The global warming potential of R134a is 1430. On the other hand, R12 has a global warming potential of 10,910. Hence, the effect of R12 on global warming is up to 10,000 times higher than carbon dioxide. A comparison between R12 vs. R134a temperature will show that R12 has a higher temperature than R134a.
Effect of condenser fouling is evaluated on the performance of a vapour compression system with refrigerants HFO1234yf and HFO1234ze as an alternative to HFC134a. The condenser coolant temperature has been varied between 35 and 40°C to evaluate the effect of fouling at different condenser temperatures. A simulation model is developed in EES for computing the results. The results have been
Heat transfer evaluation of R-134a and other refrigerants have become important for reducing the use of R-12. R-134a is a potential replacement for R-12 (Eckles and Pate, 1991). R-134a contributed
R134a¶ References¶ Equation of State¶ Reiner Tillner-Roth and Hans Dieter Baehr. A International Standard Formulation for the Thermodynamic Properties of 1,1,1,2-Tetrafluoroethane (HFC-134a) for Temperatures from 170 K to 455 K and Pressures up to 70 MPa. J. Phys. Chem. Ref. Data, 23:657–729, 1994. doi:10.1063/1.555958. Thermal Conductivity¶
1) Extended the requirements of the Refrigerant Management Program to cover substitute refrigerants, such as HFCs. Note that EPA has previously exempted some substitutes from the Section 608 venting prohibition through previous rules. Such substitutes are also exempt from the requirements of this rule. 2) Lowered the leak rate thresholds that
The service ports in both systems are quick-connect, but they are taller in the yf systems to avoid cross-contamination. Another difference is that yf Evaporators must meet SAE Spec J2842, which was not an issue in R-134a systems. A final difference is that most (though not all) R-1234yf cars will have a Suction Line Heat Exchanger.
HFC-134a is the alternative refrigerant of choice to replace CFC-12 in many medium- and high-temperature stationary refrigeration and air conditioning applications. However, R-134a is not a direct drop-in refrigerant for R-12. Retrofit guidelines must be followed carefully when converting a system from R-12 to R-134a.
R-134a Safety Data Sheet R-134a 1. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION PRODUCT NAME: R-134a OTHER NAME: 1,1,1,2-Tetrafluoroethane USE: Refrigerant Gas DISTRIBUTOR: National Refrigerants, Inc. 661 Kenyon Avenue Bridgeton, New Jersey 08302 FOR MORE INFORMATION CALL: IN CASE OF EMERGENCY CALL:
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is hfc134a the same as r134a
