ASHRAE psychrometric chart no. 1 Normal temperature Sea...

ASHRAE psychrometric chart no. 1 Normal temperature Sea level Barometric pressure 101.325 kPa. Copyright 1992 American society of heating, refrigerating and air-conditioning engineers, inc. Enthalpy (h) kilojoules per kilogram dry air Saturation temperature (C) Dry bulb temperature (C) Humidity ratio (w) grams moisture per kilogram dry air Relative humidity Wet bulb temperature C Volume cubic metres per kilogram dry air Sensible heat / Total heat = ?Hs / ?Ht Enthalpy / Humidity ratio = ?h / ?W Prepared by: Center for applied thermodynamic studies, university of Idaho

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00:01 To find the maximum temperature and relative humidity on a psychrometric chart.

00:10 So we need to follow these steps.

00:12 So first we have to locate the point.

00:15 So first we need to locate the point representing the air condition.

00:21 Get the point representing the air condition.

00:27 Air condition is ac.

00:29 So on the psychrometric chart, on the psychrometric chart we will find the point representing the air condition for which we want to find the maximum temperature and relative humidity.

00:42 Okay.

00:42 Now the point is typically defined by two properties.

00:46 The first is the dry bulb temperature that is dbt, the dry bulb temperature and relative humidity are specific humidity.

00:58 So second is the relative humidity.

01:01 This two point is typically defined by these two properties.

01:05 Okay.

01:05 We will define it by these two properties.

01:07 Relative humidity means specific humidity.

01:10 You can also say r humidity ratio.

01:12 Okay.

01:13 So the dbt that the dry bulb temperature is the regular air temperature measured by a standard thermometer and this rh is the humidity ratio gives the amount of moisture in the air.

01:27 Now what we will do, we will move horizontally to the right along a constant dbt.

01:32 So we move horizontally to the right along a constant dbt.

01:41 Dbt line...

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