A international standard formulation for the thermodynamic properties of 1,1,1,2tetrafluoroethane hfc4a for temperatures from 170 k to. Refrigerants such as r4a have been developed and are now included in the. As all hfc refrigerants not damage the ozone layer. Will r4a gauges work on a r410a system, do they have the. The content and the intellectual layout in this chart are property of nrf bv. Huber national institute of standards and technology, marcia.
R4a is a pure refrigerant that is sometimes used in blends, while r410a is itself a blend. Constant density constant entropy constant temperature constant quality pressureenthalpy chart constant density density density density density 950. Visual ratings are listed for the neat lubricant, the lubricant refrigerant solution and the three. Compatiblllty concems if hfc4a and cfc12 are mixed 7. Will r4a gauges work on a r410a system, do they have the same fitting. R4a is also known as tetrafluoroethane cf3ch2f from the family of hfc refrigerant. Het koudeproces en het log ph diagram in een log ph diagram kan het verloop van een koudeproces worden gevolgd. No literature is available on analysis of r4a dmac at high generator temperature and also theoretical prediction of maximum cop with respect various operating conditions are not dealt. Thermodynamic properties of rl34a l,1,1,2tetrafluoroethane 1 marcia l. Instead you can convert an r12 system to an r4a system with a few parts and some basic tools. This video shows you how to convert your vehicles ac system from r12 to r4a using an idq retrofit kit. With the discovery of the damaging effect of cfcs and hcfcs refrigerants to the ozone. R4atables excel addin sample calculations in excel.
Pdf flowboiling of r22, r4a, r507, r404a and r410a. With thermodynamic properties that are very similar to those of r4a, isobutane was used in germany as early as 1992 to replace r12. Its gwp of 675 is within the acceptable limits for refrigerant gases used in new equipment splits with a load less than 3 kg, put on the market from 01012025, in compliance with european regulation ec no. Flow boiling heat transfer coefficients of r22, r4a, r507, r404a and r410a inside a smooth horizontal tube 6mm i. Refrigerant r4a thermodynamic properties eng units 2 equations the mbwr equation of state was used to calculate the tables of thermodynamic properties. We use cookies to give you the best possible experience on our website. It was chosen as the preferred equation of state because it provided the most accurate.
Your browser does not currently recognize any of the video formats available. Table a10 properties of saturated refrigerant4a 879. Appendix b log ph diagrams for refrigerants experts in brazed plate heat exchangers swep is a worldleading supplier of brazed plate heat exchangers for hvac and industrial applications. For thermodynamic properties the library uses new industrial formulation for r4a 1,1,1,2tetrafluoroethane, formulated. How to convert your cars ac system from r12 to r4a. Refrigerant r12 properties table filetype pdf r12 properties table filetype pdf product data summary and thermodynamic tables. By equation 2 third, if the mollier diagram of this fluid is analyzed, it can be seen that, for a. Temperature and pressure chart of refrigerants r22, r410a, r12, r4a, r401a, r409a, r502, r404a, r507a, r408a and r402a related searches for r4a working pressure chart related searches r4a.
How to convert an r12 to the r4a system it still runs. Enthalpy kjkg 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560 580 pressure bar 0,50 0,60 0,70 0,80. Diagramma ph del r22 diagramma di mollier dellacqua tabella dellacqua liquida sottoraffreddata diagramma ph dellammoniaca diagramma ph dellr12 diagramma ph dellr4a diagramma del. Air cooled screw liquid chillers r4a 150 385 tons 527 54 kwi 2 and 3 compressor 50 and 60 hz ashrae 90. Made by faculty at the university of colorado boulder, department of chemical and biological engineering. A comparison between refrigerants used in air conditioning derya ozkan, ozden agra and ozlem cetin university of yildiz technical university, turkey corresponding email.
How to convert an r12 to the r4a system by dustin thornton. While r4a and r410a are both environmentally conscious hydrochlorofluorocarbon refrigerants, the two are otherwise dissimilar. Jun 14, 2010 will r4a gauges work on a r410a system, do they have the same fitting. S301irfr4a honeywell analytics r4a refrigerant gas. Co 2 mollier diagram pressureenthalpy diagram mollier chart in metric units excel file 569 kb. Enthalpy kjkg 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560 pressure bar 0,50 0,60 0,70 0,80 0,90 1,00. Latitude yciv0157p, latitude yciv0177p, latitude yciv0187p.
Thermodynamic properties of r4a 1,1,1,2tetrafluoroethane. Allprops, center for applied thermodynamic studies, university of idaho. The dupont oval logo, dupont, the miracles of science and suva. Thus, modelio xmi export does not support diagrams. Hence, this study is focused on the thermodynamic investigations on r4a dmac based absorption refrigeration.
A phase diagram in physical chemistry, mineralogy, and materials science is a type of graph used to show the equilibrium conditions between the thermodynamicallydistinct phases. The locations to the left of the saturated liquid curve indicate that the refrigerant is in liquid form and locations to the right of the saturated vapor curve indicate that the refrigerant is in vapor form. Thermodynamics enthalpy entropy mollier and steam tables i. Sherpha project transcritical r744 heat pumps technicians manual 862 1. Absorptance the ratio of absorbed to incident solar radiation to that of incident. Technical r4a data sheet features and uses of r4a the refrigerant gas r4a is a hfc replacing r12 in new installations. Mclinden thermophysics division national institute of standards and technology. Download mollier h,x and enjoy it on your iphone, ipad, and ipod touch. Its gwp of 675 is within the acceptable limits for refrigerant gases used in new equipment splits with. This r4a refigerant calculator determines the gas pressure based on temperature of r4a. Pdf comparative performance between r4a and r152a in an.
The problem with butane is the low discharge superheat and the inability to heat much on compresion. The purpose of the compressor is to take a low pressure vapor and compress it into a high pressure vapor. Jun 30, 2008 this file contains additional information such as exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. Infrared spectrum of hfc4a vapor al 400 mmhg pressure 53. If you need the other person to access your diagrams. Per visualizzare il file, fai click su questo link.
Some scientific and engineering data online german. Download fulltext pdf download fulltext pdf comparative performance between r4a and r152a in an air conditioning system of a passenger car article pdf available october 2016 with 5,375 reads. A comparison between refrigerants used in air conditioning. Co 2 mollier diagram pressureenthalpy diagram mollier chart in metric. If your air conditioning is no longer cooling as well as it. It is intended to be used for advanced technical applications. With the discovery of the damaging effect of cfcs and hcfcs refrigerants to the ozone layer, the hfc family of refrigerant has been widely used as their replacement.
Figure a15 nelsonobert generalized compressibility chart. Pdf comparative performance between r4a and r152a in. R32 is suitable for new equipment specifically designed for r32, in applications that used to use r410a. This file contains additional information such as exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. Myths and facts of hvac refrigerants daikin applied. Thermodynamic properties of r4a 1,1,1,2tetrafluoroethane m. With the discovery of the damaging effect of cfcs and hcfcs refrigerants to the ozone layer, the hfc family of. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. Temperature and pressure chart of refrigerants r22, r410a, r12, r4a, r401a, r409a, r502, r404a, r507a, r408a and r402a related searches for r4a working pressure chart related searches r4a pressure chart pdf auto r4a pressure chart r4a pressure chart for cars pressure temperature chart r4a r4a pressure temp chart r4a pressure. Hi jimmy, xmi standard does not deal with diagrams. Answered by a verified hvac technician we use cookies to give you the best possible experience on our website. P h diagram r4a pdf p h diagram r4a pdf p h diagram r4a pdf download.
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