Mollier diagram pdf

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Start Free Trial Cancel anytime. Uploaded by Sadhasivam Velu. Document Information click to expand document information Description: engineering. Date uploaded Mar 16, Did you find this document useful?

Is this content inappropriate? Report this Document. Description: engineering. Flag for inappropriate content. Download Now. Related titles. Carousel Previous Carousel Next. A Textbook of Engineering Mechanics by R. Jump to Page. Search inside document. I Page No. Saturated Water and Steam Temperature Tables 2. Supercritical Steam IV xviii 5. Value of g0 Universal gas constant 9.If you think that the slightly skew edges of your Mollier or Psychrometric Diagram are the result of multiple passes of the image through bad copier optics, then this article is for you.


One can make a reasonable career in preventive conservation, and carve out a position of influence and power, through understanding this one diagram.

It describes all the properties of moist air that the conservator needs to know.

mollier diagram pdf

A thorough understanding of how the diagram is constructed is a great help in using it, particularly when exploring thermal properties of moist air. They are identical in content but not in appearance. I will describe first the Mollier diagram and then show the simple transformation that changes it into the psychrometric chart. The Mollier diagram, also called the ix diagramis based on the relationship between heat content and water vapour content of air.

The heat, or energy, content is difficult to measure directly, so the diagram is cunningly distorted to give the illusion of being based on the relationship between temperature and relative humidity and water vapour content. Temperature is easy to measure, relative humidity is considered by some people to be easy to measure and so the diagram is transformed into a useful tool.

Heat content is called enthalpy in the jargon of the air conditioning engineer, so I will use this word from now on. It is measured in Joules. By convention, the enthalpies of both water and dry air are defined to be zero at zero degrees Celsius.

To obtain the enthalpy of moist air at any temperature we need to calculate three quantities: how much heat needs to be used to vapourise the water, how much heat is needed to warm the water vapour to the required air temperature and how much heat must be added to the other, constant components of the air, mostly nitrogen and oxygen.

It is helpful to start by getting a sense of the magnitude of these quantities by calculating an example, before looking at the diagrammatic representation which generalises them. It weighs about 1 kg. The water content is about 0. Just evaporating the water takes 0. Raising the temperature of this steam by ten degrees requires 10 x 0. Finally the nitrogen and oxygen take 10 x 1 the weight of the air x 1.

Heating the air is the largest of the three energy inputs that are needed. This is why humidification is expensive. This calculation can be generalised in a diagram showing lines of constant temperature plotted on a grid with enthalpy, ion the vertical axis and water vapour content, xon the horizontal axis:. Consider first the bold red line marked 0 degrees C. The slope upwards to the right indicates that energy is needed just to add water vapour to the air at constant temperature. The line for 20 degrees starts higher up the energy axis, ibecause energy is needed to raise the temperature of dry air.

The line then rises diagonally with increasing water content, nearly parallel to the isotherm for zero degrees, but with a slightly greater upward slope. This divergence is because the energy needed to heat the water vapour component of the air is greater than that for dry air: the specific heat of dry air is about 1 kilojoule per kilogram per degree while the value for water vapour is 1.

This then is the basic diagram linking enthalpy, water content and temperature.Ressources — GazeChim Froid. Figura A- 10 Diagrama de Mollier para el Agua. Pdf To download full versionMethane Mollier Diagram. Pressure ptcl student package registration form download pdf enthalpy chart for R Mollier Diagram Pro is an easy to use mollier diagram with which you can make calculations of air treatment processes.

How to Use Steam Tables

Mollier diagram r22 pdf download Refrigeration system can be plotted on the P- H diagram. An enthalpy— entropy chart, also known as the h— s chart or Mollier diagram, plots the total heat against entropy, describing the enthalpy of a thermodynamic system. Microsoft Word Freon 12 chart. RA Mollier Diagram pdf 53 kb.

R22 pressure enthalpy chart pdf. First it has to be reflected in a vertical mirror, then rotated 90 degrees. Uploaded by Teguh Aditanoyo.

The process transforming a Mollier diagram to a psychrometric chart is shown below. Read online and download pdf ebook r22 mollier diagram. Download Info; Definitions Part 2. Is the air property that is moloier common used. Cs 1 6 amx plugin.

Line A to B represents the change from high to low pressure. The Mollier diagram is a graphic dixgramme of the relationship between air temperature, moisture content and enthalpy and is a basic design tool for building.

Diagrama de mollier r22 pdf 0 t 0 o C. Air becomes completely Mollier diagram graphic representation relationship between. Mollier diagram easy to use simulation software, mollier diagram pro air treatment calculationssimulation.

Mollier Diagram Pro - easy HVAC Simulations

Teamcenter vis mockup pdf. As an R22 replacement, RA may be used in a wide range of. The bubble to the left is the portion of the diagram where. Pressure- enthalpyP- H or Mollier diagram.


Ra refrigerant ph chart.Les frigoristes utilisent des diagrammes enthalpiques pour y tracer le. DownloadDiagramme de mollier ra pdf. If you can then copy the data from the table and post here I d be forever in your debt I have moved from processing. Pression absolue.

mollier diagram pdf

Absolute pressure bar. Lines of constant dryness fraction xsometimes called the qualityare drawn djagramme the wet region and lines of constant temperature are drawn in the superheated region. By using this site, you agree to the Terms of Use and Privacy Policy. This page was last edited on 24 Juneat The enthalpy coordinate is skewed and the constant enthalpy lines are parallel and evenly spaced.

