Mollier Diagram Relative Humidity

The Mollier diagram is a graphical representation of 3 components. The curved lines in the diagram represent the relative humidity of air.

Psychrometric Chart Explained Psychrometric Chart Refrigeration And Air Conditioning Hvac Infographic

The underlying psychrometric parameter data for the psychrometric chart and the Mollier diagram are identical.

Mollier diagram relative humidity. The actual water content of the air measured in g waterkg air. Secondly the water content of air. The curved lines in the diagram represent the relative humidity of air.

The relative humidity is the proportion of actual water vapour pressure in the air expressed as a percentage of the water vapour pressure at saturation. What is a psychrometric chart or Mollier Diagram. The Mollier Chart also called enthalpy entropie chart the h-s chart or called the psychrometric chart is a chart devised by Richard Mollier in 1904 that expands the enthalpy against entropy.

100 relative humidity in the air the air is at the saturation line. The 100 humidity line is also called the saturation line. 50RH will therefore be represented by the line.

As we mentioned above air can hold a fixed amount of water vapour. Active 3 months ago. Relative humidity is the ratio of existing water vapour in the air to the maximum possible amount of vapour the air could potentially contain.

It is used to calculate heat loads for air handling systems for example. Curves of constant relative humidity. The intersection of the constant enthalpy line with the isotherm responding to the temperature of air gives the humidity of air.

Transform between Mollier diagram and psychrometric chart. The IXHX or psychrometric diagram the Mollier diagram is one of the most useful tools when designing an air humidifying system. Water content x The horizontal light blue axis at the bottom.

1 m 3 of air at 25 o C and 90 relative humidity C is mixed with 1 m 3 air at. The Mollier diagram is a variant of the psychrometric chart. Relative humidity is the water vapour concentration expressed as a percentage or a fraction to be pedantic of the maximum possible water vapour concentration.

At the Thermodynamics Conference in Los Angeles 1923 it was decided to name the diagram after Richard Mollier in his honor. Based on the information above and the Mollier diagram - the relative humidity in the mixing point can be estimated to approximately 80. The Mixing Point is below the Saturation Line.

Relative humidity RH The green curved lines. This diagram is widely used in mechanical engineering and HVAC technology and plots the Temperature versus the Absolute Humidity. The maximum relative humidity is 100 meaning the air is completely saturated.

5 See Reference 10. The Mollier Diagram illustrates this clearly. Firstly the enthalpy H as illustrated in Heat-content.

Ask Question Asked 3 months ago. As we mentioned above air can hold a fixed amount of water vapour. The chart is is combined with the Relative Humidity lines and the Enthalpy to calculate the change in total internal energy.

In the Mollier diagram to be read in the example below the enthalpy is shown in hkJ kg. In practical calculations the Mollier diagrams constant enthalpy line can be used as the auxiliary line for the wet bulb temperature line to a satisfactory accuracy. Such diagrams find use in design include steam turbines refrigeration weather forecasting and air drying systems for the food sucks as coldstores and freezer room calculations.

So Id have assumed from the image for the relative humidity to be. From the Mollier chart the enthalpy of the moist air is approximately 40 kJkg. Relative humidity The relative humidity is the percentage of water vapour contained within a specific volume of air at a specific temperature relative to the maximum amount of water vapour that could potentially be held by the air.

The psychrometric chart is used for all operations handling humid air. The Mollier diagram is used to calculate the amount of water one needs to add in order to obtain a desired cooling effect or a desired humidity level in a room. The Psychrometric Chart is also known as the Mollier-Diagram when the axes are flipped.

The definition of absolute humidity is the actual amount of water vapor in the air while relative humidity is the ratio between the water vapor and the amount of water that the air can hold saturation at that given dry bulb temperature. Example - How to use the Mollier Chart. Zeuner refers to the ratio of humidity ratios as relative humidity.

The Mollier diagram and the Psychrometric Chart. Viewed 64 times. Absolute humidity isnt the same if the dry bulb temperature changes.

In general it is a relationship between enthalpy measure of the energy of a thermodynamic system air temperature and moisture content. On the Mollier diagram the wet-bulb lines slope a little upward to the left dotted lines. The Mollier i-x Enthalpy - Humidity Mixing Ratio diagram developed by Richard Mollier in 1923 is an alternative psychrometric chart preferred by many users in Scandinavia Eastern Europe and Russia.

Mollier The ix-diagram for airwater vapor mixtures 1929 4 13 4 which is defined by the ratio x. It includes all humidity functions in one chart. In this situation the percentage of relative humidity equals 100.

The Psychrometric Chart is also known as the Mollier-Diagram. The Mollier diagram is a very useful tool to solve HVAC-problems graphically. Lines of constant degree of saturation are constructed by x.

It allows to quickly relates the specific heat of air the absolute humidity relative humidity and temperature. Mollier diagram and reading the relative humidity when knowing the dry- and wet bulb temperatures. The Mollier diagram also called the enthalpy h entropy s chart or h-s chart is a graphical representation of thermodynamic properties of materials.

Relative humidity is the ratio of existing water vapour in the air to the maximum possible amount of vapour the air could potentially contain. Curves of constant enthalpy are added to Fig4a. Join points of equal relative humidity.

The chart is is combined with the Relative Humidity lines and the Enthalpy to calculate the change in total internal energy. The region below 100 fog region is not valid because condensation occurs. The state of air with dry bulb temperature 21 o C and relative humidity 50 is indicated in the Moliier chart below.

Psychrometric Charts Humidity Charts Youtube Psychrometric Chart Humidity Chart Chart

Mollier Chart Diagram Hvac Psychrometric Analysis Software Analysis Hvac Diagram

Fundamentals Of Psychrometrics Part 2 Greenbuildingadvisor Psychrometric Chart Temperature Chart Humidity Chart

Similar Architecture Franck Gehry Mcdonald S Where Is My Comfort Psychrometric Chart Hvac Design Architecture Exam

Assume That The Outside Air Temperature Is 32 C With A Relative Humidity F 60 Use The Psychrometric Chart To Psychrometric Chart Wet Bulb Temperature Chart

Mollier Diagram Psychrometric Chart Water From Air Diagram

Chapter 10b The Psychrometric Chart Updated 7 22 2014 Psychrometric Chart Chart Hvac Air Conditioning

Refrigerant Mollier Chart Main Air Conditioning Maintenance Diagram Chart

Psychrometric Chart Explained Psychrometric Chart Refrigeration And Air Conditioning Hvac Infographic