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PSYCHROMETRIC CHART BAROMETRIC PRESSURE 29.921 inches of Mercury Linric Company Psychrometric Chart, www.linric.com.1.2.3.4.5.6.7.8.9 1 1.1 1.2 1.3 VAPOR PRESSURE - INCHES OF MERCURY-20 0 10 20 25 30 35 40 45 50 55 60 65 70 75 80 85 DEW POINT - °F. Created Date:


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Psychrometric Properties using the Chart 7 Given: Moist air mixture in our classroom; T, T wb measured with a sling psychrometer. Find: The following psychrometric properties of the mixture using the Psychrometric Chart (a) relative humidity (b) humidity ratio (c) specific enthalpy (d) specific volume (e) dew point temperature T I h# Z T dp T wb v


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This guide is an easy 8 step framework designed to demystify the psychrometric chart: Step 1. Locate the dry bulb tem-perature along the bottom axis and the associated vertical line for each temperature. This scale will be in degrees F or degrees C. Step 2. Locate the 'humidity ratio' along the right vertical axis.


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Computer algorithms for psychrometric calculations have been published, and several microcomputer programs are available that incorporate psycrometric calculation. 11.5 PROCESSES ON THE PSYCHROMETRIC CHART Many HVAC processes can be represented as straight lines connecting two or three state points on the psychrometric chart.


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Fig. 8.27 Psychrometric chart . Title: Slide 1 Author: McGraw-Hill Created Date: 2/22/2008 9:21:43 AM


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For a 10,000 cubic feet per minute system, the weight of the air passing through is: 10,000 ÷ 14 = 714.3 pounds per minute. The weight of the moisture added is: 714.3 x 0.0099 = 7.07 pounds per minute of moisture. Since one gallon of water weighs 8.34 pounds, the moisture to be added is as follows:


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-20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 dry bulb temperature - °c 5 10 15 20 25 30 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 110


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Psychrometric charts are printed mostly for sea level atmospheric pressure. Since virtually all psychrometric air processes involving HVAC design occur within a 30o F and 120oF range, most psychrometric charts only show this range as a practical measure. Psychrometric properties are also available as data tables, equations, and slide rulers.


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The psychrometric chart conveys an amazing amount of information about air. It provides an invaluable aid in illustrating and diagnosing environmental problems such as why heated air can hold more moisture, and conversely, how allowing moist air to cool will result in condensation. To predict whether or not moisture condensation will


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Examine the psychrometric chart of Figure 386.3 and find the humidity ratio on the right hand side of the chart. Move horizontally to the right from the point that describes the conditions of the air and read the value. This psychrometric chart gives humidity ratio in pounds (lbs) of water per pound of dry air. For the conditions


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Psychrometrics 6.3 Table 2 Thermodynamic Properties of Moist Air at Standard Atmospheric Pressure, 101.325 kPa Temp., °C í Humidity Ratio,


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remains that the Psychrometric Chart can be difficult to comprehend. In order to provide a solution to this problem and enrich the user-experience of Climate Consultant 4.0, the authors created an audio and graphic tutorial application which explains the Psychrometric Chart and its relation to thermal conditions.


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horizontal in psychrometric chart • Zero SHF line - vertical on psychrometric chart - No Sensible heat • SHF = 0.75 to 0.8 common in Air conditioning practice - at normal dry climate. • A lower value of SHF such as 0.65 - implies a high latent heat load - common in a humid climate


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Summary. Description. Psychrometric chart (altitude 0, 750, 1500, 2250, 3000 m).pdf. English: Wet air data depicted in the standard representation (psychrometric chart). The diagram has been calculated by using formulas in "Psychrometric Data" from "ASABE standards" [ASAE D271.2 APR1979 (R2005)]. The altitude-atmospheric pressure relationship.


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HVAC - Heating, Ventilation, and Air conditioning. Psychrometrics -The behavior of mixtures of air and water vapor under varying conditions of heat. Enthalpy = Total heat in the air = Sensible plus Latent heat. Sensible Heat - Changes in temperature that do not alter the moisture content of air. Latent Heat - Related to level of.


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Adiabatic or Evaporative Cooling. a psychrometric process that involves the cooling of air without heat loss or gain. Sensible heat lost by the air is converted to latent heat in the added water vapor. 2. 1.