This issue could potentially be solved by replacing the previous generations high global warming potential gwp refrigerants with environmentally friendly refrigerants. In order to determine thermodynamic properties of refrigerant for all spans, new formulations were derived by ann model which was very well trained. Thermodynamic properties, lowgwp, refrigerant, hfo, centrifugal chiller abstract in refrigeration and airconditioning industry, hfcs refrigerantssuch as hfc4a, hfc245fa, r410a and r404a were developed as cfcs or hcfcs alternative refrigerants which have ozone depletion potential odp. A wide comparison with literature experimental data was made. Fundamental equations of state for hydrofluorocarbon hfc refrigerants were developed due to several percents of uncertainty of the specific heat in the gaseous phase near saturation and completely different behavior of the third virial coefficient. Download limit exceeded you have exceeded your daily download allowance. Ashrae thermodynamic properties of refrigerants by stewart, richard b. This information is based on values calculated using the nist refprop database mclinden, m. Thermodynamic properties of lowgwp refrigerant for. Characterize the heat transfer and thermodynamic properties and efficiency performance of new refrigerants and blends. The refrigerant in any refrigerator or air conditioner flows continuously through the vapor compression cycle, absorbing the heat in the evaporator and releasing it in the condenser. The thermodynamic properties of refrigerants columbushoa. This article describes thermodynamic properties of the refrigerants the ideal refrigerant.
Refrigerants r407c and r407a properties, uses, storage. Thermodynamic properties for the alternative refrigerants. Table a1e molar mass, gas constant, and criticalpoint properties table a2e idealgas specific heats of various common gases table a3e properties of common liquids, solids, and foods table a4e saturated watertemperature table table a5e saturated waterpressure table table a6e superheated water table a7e compressed liquid water table a8e saturated icewater vapor. Due to its high glide, this refrigerant is used only in mediumcapacity systems 50250 kw, which are usually serviced by skilled personnel. Simulate your system with the right refrigerant and export the results to excel. This site is like a library, use search box in the widget to get ebook that you want. Click download or read online button to get refrigerant tables and charts book now. If specific heat of refrigerant vapour is low then the shape of the. Refrigerants and their application presented by thomas e. Thermophysicalproperty needs for the environmentally. In fact, from the thermodynamic or heatcarrying standpoint, differences among refrigerants with similar. Most properties that are available in the graphical interface can also be calculated in the spreadsheet.
Thermodynamic properties of selected hfc refrigerants pdf,na pp, 1077 kb, about pdf. The refrigerants have a thermodynamic property charge. Write the chemical formula of a refrigerant from its number. Thermodynamic properties of refrigerants using artificial. Modeling of thermodynamic properties for pure refrigerants and. These tables are based on experimental data from the database at the. Three cubic equations of state geos3c, srk and pr were used. In this study, thermodynamic properties as saturation pressure. Discuss refrigerant selection criteria based on thermodynamic, thermophysical, environmental. Thermodynamic analysis of subcooling and superheating.
These physical properties of refrigerants help us select the proper refrigerant for the application as per our requirement. Technical information at22 thermodynamic properties of dupontz freon. Doe fundamentals handbook thermodynamics, heat transfer, and fluid flow volume 1 of 3 u. In the process simulators, the most famous eoss are of cubic type, such as equation 2, and all the thermodynamic properties like residual enthalpy can be calculated from such an eos cf. Solstice yf was originally developed as a low global warming potential replacement for r4a in the automobile airconditioning application.
A number of safer refrigerants have been developed that are fast. Refrigerant tables and charts download ebook pdf, epub. Thermodynamic properties of duponttm freonr 12 r12. Fellow ashrae mcquay international staunton, virginia usa 1 what is a refrigerant. R410a has very attractive thermodynamic properties, higher energy efficiency than r22, no glide and hence no problem with the mixture remaining after charge loss and refill. On this page you can read or download refrigerants chapter download in rs khurmi in pdf format. This is a haloalkane refrigerant with thermodynamic properties similar to r12 dichlorodifluoromethane but with insignificant ozone depletion potential and a somewhat lower global warming potential 1,430, compared to r12s gwp of 10,900. A list of hydrogencontaining halocarbons, as well as their mixtures, is presented as alternatives to the environmentally harmful, fully halogenated chlorofluorocarbons.
