Wet Bulb Dry Bulb Psychrometric Chart

Altitude above sea level m.

Wet bulb dry bulb psychrometric chart.

Dry bulb temperature and 57 c wet bulb temperature experiences a temperature drop of 3 c as it passes through the 1 2 m wide stack of lumber. Enter dry bulb temperature plus either wet bulb temp rh or dewpoint temp. By combining the dry bulb and wet bulb temperature in a psychrometric chart or mollier diagram the state of the humid air. The higher its dew point temperature.

A process in which there is no change of dry bulb temperature. The psychrometric chart gives the relative humidity for a given wet bulb and dry bulb temperature. The relative humidity is approximately 50 the humidity ratio is approximately 65 grains h2o lb dry air. Dry bulb temperature is located on the horizontal or x axis of the psychrometric chart and lines of constant temperature are represented by vertical chart lines.

Dry bulb temp c. The temperature read directly on an ordinary thermometer. Relative humidity temperature in. Wet bulb temp c.

The wet bulb temperature is the temperature of an object that can be achieved through evaporative cooling assuming good air flow and that the ambient air temperature remains the same. Two independent intensive properties are required to completely specify the state of air in the psychrometric chart. Determine the properties of the air at state point 2 and compare them with those at state point 1. By definition wet bulb temperature is the lowest temperature a portion of air can acquire by evaporative cooling only.

Since this temperature is so commonly used assume that temperatures are dry bulb temperatures unless otherwise designated. Example the state of air in the psychrometric chart. Dry wet bulb temperature axis on psychrometric chart. It includes a dry bulb thermometer a wet bulb thermometer and a psychrometric chart a graph that plots the relationships between the dry and wet bulb temperature relative humidity and dew point at constant pressure.

Now we are going to learn two of those axis dry bulb temperature and wet bulb temperature. When we know dry bulb temperature and wet bulb temperature. When dry bulb and wet bulb temperatures of the air are known the dew point temperature can be plotted on the psychrometric chart fig. Relative humidity dewpoint temp c.

The state of air with dry bulb temperature 75 o f and wet bulb temperature 62 5 o f can be visualized in the psychrometric chart as indicated below. Psychrometric chart includes so many axis which represent different parameters of air.