An enthalpy—entropy chartalso known as the H — S chart or Mollier diagramplots the total heat against entropy, [1] describing the enthalpy of a thermodynamic system. Views Read Edit View history. It can be used in practical applications such as maltingto represent the grain—air—moisture system.

In an isobaric processthe pressure remains constant, so the heat interaction is the change in enthalpy.

At first inspection, there may appear little resemblance between the charts, but if the user rotates a chart ninety degrees and looks at it in a mirror, diagrammee resemblance is mlolier. The work done in a process on vapor cycles is represented by length of hso it can be measured directly, whereas in a T—s diagram it has to be computed using thermodynamic relationship between thermodynamic properties.

The underlying property data for the Mollier diagram is identical to a psychrometric chart. A vertical line in the h—s chart represents an isentropic process. The Mollier diagram coordinates are enthalpy h and humidity ratio x.

mollier diagram pdf

Later the deviations from the ideal values and they can be calculated considering the isentropic efficiency of the steam turbine used. In general such charts do not show the values of specific volumesnor do they show the enthalpies of saturated water at pressures which are of the order of those experienced in condensers in a thermal power station.

On the diagram, lines of constant pressure, constant temperature and volume are plotted, so in a two-phase region, the lines of constant pressure and temperature coincide. So the expansion process in a turbine can be easily calculated using the h—s chart when the process is considered to be ideal which is the case normally when calculating enthalpies, entropies, etc.

In an isenthalpic processthe enthalpy is constant. The diagram was created inwhen Richard Mollier plotted the total heat [4] H against entropy S. Above the heavy line, the temperature is above the boiling point, and the dry superheated substance is gas only.

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The quantity of saturated vapor in unit mass of wet vapordenoted by xis referred to as the. The value can be verified by using the steam table. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro. We don't collect information from our users.

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If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. The diagram below can be used to determine enthalpy versus entropy of water and steam. See also Water - Enthalpy H and Entropy S for figures and tabulated values at varying temperatures Dryness Fraction The quantity of saturated vapor in unit mass of wet vapordenoted by xis referred to as the dryness fractionor quality, of the vapor.

mollier diagram pdf

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From Wikipedia, the free encyclopedia. This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. Summary Description Mollier. This work is free and may be used by anyone for any purpose. If you wish to use this contentyou do not need to request permission as long as you follow any licensing requirements mentioned on this page.

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Author Robert Hanna Short title Mollier Namespaces File Talk. Views Read View on Commons. Tools What links here Upload file Special pages Page information.

Description Mollier. Permission Reusing this file. Public domain Public domain false false. I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purposewithout any conditions, unless such conditions are required by law.Fixing the value of any two properties defines the value of all the others.

Thus fixing the values of Enthalpy and Entropy is sufficient to define Temperature, Pressure and Internal Energy of the steam. Commonly used Mollier diagrams are the enthalpy-entropy or h-s diagram below and the pressure-enthalpy diagram illustrated at the bottom of this page. The h-s diagram is one in which Enthalpy values form the vertical axis and Entropy the horizontal axis. The values of the other related properties may be superimposed in the form of supplementary curves.

Ideal isentropic expansion is represented on the Mollier diagram by a vertical line. Actual expansion of steam always involves some losses represented by an increase in entropy. Here he assumes that the steam enters the cylinders at an absolute pressure of He then assumes that the steam will exhaust at an absolute pressure of 1. Thus an isentropic expansion line AB can be drawn vertically at a constant entropy of 7.

However in FDC 1. Thus the actual steam expansion is defined by the line AC. The slope of the line AC is indicative of the isentropic efficiency of the expansion: the nearer the line is to vertical, the higher isentropic efficiency.

Actual isentropic efficiency is determined by dividing the specific work done in the cylinder FDC 1. Porta used similar lines in his Compounding paper but has simplified them by omitting all the irrelevant lines from his diagrams. The Pressure-Enthalpy diagram below is an alternative representation of the Steam Tables, where the axes are Pressure Vertical and Enthalpy Horizonatl and with curves representing temperature Tentropy sspecific volume vand dryness fraction x.

Note: The same points A, B and C from the diagram above are illustrated in red. In this case the line of constant pressure BC is straight and the line of constant entropy AB is curved.

Mollier Diagrams. There are six interrelated properties that define the state of steam: Temperature Pressure Dryness Fraction within the saturated zone Enthalpy Internal energy Entropy Fixing the value of any two properties defines the value of all the others.

The Enthapy-Entropy or h-s diagram: The h-s diagram is one in which Enthalpy values form the vertical axis and Entropy the horizontal axis. In the diagram below: green lines show steam temperature ; blue lines give absolute steam pressure ; and red lines give the dryness fraction in the saturated zone.

Pressure-Enthalpy diagram The Pressure-Enthalpy diagram below is an alternative representation of the Steam Tables, where the axes are Pressure Vertical and Enthalpy Horizonatl and with curves representing temperature Tentropy sspecific volume vand dryness fraction x. The dome-shaped curve represents the limits of saturation — within the dome, steam is saturated.

Steam Tables. Why is the 5AT not more innovative?

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