The montreal protocol marked a turning point in refrigeration industry and has a focus on international commitment to end the use of cfc and hcfc refrigerants aimed to protect the environment. R4atables excel addin sample calculations in excel. 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. Safety data sheet refrigerant gas r4a national ref. Mp series use 10f 5c, 9000 use 11f 6c, hp80 and hp81. Refrigerants temperature and pressure at constant boiling.
Students will see the difficulty of creating an hr diagram due to the large amount of data necessary. Actually it is log pressure versus enthalpy up mollierchart cooltime if you need to compare the performance of refrigerants, this program will suit your needs. Safety data sheet refrigerant gas r4a version 2 revision date. It is intended to be used for advanced technical applications. You can assume that all the stars are at the same distance. One of the al ternatives to overcome these drawbacks is vapour absorption refrigeration systems which use noncfchcfc working flu ids. R4a is also known as tetrafluoroethane cf3ch2f from the family of hfc refrigerant. Data aire series units are available in 6 through 30 nominal tons. Thermodynamic properties of rl34a l,1,1,2tetrafluoroethane 1 marcia l. Tables for refrigerant of r4a in the domestic refrigerator. Measurements on thermal conductivity and viscosity of rl34a are discussed in this paper. In thedomain of small commercial appliances, manufacturers. For thermodynamic properties the library uses new industrial formulation for r4a 1,1,1,2tetrafluoroethane, formulated in helmholtz energy. Technical r4a data sheet features and uses of r4a the refrigerant gas r4a is a hfc replacing r12 in new installations.
May be used instead of r12 in existing systems if a conversion procedure is. As a current student on this bumpy collegiate pathway, i stumbled upon course hero, where i can find study resources for nearly all my courses, get online help from tutors 247, and even share my old projects, papers, and lecture notes with other students. Sherpha project transcritical r744 heat pumps technicians manual 862 1. Thermodynamic properties of r4a 1,1,1,2tetrafluoroethane. This case is also to evaluate various cycles such as with penalties, economizing for a. Technical data sheet compressor model gl60pb voltage 220240v 50hz 1 refrigerant r4a application compressor motor application highmedium back pressure displacement 5,68 cm.
The product was field tested during the last summer olympics games, athens, 2004. Engineering toolbox resources, tools and basic information for engineering and design of technical applications. 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. Technical data sheet compressor model gl60pb 220240v 50hz 1. The ph10 has all the same features as our power pro 5 amp system described previously, but with a whopping 10 amps of power for oscale and large scale g layouts.
They will then use one of two simple tools to search the data and make and hr diagram for a globular cluster using hundreds of data points. P h diagram r4a pdf p h diagram r4a pdf p h diagram r4a pdf download. Dd34 diagramme enthalpique cycle frigorifique cop froid youtube. Data aire series units offer precision environmental control that brings a standard of reliable performance to meet todays market demands. Refrigerants temperature and pressure charts temperature and pressure chart for refrigerants r22, r410a, r12, r4a, r401a, r409a, r502, r404a, r507a, r408a and r402a tag search en. Thermodynamic properties of r4a 1,1,1,2tetrafluoroethane m. It may be necessary to reset the pressure cutouts to suit the different pressures of the replacement refrigerant. Refrigerant r4a, hfc, air conditioning, high temperature. Atlas of eh ph diagrams intercomparison of thermodynamic databases geological survey of japan open file report no. Rapid evaporation of the liquid may cause frostbite. There is an open access version for this licensed article that can be read free of charge and without license restrictions. R4a, r407c, r507, r404a, r410a, r744 no flammability lowno toxicity high toxicity refrigerants marked in red are ozone depleting substances that are no longer used in new equipment. Table reading taken from the process of r4a refrigerant placed within the experimental setup. It is very easy to use and gives the basic cycle performance both graphically and in text fo.
National institute of advanced industrial science and technology research. 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. Select any topic from the next column to view the video lecture here. Mistral refrigerant ph charts ph charts for r4a, r22, r404a, r407c, r410a, r717 ammonia and r744 carbon dioxide free download request. The eh ph module is ba sed on stabcal stability calculations for aqueous systems developed by h. 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. Mollier h lgp diagramme technische informationsbibliothek tib. Identification of the substancemixture and of the companyundertaking product identifier. 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. Refrigerant r4a properties thermodynamic properties of refrigerant r4a.
Data aire systems are designed for data centers, telecommunication sites, or anywhere process cooling is required. R4a is a hydrofluorocarbon hfc designed for domestic, commercial and industrial refrigeration systems, as well as air conditioning systems, liquid refrigeration systems and heat pumps. With thermodynamic properties that are very similar to those of r4a, isobutane was used in germany as early as 1992 to replace r12. Mclinden thermophysics division national institute of standards and technology. As all hfc refrigerants not damage the ozone layer. For the same reasons, tables of properties of hcfc r123, and hfcs r4a, r404a. The content of the open access version may differ from that of the licensed version. Vapour is heavier than air and can cause suffocation. The ph value of the water shall be measured by addition of a few drops of dilute sodium chloride 4. Tracer du cycle frigorifique sur le diagramme enthalpique et calcul du cop froid, cop chaud. R4a is used in large chillers and by car ac and agricultural manufacturers. Safety data sheet according to regulation ec no 19072006 and 4532010 dupont suva 4a refrigerant version 6. Case1 the basics of refrigeration cycle ph diagram analysis.
Ammonia, nh3 pressureenthalpy diagram sspecific entropy, kjkgk ttemperature. No data on these properties have been found in the literature. The ph10 can use any power supply up to 22v ac or 32v dc, just make sure you have a circuit breaker. 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. For calculating heat transfer coefficients of the refrigerants two approaches have been considered. Requires an additional 18v, 1012 amp power supply such as the brutus. Im going to program my ti82 to convert all the imperial expressions used by the prof, then i can jump on board and go for a ride through the thermophysical wonderland i see the prof pointing at on the near horizon here the prof would be amused if he had helped in any small way to return the world back to imperial units. Enthalpy kjkg 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 pressure bar 0,50 0,60 0,70 0,80 0,90 1,00. Allprops, center for applied thermodynamic studies, university of idaho. Isobutane r600a isobutane is a hydrocarbon, and hence is flammable. Mistral refrigerant ph charts mistral associates r410a.
It has a great chemical and thermal stability, low toxicity and is nonflammable, besides having an excellent compatibility with most materials. Huber national institute of standards and technology, marcia. The purpose of the compressor is to take a low pressure vapor and compress it into a high pressure vapor. It is very easy to use and gives the basic cycle performance both graphically and in text form. Channel, dpak features planar hd3e process for fast switching performance low rdson to minimize conduction loss low ciss to minimize driver loss low gate charge optimized for high side switching requirements in high. The pressureenthalpy chart plots the properties of. Experimental studies on r4admac hot water based vapour. Atlas of ehph diagrams intercomparison of thermodynamic databases geological survey of japan open file report no. Technical data sheet compressor model gl60pb 220240v. Refrigerant changeover from hfc r4a to hfchfo r450a r5a.