1/20/2024 0 Comments Dew point psychrometric chart![]() ![]() Psychrometric chart is a graphical representation of thermodynamic properties of air. > It is the pressure at which the air can have maximum water vapour for a given temperature. ![]() VP – Vapour pressure / partial pressure of water vapour (psi) > Pounds of water vapour per pound of air (OR) Specific humidity of air per specific humidity of saturated air.ĪH - Absolute humidity / humidity ratios / Specific humidity(lb/lb / gr/lb) (OR) Partial pressure of water vapour per equilibrium vapour pressure of water vapour at > Amount of water vapour per amount of saturated water vapour at a specified temperature Temperature at which humidity is 100% and air can not hold further water vapour. > Temperature at which the water vapour in the air condense in to water. > It is the thermodynamic temperature of air measured using a thermometer which is covered > It is the thermodynamic temperature of air measured using a thermometer freely exposed toĪtmosphere and shielded from radiation and moisture Resolve with Psychrometric chartīelow are the list of air properties we generally use in air conditioningįor simplicity consider there is no fresh air addition, AHU fan motor heat gain, and infiltration.Īlso a typical cooling and dehumidification process is considered in this example. Ĭlick here for Psychrometric calculator, computes psychrometric properties without chart and equations.Ĭlick here for Moisture content in air/Pychrometry, computes psychrometric properties without chart and equations. Psychrometric chart and related equations by Dasa. Study of Moisture content in air - Pychrometry Psychrometric chart and related equations Momentum equation in a 3D particle and its surface & body forcesĪir Pollution data-Telangana, Sanathnagar, HyderabadĪir Pollution data - Tamil Nadu Station: Alandur Bus Depot, Chennai - CPCB Law of Conservation of Momentum and Energyĭesign For Manufacturing and Assembly(DFMA) principles of Sheet Metal Work Law of Conservation of Mass and Continuity Equation Interception point of above two line will is used to calculate the other air properties.Apparatus dew point temperature (ADP) & By-pass factor (BF)Īir Handling Unit (AHU) performance calculationĬhilled water flows measurement using Orifice plate, Balancing valves, Manometers & Pitot tubes.Wet bulb temperature lines from that point. Then draw a inclined line parallel to the Find the wet bulb axis and 24 0C point.Then draw a vertical line from that point. Find the dry bulb axis and 28 0C point.Psychrometric chart where other air properties can be calculated? You have observed that temperatures areĢ8 0C and 24 0C for dry bulb and wet bulb respectively. You are given a psychrometer which canīe used to measure dry bulb temperature and wet bulb temperature. You are advised to find air properties from a psychrometric chart. We discuss few examples to understand how this process is done. Then these two lines will meet at one point. Wet bulb temperature and dry bulb temperature. When wet bulb temperature and dry bulb temperature are given, your first step is drawing correct lines of Identify a point on psychrometric chart when wet bulb temperature and dry bulb temperature are known Wet bulb lines for 10 0C, 20 0C, 30 0C in following figure. Wet bulb temperature lines are inclined lines. How to mark constant wet bulb temperatures on wet bulb axis? ![]()
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