In this study, in order to calculate accurately thermodynamic properties as an enthalpy, entropy, internal energy, specific volume, density, quality. The refrigerants have a thermodynamic property chart on pressure most cfc. Refrigerants r407c and r407a properties, uses, storage, and handling. Pc running windows 98, 2000, xp, vista, window 7 or similar operating system. Regulatory oversight on refrigerants such as cfc, hcfc, and other synthetic refrigerants, have refocused attention on ammonia to emerge as one of the widely used refrigerants that, when released to the atmosphere. Abstract models commonly used to calculate the thermodynamic properties of refrigerants are summarized.
Accurate thermophysical properties are available for several fluids. Volumetric and thermodynamic properties were predicted for three pure hydrofluorocarbons r32, r125 and r4a as well as for binary and ternary mixtures of these refrigerants. Ashrae thermodynamic properties of refrigerants 1986. Usually, a fluid, used in a heat pump and refrigeration cycle that can extract heat from another body or substance. Volkmar hasse, gtz proklima, germany preface volkmar hasse, gtz proklima i. List important thermodynamic and environmental properties influencing refrigerant selection. The refrigerants have a thermodynamic property chart on pressureenthalpy coordinates with an abbreviated set of tabular data for saturated liquid and vapor on the faci ng page. Compare performance of multiple refrigerants, learn the line sizing, and much more all for free. Unlimited viewing of the articlechapter pdf and any associated supplements. For pure refrigerants, the virial, cubic, martinhou, benedictwebbrubin, and helmholtz nist equations of state and the extended corresponding states model are discussed. Next generation of low global warming potential refrigerants. This portable document format pdf file contains bookmarks, thumbnail s, and hyperlinks to help you navigate through. Many different refrigerants have been used in the past and are in use today with good ability to transfer heat from one place to another.
View the article pdf and any associated supplements and figures for a period of 48 hours. We present experimental measurements of the density, speed of sound, and vapor pressure of trans1chloro3,3,3trifluoropropene, which is also known as r1233zde. It is very important to find new ways to calculate thermodynamic properties of new refrigerants to simplify equipment operation and design. This paper explores the ongoing efforts by those who are anticipating the more widespread use of flammable refrigerants in hvac equipment and appliances, with the principle focus on. Thermodynamic properties booklets are also available for freon 407c and freon 407a in both english and metric units. Properties of commonly used refrigerants a refrigerant is a substance or mixture. The study on the thermodynamic properties of the mixed refrigerants in the arc cycle is very. Calculation of the thermodynamic properties of refrigerants 12, 22, and 502 using a digital computer. Refrigerants used in the vapor compression cycle of refrigerators and air conditioners have been found to have a very damaging effect on the atmosphere. The application of artificial neural networks anns for prediction of thermodynamic properties of refrigerants in vaporliquid equilibrium is the scope of this article.
Appendix a thermodynamic property tables saturation properties of ammonia ip units saturation properties of ammonia using software refprop nist where the equations and constants for ammonia originate from swatzenberg and baehr 1993, eine neue fundamentalgleichung fure ammoniak, dvktagungsbericht, vol. The thermodynamic properties of the refrigerants are formulated using artificial neural network ann methodology. This scenario requires an analysis of new refrigerants for a comparison of the thermodynamic properties of the previously used refrigerants. Thermodynamic properties of duponttm freonr 22 refrigerant author.
Pdf thermodynamic properties of refrigerant r116 from. The study of thermodynamic properties of zeotropic. New tables of the thermodynamic properties of dupont. A number of materials have physical and thermodynamic properties suitable for their use as refrigerants. Refrigeration is the achievement of temperatures below that of the local environment. Natural refrigerants sustainable ozone and climatefriendly alternatives to hcfcs introduction dr. Tables of the thermodynamic properties of dupont freon 12 r12 have been developed and are presented here. Pdf development of fundamental equations of state for. Sound speed data were measured at temperatures between 290 and 420 k, with pressures from 0. Epa home science inventory thermodynamic properties of selected hfc. Because of its desirable environmental properties, along with other factors, it is being. The main purpose of refrigeration is thermal conditioning e. This section presents data for the thermodynamic and transport properties of refrigerants, arranged for the occasional users.
A key feature of solstice 452a is its matched compressor discharge temperature of r404a and r507 at both low and mediumtemperature. Densities were measured over the temperature range from 215 to 444 k, with pressures from 0. It is found that subcooling and superheating temperatures directly influence the system performance as both condenser and evaporator temperatures are affected. Effects of refrigerant properties on refrigerant performance citeseerx. The cfcs r12, r11, r114 and r502 together with hcfc r22 became the definitive refrigerants. The thermodynamic properties are obtained by using equations of state eoss. Pdf thermodynamic properties of refrigerant r116 from cubic. Download thermodynamic properties of duponttm freonr 22 document.
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