Psychrometric charts are complex graphs that can be used to assess the physical and thermodynamic properties of gas-vapour mixtures at a constant pressure. They are often used to assess the properties of moist air.

What are the 6 psychometric process?

This is the series of articles that describes psychrometric chart and various psychrometric processes like sensible heating, sensible cooling, humidification, de-dumidification, evaporative cooling etc.

How is psychrometric chart calculated?

Take a ruler and draw a vertical line at the dry bulb temperature of 70 and draw a horizontal line where the dew point is 50. The point where these two lines intersect is known as a ‘state point’. Plot the state point and you can also read the rel- ative humidity, wet bulb, enthalpy, vapor pressure and humidity ratio.

What is psychrometric chart Slideshare?

Psychrometric chart description O Vertical lines are dry-bulb temperature O Horizontal lines are humidity ratio (right axis) or dew point temp (left axis) O Slanted lines are wet-bulb temp and enthalpy O Specific volume are the “other” slanted lines.

What is a psychrometric process?

a psychrometric process that involves the increase or decrease in the temperature of air without changing its humidity ratio. Example: passing moist air over a room space heater and of kiln air over the heating coils.

What is psychrometric process and explain various psychrometric terms?

Psychrometry is the science of studying thermodynamic properties of moist air and the use of these to analyze humid air conditions and processes. Air conditioning processes can be determined with psychrometric charts and Mollier diagrams. Common properties in the charts includes. dry-bulb temperature.

What is the application of psychrometric chart?

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.

What does psychrometer mean in science terms?

The psychrometer (q.v.) is a hygrometer that utilizes two thermometers—one wet-bulb and one dry-bulb—to determine humidity through evaporation. A wetted cloth wraps the wet-bulb thermometer at its enlarged end.

What does the vertical line mean on a psychrometric chart?

Psychrometric chart description O Vertical lines are dry-bulb temperature O Horizontal lines are humidity ratio (right axis) or dew point temp (left axis) O Slanted lines are wet-bulb temp and enthalpy O Specific volume are the “other” slanted lines 31.

How to use a psychrometric chart to measure air temperature?

With psychrometric chart we can easily find out the present and the final condition of the air. Say if the air is cooled from 100°F to 75°F, all we have to do is to draw the horizontal line to locate the initial and final condition of the air. 3.

What are the basic parameters of psychrometry?

1. Psychrometry It is the study of the properties of Moist Air or a mixture of dry air and water vapor. Fundamental Parameters: 1. TOTAL PRESSURE P = Pa + Pv KPa 2. VAPOR PRESSURE Pv = Pw − PA (t d − t w ) KPa where A = 6.66 x 10 −4 → For tw equal or greater than 0°C A = 5.94 x 10 −4 → For tw equal or less than 0°C

What are the 14 psychrometric processes?

14. PSYCHROMETRIC PROCESSES  SENSIBLE HEATING  SENSIBLE COOLING  DEHUMIDIFICATION  HUMIDFIYING  ADIABATIC COOLING  ADIABATIC MIXING (MOIST AIR & WATER VAPOR) 15. Psychrometric Processes or Air conditioning Processes 1.