provided in AMIE exam hall on request), the partial pressure of water vapour corresponding to DP temperature 140C is 0.015973 bar. Atmospheric pressure is 758 mm Hg (758 x 0.001332 = 1.0105656 bar). Humidity ratio Humidity ratio will be 0.6229 0.6229(0.015873) 0.01605 ( ) (1.0105656 0.015973) v v p w pp Psychrometric Chart and Air Characteristics. A psychrometric chart presents physical and thermal properties of moist air in a graphical form. It can be very helpful in troubleshooting and finding solutions to greenhouse or livestock building environmental problems. Understanding psychrometric charts can help you visualize environmental control Table of Contents Introduction Psychrometric Chart and Tables R-729 Air Lithium Bromide and Ammonia-Water Solutions R-717 Ammonia (NH3) R-744 Carbon Dioxide R-11 Freon-11 R-12 Freon-12 R-22 Freon-22 R-502 Azeotrope R-13A Tetrafluorothane Get A Copy 85 Water vapour Properties of Moist Air M v = 18.016 R v = 0.461 kJ/kg. K 18.016 8.3143 where subscript v refers to water vapour. 6.3 PSYCHROMETRIC PROPERTIES The properties of moist air are called psychrometric properties and the subject which deals with the behaviour of moist air is known as psychrometry. Moist air is a mixture of dry air and water vapour. Heating and Humidifying> a psychrometric process that involves the simultaneous increase in both the dry bulb temperature and humidityratio of the air. Cooling and Dehumidifying> a psychrometric process that involves the removal of water from the air as the air temperature falls below the dew‐ point temperature. Adiabatic or Evaporative Cooling> Titus Timeout Podcast - How to Read a Psychrometric Chart Learn Pivot Ta