R134a in domestic refrigerator pravin k katare dr professor , research scholar, department of mechanical comparison, alternative refrigerant, r134a, refrigerator i introduction stratospheric ozone deplation as well as atmospheric obtained operating data relating to selected refrigerants table 1 shows these results the analysis of. Uses of refrigerant tables saturated refers to the con-dition of a liquid at its boiling temperature, and of a vapor at its condensing temperature columns 2 and 3: pressure column 2 lists the absolute pressures (psia) and column 3 lists the gauge pressures (psig) of the sat. A domestic r134a refrigerator was selected cuo-r134a nano-refrigerant was prepared and used as t coumaressin & k palaniradja 462 working fluid to evaluate the heat transfer coefficients for different concentrations of table 2: results from the refrigeration test rig. The refrigerant r600a has been used in the past in refrigerators up to the 1940s, and has today a wide range of uses in domestic refrigerators and freezers again in europe where most refrigera- tors are manufactured using r600a as refrigerant. R12 conversion to r134a refrigerant specifications r12 to r134a conversion is specified by refrigerator model number use the complete model number when ordering conversion kits.
Refrigerant, the r 134a is one of the present choices for replacing the r 12 replaced by r 134a in a domestic refrigerator, as shown in figures 5, 6, 7 and 8 it is interesting to observe in this example that some use of r 134a in new lbp refrigeration systems. Iii abstract this paper develops a steady -state system design model for a standard 18 ft 3 refrigerator/freezer models for the compressor, condenser, evaporator, and suction line interchanger are considered. R134a and r600a energy efficiency index comparison in a domestic refrigerator using iranian and european standards 1 mahmood mastani joybari, 2 mohammad sadegh hatamipour, 3 amir rahimi, 4 fatemeh ghadiri modarres 1,2,3 department of chemical engineering, university of isfahan 4 r&d department. 1,1,1,2-tetrafluoroethane - r-134a - is an inert gas used primarily as a high-temperature refrigerant for domestic refrigeration and automobile air conditioners sponsored links related topics.
Ecofriendly refrigerant used in the domestic refrigerator the performance of the refrigerator will be studied using r134a refrigerant and mixture of propane r290 and isobutene r600a. 2 cn60e202 november 2000 refrigerant r 600a, or isobutane, is a possible replacement for other refrigerants, which have high impact on the environment, in domestic refrigerators. Apparently when the refrigerant changes its specific weight and density would also change as if i need 08 kg of r134a for a standard size household refrigerator and if switched to r 22 which is. Comparative assessment of environment-friendly alternatives to r134a in domestic refrigerators m to compare the performance of various refrigerants in domestic refrigerator, knowledge of their thermody- the following operating conditions are considered in the present study for r134a and its alternatives (table 2) the condensation. Especially, the oi i of a refrigerator having the most sui table feature lo the kind of refrigerant and the type of a compressor shall be selected because the feature of refrigerator's oi 1 for a compressor has changed contrary to the use of oi 1.
Refrigerant r134a the refrigerant r134a is the chemical compound tetrafluoroethane comprising of two atoms of carbon, two atoms of hydrogen and four atoms of fluorine its chemical formula is cf3ch2f the molecular weight of refrigerant r134a is 1334 and its boiling point is -151 degree f. Replacements of r134a in domestic refrigerator with zero odp and low gwp hydro carbons and its blends the assessed refrigerants are r290, r600a, r430a, r436a. The refrigerators are further segmented into domestic refrigerators, commercial refrigerators (medium scale), industrial & supermarket refrigerator (large scale), and transport refrigerator air conditioners (ac) are sub-segmented into centralized ac, split ac, window ac, portable ac, and hybrid ac. Hi dilip sahasrabu to convert it to r 22, you will need a smaller compressor with the same capacity the condenser will be too small though using r 134a, you will have to replace the compressor and clean the system from all oil residues.
Refrigerant (r-134a) properties, uses, storage, and handling freon™ 134a refrigerant 3 table of contents freon™ 134a refrigerant 6 table 2 physical properties of freon™ 134a physical property unit freon™ 134a chemical name — ethane, 1,1,1,2-tetrafluoro chemical formula — ch 2 fcf 3. The first three generations of refrigerants (r-12, r-22, r-134a/r-404a) had relatively small differences in pressures and temperature ratings, so some of them could be used as drop-in replacements and some required small changes to equipment. R12 conversion to r134a refrigerant general information this instruction sheet provides procedures for converting specific r12 refrigerator sealed systems to r134a the conversion requires replacing the compressor with an r134a replacement compressor with charge with 4 oz of r134a refrigerant into access valve at replacement filter. Refrigerant gas there are a lot of r134a or r600a on a domestic unit sealed systems these systems are sealed if they leak then the unit will stop cooling, fast the failure rates of actual refrigerant systems in domestic units after you get past the first week or so, extremely low. The performance is observed for a domestic refrigerator by using blend of hydrocarbon r-600a and r-290 and its performance is compared with r- 134a without change in original system due to the higher value of latent heat of hydrocarbons the amount of refrigerant charge required found to be reduced as compared with hydrofluorocarbon r-134a.
Performance of a domestic refrigerator was investigated using r12, r134a and r152 refrigerants where exergy destruction in compressor, evaporator and capillary tube was higher for r134a than that of r152a (bolaji, 2010. Included in ashrae (1998)  for pure (r-134a),(r-22), and (r-410a) the object of these curves is to establish the required capillary refrigerant flow rate for specified geometry and entering condition. 411 tables for refrigerant of r134a in the domestic icebox table reading taken from the procedure of r134a refrigerant placed within the experimental apparatus - tables for refrigerant of r134a in the domestic refrigerator introduction. Service r134a refrigerator category howto & style show more show less fixing refrigerator that not cooling enough by recharging r-134a freon diy - duration: 27:25 teddy hashee 635,974 views.
Like other refrigerants, the pressure of r134a corresponds to its temperature you can determine the refrigerant pressure at any temperature between −22 and 202 degrees fahrenheit by reading the value from a pressure temperature chart. A domestic refrigerator designed to work with r-134a as refrigerant was used as test unit to assess the possibility of pure butane as refrigerant the experiments are conducted with th e.
True begins rolling out r290 refrigerant technology true refrigeration, an industry leader in restaurant refrigeration solutions from reach ins to prep tables, has made a change that will eventually affect their entire line of equipmentthis change is intended to help protect the environment and save operators money on the lifetime cost of ownership of true equipment.